CVE-2026-98382

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98382", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.345Z", "datePublished": "2026-10-09T07:34:21.718Z", "dateUpdated": "2026-10-24T14:08:39.904Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-24T14:08:39.904Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject dev-bound-only programs on other devices\n\n__bpf_offload_dev_match() falls back to comparing offdev pointers after an\nexact netdev mismatch. Bound-only programs normally have NULL offdevs, so\nunrelated netdevs compare equal. A bound-only program on an\noffload-registered netdev can instead inherit a real offdev and match a\nsibling port. With CAP_BPF and CAP_NET_ADMIN, a caller can use\nbpf(BPF_LINK_CREATE) with a different target ifindex to run metadata kfuncs\nspecialized for the bound driver on the target driver's xdp_buff. Running a\nveth-bound program on tun reads beyond tun's bare stack xdp_buff as a\nveth_xdp_buff.\n\n Oops: general protection fault, probably for non-canonical address\n KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]\n RIP: 0010:veth_xdp_rx_timestamp (drivers/net/veth.c:1673)\n Call Trace:\n ...\n tun_build_skb (drivers/net/tun.c:1739)\n tun_get_user (drivers/net/tun.c:1856)\n tun_chr_write_iter (drivers/net/tun.c:2091)\n vfs_write (fs/read_write.c:595 fs/read_write.c:687)\n ksys_write (fs/read_write.c:739)\n do_syscall_64 (arch/x86/entry/syscall_64.c:84)\n entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)\n Kernel panic - not syncing: Fatal exception in interrupt\n\nRestrict non-offloaded programs to exact netdev matches and retain the\nshared-offdev fallback only for genuinely offloaded multi-port programs."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - bpf(BPF_LINK_CREATE) reaches link_create(), bpf_xdp_link_attach(), dev_xdp_install(), and patched __bpf_offload_dev_match(), which accepts a program whose prog_ifindex names another local netdev; no network protocol carries the mismatched ifindex.\nAC:L - The attacker can bind programs to both veth and tun to create their NULL-offdev entries, attach the veth-bound program to tun, and write a packet through tun_chr_write_iter(); the mismatch is deterministic and requires no race or external device state.\nPR:L - bpf_prog_load() requires bpf_token_capable() for CAP_BPF and CAP_NET_ADMIN, which BPF-token delegation can satisfy in a user namespace; tun_set_iff() checks CAP_NET_ADMIN against net->user_ns, permitting this path in delegated container deployments.\nUI:N - The attacker creates the devices, loads and attaches both programs, and triggers execution by writing to their own tun file descriptor; no victim action is involved.\nS:U - The incorrectly specialized metadata kfunc dereferences and can modify memory inside the same host kernel executing the XDP program; no VM, IOMMU, or other separate security authority is crossed.\nC:H - bpf_dev_bound_resolve_kfunc() specializes the call to veth_xdp_rx_timestamp(), which casts tun's bare stack xdp_buff to veth_xdp_buff, treats the adjacent word as an skb pointer, and returns skb_hwtstamps()->hwtstamp to the BPF program, providing an unbounded kernel-read primitive.\nI:H - veth_xdp_rx_hash() passes the same bogus skb pointer to skb_get_hash(); when no hash is present, __skb_get_hash_net() calls __skb_set_sw_hash() and writes hash, l4_hash, and sw_hash through that attacker-influenceable pointer.\nA:H - tun_build_skb() runs the mismatched program from tun_chr_write_iter(), and the demonstrated veth_xdp_rx_timestamp() invalid dereference produces a general-protection fault followed by a kernel panic."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/bpf/offload.c"], "versions": [{"version": "2b3486bc2d237ec345b3942b7be5deabf8c8fed1", "lessThan": "e57f04194361574493e3e6cf0b9e9c69e4ae9791", "status": "affected", "versionType": "git"}, {"version": "2b3486bc2d237ec345b3942b7be5deabf8c8fed1", "lessThan": "0dceda331180617aeeb22381e8480b37f18ba08b", "status": "affected", "versionType": "git"}, {"version": "2b3486bc2d237ec345b3942b7be5deabf8c8fed1", "lessThan": "940b626854de200e6187777d42114727daca617c", "status": "affected", "versionType": "git"}, {"version": "2b3486bc2d237ec345b3942b7be5deabf8c8fed1", "lessThan": "bb375f3c5990e29851894f20ebc4b9dbc6676126", "status": "affected", "versionType": "git"}, {"version": "2b3486bc2d237ec345b3942b7be5deabf8c8fed1", "lessThan": "6db1ce73e9853f533eb7f413f14ba00f8ec6f80d", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/bpf/offload.c"], "versions": [{"version": "6.3", "status": "affected"}, {"version": "0", "lessThan": "6.3", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.112", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.55", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.9", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "6.3", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.12.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.18.55"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "7.2.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/e57f04194361574493e3e6cf0b9e9c69e4ae9791"}, {"url": "https://git.kernel.org/stable/c/0dceda331180617aeeb22381e8480b37f18ba08b"}, {"url": "https://git.kernel.org/stable/c/940b626854de200e6187777d42114727daca617c"}, {"url": "https://git.kernel.org/stable/c/bb375f3c5990e29851894f20ebc4b9dbc6676126"}, {"url": "https://git.kernel.org/stable/c/6db1ce73e9853f533eb7f413f14ba00f8ec6f80d"}], "title": "bpf: Reject dev-bound-only programs on other devices", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["kernel/bpf/offload.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "e57f04194361574493e3e6cf0b9e9c69e4ae9791", "status": "affected", "version": "2b3486bc2d237ec345b3942b7be5deabf8c8fed1", "versionType": "git"}, {"lessThan": "0dceda331180617aeeb22381e8480b37f18ba08b", "status": "affected", "version": "2b3486bc2d237ec345b3942b7be5deabf8c8fed1", "versionType": "git"}, {"lessThan": "940b626854de200e6187777d42114727daca617c", "status": "affected", "version": "2b3486bc2d237ec345b3942b7be5deabf8c8fed1", "versionType": "git"}, {"lessThan": "bb375f3c5990e29851894f20ebc4b9dbc6676126", "status": "affected", "version": "2b3486bc2d237ec345b3942b7be5deabf8c8fed1", "versionType": "git"}, {"lessThan": "6db1ce73e9853f533eb7f413f14ba00f8ec6f80d", "status": "affected", "version": "2b3486bc2d237ec345b3942b7be5deabf8c8fed1", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["kernel/bpf/offload.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.3"}, {"lessThan": "6.3", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.158", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.112", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.55", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.9", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject dev-bound-only programs on other devices\n\n__bpf_offload_dev_match() falls back to comparing offdev pointers after an\nexact netdev mismatch. Bound-only programs normally have NULL offdevs, so\nunrelated netdevs compare equal. A bound-only program on an\noffload-registered netdev can instead inherit a real offdev and match a\nsibling port. With CAP_BPF and CAP_NET_ADMIN, a caller can use\nbpf(BPF_LINK_CREATE) with a different target ifindex to run metadata kfuncs\nspecialized for the bound driver on the target driver's xdp_buff. Running a\nveth-bound program on tun reads beyond tun's bare stack xdp_buff as a\nveth_xdp_buff.\n\n Oops: general protection fault, probably for non-canonical address\n KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]\n RIP: 0010:veth_xdp_rx_timestamp (drivers/net/veth.c:1673)\n Call Trace:\n ...\n tun_build_skb (drivers/net/tun.c:1739)\n tun_get_user (drivers/net/tun.c:1856)\n tun_chr_write_iter (drivers/net/tun.c:2091)\n vfs_write (fs/read_write.c:595 fs/read_write.c:687)\n ksys_write (fs/read_write.c:739)\n do_syscall_64 (arch/x86/entry/syscall_64.c:84)\n entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)\n Kernel panic - not syncing: Fatal exception in interrupt\n\nRestrict non-offloaded programs to exact netdev matches and retain the\nshared-offdev fallback only for genuinely offloaded multi-port programs."}], "id": "CVE-2026-98382", "lastModified": "2026-10-24T14:16:40.200", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-10-09T08:16:56.680", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0dceda331180617aeeb22381e8480b37f18ba08b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6db1ce73e9853f533eb7f413f14ba00f8ec6f80d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/940b626854de200e6187777d42114727daca617c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bb375f3c5990e29851894f20ebc4b9dbc6676126"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e57f04194361574493e3e6cf0b9e9c69e4ae9791"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: bpf: Reject dev-bound-only programs on other devices", "id": "2548396", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2548396"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbpf: Reject dev-bound-only programs on other devices\n__bpf_offload_dev_match() falls back to comparing offdev pointers after an\nexact netdev mismatch. Bound-only programs normally have NULL offdevs, so\nunrelated netdevs compare equal. A bound-only program on an\noffload-registered netdev can instead inherit a real offdev and match a\nsibling port. With CAP_BPF and CAP_NET_ADMIN, a caller can use\nbpf(BPF_LINK_CREATE) with a different target ifindex to run metadata kfuncs\nspecialized for the bound driver on the target driver's xdp_buff. Running a\nveth-bound program on tun reads beyond tun's bare stack xdp_buff as a\nveth_xdp_buff.\nOops: general protection fault, probably for non-canonical address\nKASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]\nRIP: 0010:veth_xdp_rx_timestamp (drivers/net/veth.c:1673)\nCall Trace:\n...\ntun_build_skb (drivers/net/tun.c:1739)\ntun_get_user (drivers/net/tun.c:1856)\ntun_chr_write_iter (drivers/net/tun.c:2091)\nvfs_write (fs/read_write.c:595 fs/read_write.c:687)\nksys_write (fs/read_write.c:739)\ndo_syscall_64 (arch/x86/entry/syscall_64.c:84)\nentry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)\nKernel panic - not syncing: Fatal exception in interrupt\nRestrict non-offloaded programs to exact netdev matches and retain the\nshared-offdev fallback only for genuinely offloaded multi-port programs.", "A flaw was found in the Linux kernel's BPF (Berkeley Packet Filter) subsystem. This vulnerability allows a privileged local user to cause a Denial of Service (DoS) by triggering an out-of-bounds memory read. When handling device-bound programs, improper validation allows a program intended for one network device to attach to an incompatible device. This mismatch causes driver-specific functions to read memory beyond allocated buffer boundaries, resulting in a kernel panic and system crash."], "name": "CVE-2026-98382", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "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", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-09T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98382\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98382\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98382.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2b3486bc2d237ec345b3942b7be5deabf8c8fed1,e57f04194361574493e3e6cf0b9e9c69e4ae9791)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2b3486bc2d237ec345b3942b7be5deabf8c8fed1,0dceda331180617aeeb22381e8480b37f18ba08b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2b3486bc2d237ec345b3942b7be5deabf8c8fed1,940b626854de200e6187777d42114727daca617c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2b3486bc2d237ec345b3942b7be5deabf8c8fed1,bb375f3c5990e29851894f20ebc4b9dbc6676126)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2b3486bc2d237ec345b3942b7be5deabf8c8fed1,6db1ce73e9853f533eb7f413f14ba00f8ec6f80d)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.3"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.3)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.158,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.112,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.55,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.9,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc5,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-10-09T10:30:05.661304+00:00", "updated": "2026-10-24T16:15:17.882092+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}