CVE-2025-21961

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-21961", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-12-29T08:45:45.795Z", "datePublished": "2025-04-01T15:46:58.795Z", "dateUpdated": "2026-10-30T12:21:03.937Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:21:03.937Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\neth: bnxt: fix truesize for mb-xdp-pass case\n\nWhen mb-xdp is set and return is XDP_PASS, packet is converted from\nxdp_buff to sk_buff with xdp_update_skb_shared_info() in\nbnxt_xdp_build_skb().\nbnxt_xdp_build_skb() passes incorrect truesize argument to\nxdp_update_skb_shared_info().\nThe truesize is calculated as BNXT_RX_PAGE_SIZE * sinfo->nr_frags but\nthe skb_shared_info was wiped by napi_build_skb() before.\nSo it stores sinfo->nr_frags before bnxt_xdp_build_skb() and use it\ninstead of getting skb_shared_info from xdp_get_shared_info_from_buff().\n\nSplat looks like:\n ------------[ cut here ]------------\n WARNING: CPU: 2 PID: 0 at net/core/skbuff.c:6072 skb_try_coalesce+0x504/0x590\n Modules linked in: xt_nat xt_tcpudp veth af_packet xt_conntrack nft_chain_nat xt_MASQUERADE nf_conntrack_netlink xfrm_user xt_addrtype nft_coms\n CPU: 2 UID: 0 PID: 0 Comm: swapper/2 Not tainted 6.14.0-rc2+ #3\n RIP: 0010:skb_try_coalesce+0x504/0x590\n Code: 4b fd ff ff 49 8b 34 24 40 80 e6 40 0f 84 3d fd ff ff 49 8b 74 24 48 40 f6 c6 01 0f 84 2e fd ff ff 48 8d 4e ff e9 25 fd ff ff <0f> 0b e99\n RSP: 0018:ffffb62c4120caa8 EFLAGS: 00010287\n RAX: 0000000000000003 RBX: ffffb62c4120cb14 RCX: 0000000000000ec0\n RDX: 0000000000001000 RSI: ffffa06e5d7dc000 RDI: 0000000000000003\n RBP: ffffa06e5d7ddec0 R08: ffffa06e6120a800 R09: ffffa06e7a119900\n R10: 0000000000002310 R11: ffffa06e5d7dcec0 R12: ffffe4360575f740\n R13: ffffe43600000000 R14: 0000000000000002 R15: 0000000000000002\n FS: 0000000000000000(0000) GS:ffffa0755f700000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 00007f147b76b0f8 CR3: 00000001615d4000 CR4: 00000000007506f0\n PKRU: 55555554\n Call Trace:\n <IRQ>\n ? __warn+0x84/0x130\n ? skb_try_coalesce+0x504/0x590\n ? report_bug+0x18a/0x1a0\n ? handle_bug+0x53/0x90\n ? exc_invalid_op+0x14/0x70\n ? asm_exc_invalid_op+0x16/0x20\n ? skb_try_coalesce+0x504/0x590\n inet_frag_reasm_finish+0x11f/0x2e0\n ip_defrag+0x37a/0x900\n ip_local_deliver+0x51/0x120\n ip_sublist_rcv_finish+0x64/0x70\n ip_sublist_rcv+0x179/0x210\n ip_list_rcv+0xf9/0x130\n\nHow to reproduce:\n<Node A>\nip link set $interface1 xdp obj xdp_pass.o\nip link set $interface1 mtu 9000 up\nip a a 10.0.0.1/24 dev $interface1\n<Node B>\nip link set $interfac2 mtu 9000 up\nip a a 10.0.0.2/24 dev $interface2\nping 10.0.0.1 -s 65000\n\nFollowing ping.py patch adds xdp-mb-pass case. so ping.py is going to be\nable to reproduce this issue."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:N - The bug is triggered entirely by an inbound Ethernet frame processed in the bnxt_en NAPI receive path (bnxt_rx_pkt \u2192 bnxt_xdp_build_skb), with the splat landing in ip_defrag()/skb_try_coalesce(); no local access to the target is required. Jumbo/multi-buffer frames are routable end-to-end inside jumbo-enabled datacenter and cloud VPC fabrics, so the sender need not share the victim's L2 segment.\nAC:L - On an affected host (Broadcom NetXtreme NIC, jumbo MTU, multi-buffer XDP program returning XDP_PASS) every oversized packet deterministically produces the wrong truesize \u2014 the upstream reproducer is a single `ping -s 65000`. There is no race to win and no memory-layout condition outside the attacker's control.\nPR:N - The vulnerable code executes in softirq/NAPI context on raw received frames, long before any socket lookup, authentication, or capability check. An unauthenticated attacker with no account on the target simply emits packets.\nUI:N - No victim action is needed at attack time; the XDP program and jumbo MTU are pre-existing deployment configuration, not interaction solicited from a user. Packet arrival alone drives the entire path.\nS:U - The miscounted truesize corrupts skb and socket memory accounting within the same kernel security authority that owns the RX path. No VM, container, or IOMMU boundary is crossed.\nC:N - Only the truesize accounting field is wrong; skb->frags[] and xdp_frags_size retain their correct values, so no out-of-bounds or uninitialized memory is read or exposed to userspace. Nothing is disclosed to the attacker.\nI:N - There is no out-of-bounds write, type confusion, or control-flow corruption \u2014 the erroneous value only skews internal memory-accounting counters, whose consequence is availability rather than data modification.\nA:H - The under-counted truesize trips WARN_ON_ONCE(delta < len) in skb_try_coalesce() during IP reassembly, which is an immediate kernel panic on the panic_on_warn configurations common in cloud and hardened fleets. Even without panic_on_warn, sk_rmem_alloc/sk_forward_alloc and the IP-defrag memory limit are under-charged by roughly the frag count, letting a remote flood pin several times the configured buffer memory and drive the system to OOM."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/broadcom/bnxt/bnxt.c", "drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c"], "versions": [{"version": "1dc4c557bfedfcdf7fc0c46795857773b7ad66e7", "lessThan": "01492e94a823c50f4ab5084e3ac210ba981133be", "status": "affected", "versionType": "git"}, {"version": "1dc4c557bfedfcdf7fc0c46795857773b7ad66e7", "lessThan": "924ef5959b7cfbee8f923a77b0ad19b5f0a4d526", "status": "affected", "versionType": "git"}, {"version": "1dc4c557bfedfcdf7fc0c46795857773b7ad66e7", "lessThan": "19107e71be330dbccb9f8f9f4cf0a9abeadad802", "status": "affected", "versionType": "git"}, {"version": "1dc4c557bfedfcdf7fc0c46795857773b7ad66e7", "lessThan": "b4679807c6083ade4d47f03f80da891afcb6ef62", "status": "affected", "versionType": "git"}, {"version": "1dc4c557bfedfcdf7fc0c46795857773b7ad66e7", "lessThan": "9f7b2aa5034e24d3c49db73d5f760c0435fe31c2", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/broadcom/bnxt/bnxt.c", "drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c"], "versions": [{"version": "5.19", "status": "affected"}, {"version": "0", "lessThan": "5.19", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.20", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.13.8", "lessThanOrEqual": "6.13.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.14", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.12.20"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.13.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.14"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/01492e94a823c50f4ab5084e3ac210ba981133be"}, {"url": "https://git.kernel.org/stable/c/924ef5959b7cfbee8f923a77b0ad19b5f0a4d526"}, {"url": "https://git.kernel.org/stable/c/19107e71be330dbccb9f8f9f4cf0a9abeadad802"}, {"url": "https://git.kernel.org/stable/c/b4679807c6083ade4d47f03f80da891afcb6ef62"}, {"url": "https://git.kernel.org/stable/c/9f7b2aa5034e24d3c49db73d5f760c0435fe31c2"}], "title": "eth: bnxt: fix truesize for mb-xdp-pass case", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "lang": "en", "description": "CWE-noinfo Not enough information"}]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2025-10-01T17:15:46.557576Z", "id": "CVE-2025-21961", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T17:15:48.731Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2025-21961", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2025-10-01T17:15:46.557576Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "description": "CWE-noinfo Not enough information"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T14:38:29.384Z"}}], "cna": {"title": "eth: bnxt: fix truesize for mb-xdp-pass case", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 7.5, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}, "scenarios": [{"lang": "en", "value": "AV:N - The bug is triggered entirely by an inbound Ethernet frame processed in the bnxt_en NAPI receive path (bnxt_rx_pkt \u2192 bnxt_xdp_build_skb), with the splat landing in ip_defrag()/skb_try_coalesce(); no local access to the target is required. Jumbo/multi-buffer frames are routable end-to-end inside jumbo-enabled datacenter and cloud VPC fabrics, so the sender need not share the victim's L2 segment.\nAC:L - On an affected host (Broadcom NetXtreme NIC, jumbo MTU, multi-buffer XDP program returning XDP_PASS) every oversized packet deterministically produces the wrong truesize \u2014 the upstream reproducer is a single `ping -s 65000`. There is no race to win and no memory-layout condition outside the attacker's control.\nPR:N - The vulnerable code executes in softirq/NAPI context on raw received frames, long before any socket lookup, authentication, or capability check. An unauthenticated attacker with no account on the target simply emits packets.\nUI:N - No victim action is needed at attack time; the XDP program and jumbo MTU are pre-existing deployment configuration, not interaction solicited from a user. Packet arrival alone drives the entire path.\nS:U - The miscounted truesize corrupts skb and socket memory accounting within the same kernel security authority that owns the RX path. No VM, container, or IOMMU boundary is crossed.\nC:N - Only the truesize accounting field is wrong; skb->frags[] and xdp_frags_size retain their correct values, so no out-of-bounds or uninitialized memory is read or exposed to userspace. Nothing is disclosed to the attacker.\nI:N - There is no out-of-bounds write, type confusion, or control-flow corruption \u2014 the erroneous value only skews internal memory-accounting counters, whose consequence is availability rather than data modification.\nA:H - The under-counted truesize trips WARN_ON_ONCE(delta < len) in skb_try_coalesce() during IP reassembly, which is an immediate kernel panic on the panic_on_warn configurations common in cloud and hardened fleets. Even without panic_on_warn, sk_rmem_alloc/sk_forward_alloc and the IP-defrag memory limit are under-charged by roughly the frag count, letting a remote flood pin several times the configured buffer memory and drive the system to OOM."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "1dc4c557bfedfcdf7fc0c46795857773b7ad66e7", "lessThan": "01492e94a823c50f4ab5084e3ac210ba981133be", "versionType": "git"}, {"status": "affected", "version": "1dc4c557bfedfcdf7fc0c46795857773b7ad66e7", "lessThan": "924ef5959b7cfbee8f923a77b0ad19b5f0a4d526", "versionType": "git"}, {"status": "affected", "version": "1dc4c557bfedfcdf7fc0c46795857773b7ad66e7", "lessThan": "19107e71be330dbccb9f8f9f4cf0a9abeadad802", "versionType": "git"}, {"status": "affected", "version": "1dc4c557bfedfcdf7fc0c46795857773b7ad66e7", "lessThan": "b4679807c6083ade4d47f03f80da891afcb6ef62", "versionType": "git"}, {"status": "affected", "version": "1dc4c557bfedfcdf7fc0c46795857773b7ad66e7", "lessThan": "9f7b2aa5034e24d3c49db73d5f760c0435fe31c2", "versionType": "git"}], "programFiles": ["drivers/net/ethernet/broadcom/bnxt/bnxt.c", "drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.19"}, {"status": "unaffected", "version": "0", "lessThan": "5.19", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.191", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.160", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.20", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.13.8", "versionType": "semver", "lessThanOrEqual": "6.13.*"}, {"status": "unaffected", "version": "6.14", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/net/ethernet/broadcom/bnxt/bnxt.c", "drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/01492e94a823c50f4ab5084e3ac210ba981133be"}, {"url": "https://git.kernel.org/stable/c/924ef5959b7cfbee8f923a77b0ad19b5f0a4d526"}, {"url": "https://git.kernel.org/stable/c/19107e71be330dbccb9f8f9f4cf0a9abeadad802"}, {"url": "https://git.kernel.org/stable/c/b4679807c6083ade4d47f03f80da891afcb6ef62"}, {"url": "https://git.kernel.org/stable/c/9f7b2aa5034e24d3c49db73d5f760c0435fe31c2"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\neth: bnxt: fix truesize for mb-xdp-pass case\n\nWhen mb-xdp is set and return is XDP_PASS, packet is converted from\nxdp_buff to sk_buff with xdp_update_skb_shared_info() in\nbnxt_xdp_build_skb().\nbnxt_xdp_build_skb() passes incorrect truesize argument to\nxdp_update_skb_shared_info().\nThe truesize is calculated as BNXT_RX_PAGE_SIZE * sinfo->nr_frags but\nthe skb_shared_info was wiped by napi_build_skb() before.\nSo it stores sinfo->nr_frags before bnxt_xdp_build_skb() and use it\ninstead of getting skb_shared_info from xdp_get_shared_info_from_buff().\n\nSplat looks like:\n ------------[ cut here ]------------\n WARNING: CPU: 2 PID: 0 at net/core/skbuff.c:6072 skb_try_coalesce+0x504/0x590\n Modules linked in: xt_nat xt_tcpudp veth af_packet xt_conntrack nft_chain_nat xt_MASQUERADE nf_conntrack_netlink xfrm_user xt_addrtype nft_coms\n CPU: 2 UID: 0 PID: 0 Comm: swapper/2 Not tainted 6.14.0-rc2+ #3\n RIP: 0010:skb_try_coalesce+0x504/0x590\n Code: 4b fd ff ff 49 8b 34 24 40 80 e6 40 0f 84 3d fd ff ff 49 8b 74 24 48 40 f6 c6 01 0f 84 2e fd ff ff 48 8d 4e ff e9 25 fd ff ff <0f> 0b e99\n RSP: 0018:ffffb62c4120caa8 EFLAGS: 00010287\n RAX: 0000000000000003 RBX: ffffb62c4120cb14 RCX: 0000000000000ec0\n RDX: 0000000000001000 RSI: ffffa06e5d7dc000 RDI: 0000000000000003\n RBP: ffffa06e5d7ddec0 R08: ffffa06e6120a800 R09: ffffa06e7a119900\n R10: 0000000000002310 R11: ffffa06e5d7dcec0 R12: ffffe4360575f740\n R13: ffffe43600000000 R14: 0000000000000002 R15: 0000000000000002\n FS: 0000000000000000(0000) GS:ffffa0755f700000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 00007f147b76b0f8 CR3: 00000001615d4000 CR4: 00000000007506f0\n PKRU: 55555554\n Call Trace:\n <IRQ>\n ? __warn+0x84/0x130\n ? skb_try_coalesce+0x504/0x590\n ? report_bug+0x18a/0x1a0\n ? handle_bug+0x53/0x90\n ? exc_invalid_op+0x14/0x70\n ? asm_exc_invalid_op+0x16/0x20\n ? skb_try_coalesce+0x504/0x590\n inet_frag_reasm_finish+0x11f/0x2e0\n ip_defrag+0x37a/0x900\n ip_local_deliver+0x51/0x120\n ip_sublist_rcv_finish+0x64/0x70\n ip_sublist_rcv+0x179/0x210\n ip_list_rcv+0xf9/0x130\n\nHow to reproduce:\n<Node A>\nip link set $interface1 xdp obj xdp_pass.o\nip link set $interface1 mtu 9000 up\nip a a 10.0.0.1/24 dev $interface1\n<Node B>\nip link set $interfac2 mtu 9000 up\nip a a 10.0.0.2/24 dev $interface2\nping 10.0.0.1 -s 65000\n\nFollowing ping.py patch adds xdp-mb-pass case. so ping.py is going to be\nable to reproduce this issue."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.191", "versionStartIncluding": "5.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.160", "versionStartIncluding": "5.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.20", "versionStartIncluding": "5.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.13.8", "versionStartIncluding": "5.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.14", "versionStartIncluding": "5.19"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:21:03.937Z"}}}, "cveMetadata": {"cveId": "CVE-2025-21961", "state": "PUBLISHED", "dateUpdated": "2026-10-30T12:21:03.937Z", "dateReserved": "2024-12-29T08:45:45.795Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-04-01T15:46:58.795Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/ethernet/broadcom/bnxt/bnxt.c", "drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "01492e94a823c50f4ab5084e3ac210ba981133be", "status": "affected", "version": "1dc4c557bfedfcdf7fc0c46795857773b7ad66e7", "versionType": "git"}, {"lessThan": "924ef5959b7cfbee8f923a77b0ad19b5f0a4d526", "status": "affected", "version": "1dc4c557bfedfcdf7fc0c46795857773b7ad66e7", "versionType": "git"}, {"lessThan": "19107e71be330dbccb9f8f9f4cf0a9abeadad802", "status": "affected", "version": "1dc4c557bfedfcdf7fc0c46795857773b7ad66e7", "versionType": "git"}, {"lessThan": "b4679807c6083ade4d47f03f80da891afcb6ef62", "status": "affected", "version": "1dc4c557bfedfcdf7fc0c46795857773b7ad66e7", "versionType": "git"}, {"lessThan": "9f7b2aa5034e24d3c49db73d5f760c0435fe31c2", "status": "affected", "version": "1dc4c557bfedfcdf7fc0c46795857773b7ad66e7", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/ethernet/broadcom/bnxt/bnxt.c", "drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.19"}, {"lessThan": "5.19", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.20", "versionType": "semver"}, {"lessThanOrEqual": "6.13.*", "status": "unaffected", "version": "6.13.8", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.14", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "B1170862-E3A2-4452-B8A3-EB09329034E5", "versionEndExcluding": "6.12.20", "versionStartIncluding": "5.19", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "0A20D4D7-B329-4C68-B662-76062EA7DCF0", "versionEndExcluding": "6.13.8", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:*", "matchCriteriaId": "186716B6-2B66-4BD0-852E-D48E71C0C85F", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*", "matchCriteriaId": "0D3E781C-403A-498F-9DA9-ECEE50F41E75", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.14:rc3:*:*:*:*:*:*", "matchCriteriaId": "66619FB8-0AAF-4166-B2CF-67B24143261D", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.14:rc4:*:*:*:*:*:*", "matchCriteriaId": "D3D6550E-6679-4560-902D-AF52DCFE905B", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.14:rc5:*:*:*:*:*:*", "matchCriteriaId": "45B90F6B-BEC7-4D4E-883A-9DBADE021750", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.14:rc6:*:*:*:*:*:*", "matchCriteriaId": "1759FFB7-531C-41B1-9AE1-FD3D80E0D920", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\neth: bnxt: fix truesize for mb-xdp-pass case\n\nWhen mb-xdp is set and return is XDP_PASS, packet is converted from\nxdp_buff to sk_buff with xdp_update_skb_shared_info() in\nbnxt_xdp_build_skb().\nbnxt_xdp_build_skb() passes incorrect truesize argument to\nxdp_update_skb_shared_info().\nThe truesize is calculated as BNXT_RX_PAGE_SIZE * sinfo->nr_frags but\nthe skb_shared_info was wiped by napi_build_skb() before.\nSo it stores sinfo->nr_frags before bnxt_xdp_build_skb() and use it\ninstead of getting skb_shared_info from xdp_get_shared_info_from_buff().\n\nSplat looks like:\n ------------[ cut here ]------------\n WARNING: CPU: 2 PID: 0 at net/core/skbuff.c:6072 skb_try_coalesce+0x504/0x590\n Modules linked in: xt_nat xt_tcpudp veth af_packet xt_conntrack nft_chain_nat xt_MASQUERADE nf_conntrack_netlink xfrm_user xt_addrtype nft_coms\n CPU: 2 UID: 0 PID: 0 Comm: swapper/2 Not tainted 6.14.0-rc2+ #3\n RIP: 0010:skb_try_coalesce+0x504/0x590\n Code: 4b fd ff ff 49 8b 34 24 40 80 e6 40 0f 84 3d fd ff ff 49 8b 74 24 48 40 f6 c6 01 0f 84 2e fd ff ff 48 8d 4e ff e9 25 fd ff ff <0f> 0b e99\n RSP: 0018:ffffb62c4120caa8 EFLAGS: 00010287\n RAX: 0000000000000003 RBX: ffffb62c4120cb14 RCX: 0000000000000ec0\n RDX: 0000000000001000 RSI: ffffa06e5d7dc000 RDI: 0000000000000003\n RBP: ffffa06e5d7ddec0 R08: ffffa06e6120a800 R09: ffffa06e7a119900\n R10: 0000000000002310 R11: ffffa06e5d7dcec0 R12: ffffe4360575f740\n R13: ffffe43600000000 R14: 0000000000000002 R15: 0000000000000002\n FS: 0000000000000000(0000) GS:ffffa0755f700000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 00007f147b76b0f8 CR3: 00000001615d4000 CR4: 00000000007506f0\n PKRU: 55555554\n Call Trace:\n <IRQ>\n ? __warn+0x84/0x130\n ? skb_try_coalesce+0x504/0x590\n ? report_bug+0x18a/0x1a0\n ? handle_bug+0x53/0x90\n ? exc_invalid_op+0x14/0x70\n ? asm_exc_invalid_op+0x16/0x20\n ? skb_try_coalesce+0x504/0x590\n inet_frag_reasm_finish+0x11f/0x2e0\n ip_defrag+0x37a/0x900\n ip_local_deliver+0x51/0x120\n ip_sublist_rcv_finish+0x64/0x70\n ip_sublist_rcv+0x179/0x210\n ip_list_rcv+0xf9/0x130\n\nHow to reproduce:\n<Node A>\nip link set $interface1 xdp obj xdp_pass.o\nip link set $interface1 mtu 9000 up\nip a a 10.0.0.1/24 dev $interface1\n<Node B>\nip link set $interfac2 mtu 9000 up\nip a a 10.0.0.2/24 dev $interface2\nping 10.0.0.1 -s 65000\n\nFollowing ping.py patch adds xdp-mb-pass case. so ping.py is going to be\nable to reproduce this issue."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: eth: bnxt: correcci\u00f3n de truesize para el caso mb-xdp-pass. Cuando mb-xdp est\u00e1 configurado y el valor de retorno es XDP_PASS, el paquete se convierte de xdp_buff a sk_buff con xdp_update_skb_shared_info() en bnxt_xdp_build_skb(). bnxt_xdp_build_skb() pasa un argumento truesize incorrecto a xdp_update_skb_shared_info(). El truesize se calcula como BNXT_RX_PAGE_SIZE * sinfo-&gt;nr_frags, pero napi_build_skb() borr\u00f3 previamente skb_shared_info. De este modo, almacena sinfo-&gt;nr_frags antes de bnxt_xdp_build_skb() y lo utiliza en lugar de obtener skb_shared_info de xdp_get_shared_info_from_buff(). El splat se ve as\u00ed: ------------[ cortar aqu\u00ed ]------------ ADVERTENCIA: CPU: 2 PID: 0 en net/core/skbuff.c:6072 skb_try_coalesce+0x504/0x590 M\u00f3dulos enlazados en: xt_nat xt_tcpudp veth af_packet xt_conntrack nft_chain_nat xt_MASQUERADE nf_conntrack_netlink xfrm_user xt_addrtype nft_coms CPU: 2 UID: 0 PID: 0 Comm: swapper/2 No contaminado 6.14.0-rc2+ #3 RIP: 0010:skb_try_coalesce+0x504/0x590 C\u00f3digo: 4b fd ff ff 49 8b 34 24 40 80 e6 40 0f 84 3d fd ff ff 49 8b 74 24 48 40 f6 c6 01 0f 84 2e fd ff ff 48 8d 4e ff e9 25 fd ff ff &lt;0f&gt; 0b e99 RSP: 0018:ffffb62c4120caa8 EFLAGS: 00010287 RAX: 000000000000003 RBX: ffffb62c4120cb14 RCX: 0000000000000ec0 RDX: 0000000000001000 RSI: ffffa06e5d7dc000 RDI: 000000000000003 RBP: ffffa06e5d7ddec0 R08: ffffa06e6120a800 R09: ffffa06e7a119900 R10: 0000000000002310 R11: ffffa06e5d7dcec0 R12: ffffe4360575f740 R13: ffffe43600000000 R14: 000000000000002 R15: 0000000000000002 FS: 000000000000000(0000) GS:ffffa0755f700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f147b76b0f8 CR3: 00000001615d4000 CR4: 00000000007506f0 PKRU: 55555554 Rastreo de llamadas: ? __warn+0x84/0x130 ? skb_try_coalesce+0x504/0x590 ? report_bug+0x18a/0x1a0 ? handle_bug+0x53/0x90 ? exc_invalid_op+0x14/0x70 ? asm_exc_invalid_op+0x16/0x20 ? skb_try_coalesce+0x504/0x590 inet_frag_reasm_finish+0x11f/0x2e0 ip_defrag+0x37a/0x900 ip_local_deliver+0x51/0x120 ip_sublist_rcv_finish+0x64/0x70 ip_sublist_rcv+0x179/0x210 ip_list_rcv+0xf9/0x130 C\u00f3mo reproducir: enlace ip establecido $interfaz1 xdp obj xdp_pass.o enlace ip establecido $interfaz1 mtu 9000 activo ip aa 10.0.0.1/24 dev $interfaz1 enlace ip establecido $interfaz2 mtu 9000 activo ip aa 10.0.0.2/24 El siguiente parche de ping.py agrega el caso xdp-mb-pass, por lo que ping.py podr\u00e1 reproducir este problema."}], "id": "CVE-2025-21961", "lastModified": "2026-10-30T13:17:54.750", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-21961", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-10-01T17:15:46.557576Z", "version": "2.0.3"}}]}, "published": "2025-04-01T16:15:27.343", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/01492e94a823c50f4ab5084e3ac210ba981133be"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/19107e71be330dbccb9f8f9f4cf0a9abeadad802"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/924ef5959b7cfbee8f923a77b0ad19b5f0a4d526"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9f7b2aa5034e24d3c49db73d5f760c0435fe31c2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b4679807c6083ade4d47f03f80da891afcb6ef62"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2025:9896", "cpe": "cpe:/o:redhat:enterprise_linux:10.0", "package": "kernel-0:6.12.0-55.19.1.el10_0", "product_name": "Red Hat Enterprise Linux 10", "release_date": "2025-06-30T00:00:00Z"}, {"advisory": "RHSA-2025:9080", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-570.22.1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-06-16T00:00:00Z"}, {"advisory": "RHSA-2025:9080", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-570.22.1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-06-16T00:00:00Z"}], "bugzilla": {"description": "kernel: eth: bnxt: fix truesize for mb-xdp-pass case", "id": "2356584", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2356584"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-665", "details": ["In the Linux kernel, the following vulnerability has been resolved:\neth: bnxt: fix truesize for mb-xdp-pass case\nWhen mb-xdp is set and return is XDP_PASS, packet is converted from\nxdp_buff to sk_buff with xdp_update_skb_shared_info() in\nbnxt_xdp_build_skb().\nbnxt_xdp_build_skb() passes incorrect truesize argument to\nxdp_update_skb_shared_info().\nThe truesize is calculated as BNXT_RX_PAGE_SIZE * sinfo->nr_frags but\nthe skb_shared_info was wiped by napi_build_skb() before.\nSo it stores sinfo->nr_frags before bnxt_xdp_build_skb() and use it\ninstead of getting skb_shared_info from xdp_get_shared_info_from_buff().\nSplat looks like:\n------------[ cut here ]------------\nWARNING: CPU: 2 PID: 0 at net/core/skbuff.c:6072 skb_try_coalesce+0x504/0x590\nModules linked in: xt_nat xt_tcpudp veth af_packet xt_conntrack nft_chain_nat xt_MASQUERADE nf_conntrack_netlink xfrm_user xt_addrtype nft_coms\nCPU: 2 UID: 0 PID: 0 Comm: swapper/2 Not tainted 6.14.0-rc2+ #3\nRIP: 0010:skb_try_coalesce+0x504/0x590\nCode: 4b fd ff ff 49 8b 34 24 40 80 e6 40 0f 84 3d fd ff ff 49 8b 74 24 48 40 f6 c6 01 0f 84 2e fd ff ff 48 8d 4e ff e9 25 fd ff ff <0f> 0b e99\nRSP: 0018:ffffb62c4120caa8 EFLAGS: 00010287\nRAX: 0000000000000003 RBX: ffffb62c4120cb14 RCX: 0000000000000ec0\nRDX: 0000000000001000 RSI: ffffa06e5d7dc000 RDI: 0000000000000003\nRBP: ffffa06e5d7ddec0 R08: ffffa06e6120a800 R09: ffffa06e7a119900\nR10: 0000000000002310 R11: ffffa06e5d7dcec0 R12: ffffe4360575f740\nR13: ffffe43600000000 R14: 0000000000000002 R15: 0000000000000002\nFS: 0000000000000000(0000) GS:ffffa0755f700000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f147b76b0f8 CR3: 00000001615d4000 CR4: 00000000007506f0\nPKRU: 55555554\nCall Trace:\n<IRQ>\n? __warn+0x84/0x130\n? skb_try_coalesce+0x504/0x590\n? report_bug+0x18a/0x1a0\n? handle_bug+0x53/0x90\n? exc_invalid_op+0x14/0x70\n? asm_exc_invalid_op+0x16/0x20\n? skb_try_coalesce+0x504/0x590\ninet_frag_reasm_finish+0x11f/0x2e0\nip_defrag+0x37a/0x900\nip_local_deliver+0x51/0x120\nip_sublist_rcv_finish+0x64/0x70\nip_sublist_rcv+0x179/0x210\nip_list_rcv+0xf9/0x130\nHow to reproduce:\n<Node A>\nip link set $interface1 xdp obj xdp_pass.o\nip link set $interface1 mtu 9000 up\nip a a 10.0.0.1/24 dev $interface1\n<Node B>\nip link set $interfac2 mtu 9000 up\nip a a 10.0.0.2/24 dev $interface2\nping 10.0.0.1 -s 65000\nFollowing ping.py patch adds xdp-mb-pass case. so ping.py is going to be\nable to reproduce this issue."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, prevent module bnxt_en from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically."}, "name": "CVE-2025-21961", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-04-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-21961\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-21961\nhttps://lore.kernel.org/linux-cve-announce/2025040144-CVE-2025-21961-5759@gregkh/T"], "threat_severity": "Moderate"}

{}