CVE-2026-72491

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72491", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.936Z", "datePublished": "2026-08-15T05:57:26.281Z", "dateUpdated": "2026-10-16T18:55:26.515Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:44:52.224Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/9p: fix race condition on rdma->state in trans_rdma.c\n\nThe rdma->state field is modified without holding req_lock in both\nrecv_done() and p9_cm_event_handler(), while rdma_request() accesses\nthe same field under the req_lock spinlock. This inconsistent locking\ncreates a race condition:\n\n- recv_done() running in softirq completion context sets\n rdma->state = P9_RDMA_FLUSHING without acquiring req_lock\n\n- p9_cm_event_handler() modifies rdma->state at multiple points\n (ADDR_RESOLVED, ROUTE_RESOLVED, ESTABLISHED, CLOSED) without\n req_lock\n\n- rdma_request() uses spin_lock_irqsave(&rdma->req_lock, flags) to\n protect the read-modify-write of rdma->state\n\nThe race can cause lost state transitions: recv_done() or the CM\nevent handler could set state to FLUSHING/CLOSED while rdma_request()\nis concurrently checking or modifying state under the lock, leading to\nthe FLUSHING transition being silently overwritten by CLOSING. This\ncorrupts the connection state machine and can cause use-after-free on\nRDMA request objects during teardown.\n\nFix by adding req_lock protection to all rdma->state modifications in\nrecv_done() and p9_cm_event_handler(), matching the pattern already\nused in rdma_request(). Use spin_lock_irqsave/spin_unlock_irqrestore\nin the CM event handler since it can race with recv_done() which runs\nin softirq context.\n\nTested with a kernel module that races two threads (simulating\nrdma_request and recv_done/CM handler) on rdma->state with proper\nlocking: 5.5M+ FLUSHING writes over 27M iterations with 0 lost\ntransitions."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - The 9p RDMA client processes RDMA receive completions and CM disconnect events from the remote peer in recv_done() and p9_cm_event_handler(); a malicious or compromised 9p server over RoCE/iWARP can trigger err_out and concurrent teardown without local access.\nAC:L - The attacker controls both sides of the race by sending malformed 9p RDMA replies to drive recv_done() into err_out while forcing disconnects and concurrent rdma_request() error paths; no uncontrollable memory layout or rare victim state is required.\nPR:N - A remote malicious 9p RDMA server needs no credentials on the victim kernel; HPC clusters and virtio-9p backends with persistent trans=rdma mounts let the server alone time malformed replies against in-flight client requests.\nUI:N - No per-attack victim action is needed on existing 9p RDMA mounts\u2014automated workloads, parallel I/O, and server-initiated RDMA disconnects concurrently reach recv_done() and rdma_request() during normal filesystem operation.\nS:U - Impact is kernel heap corruption and local privilege escalation within the victim kernel security domain; UAF on p9_req_t during RDMA teardown does not cross VM, container, or IOMMU isolation boundaries.\nC:H - Lost FLUSHING state transitions corrupt the connection teardown state machine and cause use-after-free on RDMA request (p9_req_t) objects; UAF provides attacker-influenced freed-heap contents usable for arbitrary kernel memory disclosure.\nI:H - Corrupted rdma->state frees in-flight p9_req_t structures while send_done() and p9_client_cb() still hold references, enabling heap grooming and arbitrary kernel write or control-flow hijack primitives.\nA:H - Use-after-free during RDMA request teardown causes kernel oops or panic when dangling p9_req_t objects are accessed, and state-machine corruption alone can hang or crash the 9p RDMA transport."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/9p/trans_rdma.c"], "versions": [{"version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "lessThan": "4cee2b8766045059d5e0b8114837b4a8efe827ac", "status": "affected", "versionType": "git"}, {"version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "lessThan": "5424138848eb7d7d8a7196676e90a2cbf2142454", "status": "affected", "versionType": "git"}, {"version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "lessThan": "3970a19a80de530b801b6256354d4a529a9a2d6c", "status": "affected", "versionType": "git"}, {"version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "lessThan": "8aadc136d8e8d8fc95d7982d213cfe2234dfcf2b", "status": "affected", "versionType": "git"}, {"version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "lessThan": "151f8cf5b23d8a534d884432a82a6d54d5a61989", "status": "affected", "versionType": "git"}, {"version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "lessThan": "13bf9879b778b2f4b260b45bed18f31806120d1e", "status": "affected", "versionType": "git"}, {"version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "lessThan": "ebbcbe5c0db215feecc17def06178da443f4eea6", "status": "affected", "versionType": "git"}, {"version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "lessThan": "7d54894a1ee265a72d70f7cae1da6cc774cccc71", "status": "affected", "versionType": "git"}, {"version": "3479b3c35e82ed10aa0ca2ee9e78c4eded06ba62", "status": "affected", "versionType": "git"}, {"version": "c01ddaa54d7411e964ffd250c018d8469c5852f2", "status": "affected", "versionType": "git"}, {"version": "9e69c673fe077b8dc491cd8406c9bdcb1f76dee2", "status": "affected", "versionType": "git"}, {"version": "e48e7e27e4dfd00c81e0381e7cee610cce021452", "status": "affected", "versionType": "git"}, {"version": "4.4.185", "lessThan": "4.5", "status": "affected", "versionType": "semver"}, {"version": "4.9.185", "lessThan": "4.10", "status": "affected", "versionType": "semver"}, {"version": "4.14.132", "lessThan": "4.15", "status": "affected", "versionType": "semver"}, {"version": "4.19.57", "lessThan": "4.20", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/9p/trans_rdma.c"], "versions": [{"version": "4.20", "status": "affected"}, {"version": "0", "lessThan": "4.20", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "4.20", "versionEndExcluding": "5.10.261"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "5.15.212"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "7.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4.185"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9.185"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14.132"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19.57"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/4cee2b8766045059d5e0b8114837b4a8efe827ac"}, {"url": "https://git.kernel.org/stable/c/5424138848eb7d7d8a7196676e90a2cbf2142454"}, {"url": "https://git.kernel.org/stable/c/3970a19a80de530b801b6256354d4a529a9a2d6c"}, {"url": "https://git.kernel.org/stable/c/8aadc136d8e8d8fc95d7982d213cfe2234dfcf2b"}, {"url": "https://git.kernel.org/stable/c/151f8cf5b23d8a534d884432a82a6d54d5a61989"}, {"url": "https://git.kernel.org/stable/c/13bf9879b778b2f4b260b45bed18f31806120d1e"}, {"url": "https://git.kernel.org/stable/c/ebbcbe5c0db215feecc17def06178da443f4eea6"}, {"url": "https://git.kernel.org/stable/c/7d54894a1ee265a72d70f7cae1da6cc774cccc71"}], "title": "net/9p: fix race condition on rdma->state in trans_rdma.c", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-72491", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T18:50:50.731501Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T18:55:26.515Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-72491", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T18:50:50.731501Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T18:50:51.287Z"}}], "cna": {"title": "net/9p: fix race condition on rdma->state in trans_rdma.c", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 9.8, "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:N - The 9p RDMA client processes RDMA receive completions and CM disconnect events from the remote peer in recv_done() and p9_cm_event_handler(); a malicious or compromised 9p server over RoCE/iWARP can trigger err_out and concurrent teardown without local access.\nAC:L - The attacker controls both sides of the race by sending malformed 9p RDMA replies to drive recv_done() into err_out while forcing disconnects and concurrent rdma_request() error paths; no uncontrollable memory layout or rare victim state is required.\nPR:N - A remote malicious 9p RDMA server needs no credentials on the victim kernel; HPC clusters and virtio-9p backends with persistent trans=rdma mounts let the server alone time malformed replies against in-flight client requests.\nUI:N - No per-attack victim action is needed on existing 9p RDMA mounts\u2014automated workloads, parallel I/O, and server-initiated RDMA disconnects concurrently reach recv_done() and rdma_request() during normal filesystem operation.\nS:U - Impact is kernel heap corruption and local privilege escalation within the victim kernel security domain; UAF on p9_req_t during RDMA teardown does not cross VM, container, or IOMMU isolation boundaries.\nC:H - Lost FLUSHING state transitions corrupt the connection teardown state machine and cause use-after-free on RDMA request (p9_req_t) objects; UAF provides attacker-influenced freed-heap contents usable for arbitrary kernel memory disclosure.\nI:H - Corrupted rdma->state frees in-flight p9_req_t structures while send_done() and p9_client_cb() still hold references, enabling heap grooming and arbitrary kernel write or control-flow hijack primitives.\nA:H - Use-after-free during RDMA request teardown causes kernel oops or panic when dangling p9_req_t objects are accessed, and state-machine corruption alone can hang or crash the 9p RDMA transport."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "lessThan": "4cee2b8766045059d5e0b8114837b4a8efe827ac", "versionType": "git"}, {"status": "affected", "version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "lessThan": "5424138848eb7d7d8a7196676e90a2cbf2142454", "versionType": "git"}, {"status": "affected", "version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "lessThan": "3970a19a80de530b801b6256354d4a529a9a2d6c", "versionType": "git"}, {"status": "affected", "version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "lessThan": "8aadc136d8e8d8fc95d7982d213cfe2234dfcf2b", "versionType": "git"}, {"status": "affected", "version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "lessThan": "151f8cf5b23d8a534d884432a82a6d54d5a61989", "versionType": "git"}, {"status": "affected", "version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "lessThan": "13bf9879b778b2f4b260b45bed18f31806120d1e", "versionType": "git"}, {"status": "affected", "version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "lessThan": "ebbcbe5c0db215feecc17def06178da443f4eea6", "versionType": "git"}, {"status": "affected", "version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "lessThan": "7d54894a1ee265a72d70f7cae1da6cc774cccc71", "versionType": "git"}, {"status": "affected", "version": "3479b3c35e82ed10aa0ca2ee9e78c4eded06ba62", "versionType": "git"}, {"status": "affected", "version": "c01ddaa54d7411e964ffd250c018d8469c5852f2", "versionType": "git"}, {"status": "affected", "version": "9e69c673fe077b8dc491cd8406c9bdcb1f76dee2", "versionType": "git"}, {"status": "affected", "version": "e48e7e27e4dfd00c81e0381e7cee610cce021452", "versionType": "git"}, {"status": "affected", "version": "4.4.185", "lessThan": "4.5", "versionType": "semver"}, {"status": "affected", "version": "4.9.185", "lessThan": "4.10", "versionType": "semver"}, {"status": "affected", "version": "4.14.132", "lessThan": "4.15", "versionType": "semver"}, {"status": "affected", "version": "4.19.57", "lessThan": "4.20", "versionType": "semver"}], "programFiles": ["net/9p/trans_rdma.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4.20"}, {"status": "unaffected", "version": "0", "lessThan": "4.20", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.261", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.212", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.178", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.145", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.97", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.40", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.5", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/9p/trans_rdma.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/4cee2b8766045059d5e0b8114837b4a8efe827ac"}, {"url": "https://git.kernel.org/stable/c/5424138848eb7d7d8a7196676e90a2cbf2142454"}, {"url": "https://git.kernel.org/stable/c/3970a19a80de530b801b6256354d4a529a9a2d6c"}, {"url": "https://git.kernel.org/stable/c/8aadc136d8e8d8fc95d7982d213cfe2234dfcf2b"}, {"url": "https://git.kernel.org/stable/c/151f8cf5b23d8a534d884432a82a6d54d5a61989"}, {"url": "https://git.kernel.org/stable/c/13bf9879b778b2f4b260b45bed18f31806120d1e"}, {"url": "https://git.kernel.org/stable/c/ebbcbe5c0db215feecc17def06178da443f4eea6"}, {"url": "https://git.kernel.org/stable/c/7d54894a1ee265a72d70f7cae1da6cc774cccc71"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/9p: fix race condition on rdma->state in trans_rdma.c\n\nThe rdma->state field is modified without holding req_lock in both\nrecv_done() and p9_cm_event_handler(), while rdma_request() accesses\nthe same field under the req_lock spinlock. This inconsistent locking\ncreates a race condition:\n\n- recv_done() running in softirq completion context sets\n rdma->state = P9_RDMA_FLUSHING without acquiring req_lock\n\n- p9_cm_event_handler() modifies rdma->state at multiple points\n (ADDR_RESOLVED, ROUTE_RESOLVED, ESTABLISHED, CLOSED) without\n req_lock\n\n- rdma_request() uses spin_lock_irqsave(&rdma->req_lock, flags) to\n protect the read-modify-write of rdma->state\n\nThe race can cause lost state transitions: recv_done() or the CM\nevent handler could set state to FLUSHING/CLOSED while rdma_request()\nis concurrently checking or modifying state under the lock, leading to\nthe FLUSHING transition being silently overwritten by CLOSING. This\ncorrupts the connection state machine and can cause use-after-free on\nRDMA request objects during teardown.\n\nFix by adding req_lock protection to all rdma->state modifications in\nrecv_done() and p9_cm_event_handler(), matching the pattern already\nused in rdma_request(). Use spin_lock_irqsave/spin_unlock_irqrestore\nin the CM event handler since it can race with recv_done() which runs\nin softirq context.\n\nTested with a kernel module that races two threads (simulating\nrdma_request and recv_done/CM handler) on rdma->state with proper\nlocking: 5.5M+ FLUSHING writes over 27M iterations with 0 lost\ntransitions."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.261", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.212", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.178", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.145", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.97", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.40", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.5", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "4.4.185"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "4.9.185"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "4.14.132"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "4.19.57"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:44:52.224Z"}}}, "cveMetadata": {"cveId": "CVE-2026-72491", "state": "PUBLISHED", "dateUpdated": "2026-10-16T18:55:26.515Z", "dateReserved": "2026-08-09T03:40:39.936Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-08-15T05:57:26.281Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/9p/trans_rdma.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "4cee2b8766045059d5e0b8114837b4a8efe827ac", "status": "affected", "version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "versionType": "git"}, {"lessThan": "5424138848eb7d7d8a7196676e90a2cbf2142454", "status": "affected", "version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "versionType": "git"}, {"lessThan": "3970a19a80de530b801b6256354d4a529a9a2d6c", "status": "affected", "version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "versionType": "git"}, {"lessThan": "8aadc136d8e8d8fc95d7982d213cfe2234dfcf2b", "status": "affected", "version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "versionType": "git"}, {"lessThan": "151f8cf5b23d8a534d884432a82a6d54d5a61989", "status": "affected", "version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "versionType": "git"}, {"lessThan": "13bf9879b778b2f4b260b45bed18f31806120d1e", "status": "affected", "version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "versionType": "git"}, {"lessThan": "ebbcbe5c0db215feecc17def06178da443f4eea6", "status": "affected", "version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "versionType": "git"}, {"lessThan": "7d54894a1ee265a72d70f7cae1da6cc774cccc71", "status": "affected", "version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "versionType": "git"}, {"status": "affected", "version": "3479b3c35e82ed10aa0ca2ee9e78c4eded06ba62", "versionType": "git"}, {"status": "affected", "version": "c01ddaa54d7411e964ffd250c018d8469c5852f2", "versionType": "git"}, {"status": "affected", "version": "9e69c673fe077b8dc491cd8406c9bdcb1f76dee2", "versionType": "git"}, {"status": "affected", "version": "e48e7e27e4dfd00c81e0381e7cee610cce021452", "versionType": "git"}, {"lessThan": "4.5", "status": "affected", "version": "4.4.185", "versionType": "semver"}, {"lessThan": "4.10", "status": "affected", "version": "4.9.185", "versionType": "semver"}, {"lessThan": "4.15", "status": "affected", "version": "4.14.132", "versionType": "semver"}, {"lessThan": "4.20", "status": "affected", "version": "4.19.57", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/9p/trans_rdma.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.20"}, {"lessThan": "4.20", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.261", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.212", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.178", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.145", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.97", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "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\nnet/9p: fix race condition on rdma->state in trans_rdma.c\n\nThe rdma->state field is modified without holding req_lock in both\nrecv_done() and p9_cm_event_handler(), while rdma_request() accesses\nthe same field under the req_lock spinlock. This inconsistent locking\ncreates a race condition:\n\n- recv_done() running in softirq completion context sets\n rdma->state = P9_RDMA_FLUSHING without acquiring req_lock\n\n- p9_cm_event_handler() modifies rdma->state at multiple points\n (ADDR_RESOLVED, ROUTE_RESOLVED, ESTABLISHED, CLOSED) without\n req_lock\n\n- rdma_request() uses spin_lock_irqsave(&rdma->req_lock, flags) to\n protect the read-modify-write of rdma->state\n\nThe race can cause lost state transitions: recv_done() or the CM\nevent handler could set state to FLUSHING/CLOSED while rdma_request()\nis concurrently checking or modifying state under the lock, leading to\nthe FLUSHING transition being silently overwritten by CLOSING. This\ncorrupts the connection state machine and can cause use-after-free on\nRDMA request objects during teardown.\n\nFix by adding req_lock protection to all rdma->state modifications in\nrecv_done() and p9_cm_event_handler(), matching the pattern already\nused in rdma_request(). Use spin_lock_irqsave/spin_unlock_irqrestore\nin the CM event handler since it can race with recv_done() which runs\nin softirq context.\n\nTested with a kernel module that races two threads (simulating\nrdma_request and recv_done/CM handler) on rdma->state with proper\nlocking: 5.5M+ FLUSHING writes over 27M iterations with 0 lost\ntransitions."}], "id": "CVE-2026-72491", "lastModified": "2026-10-16T19:17:32.910", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-72491", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T18:50:50.731501Z", "version": "2.0.3"}}]}, "published": "2026-08-15T06:22:23.400", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/13bf9879b778b2f4b260b45bed18f31806120d1e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/151f8cf5b23d8a534d884432a82a6d54d5a61989"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3970a19a80de530b801b6256354d4a529a9a2d6c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4cee2b8766045059d5e0b8114837b4a8efe827ac"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5424138848eb7d7d8a7196676e90a2cbf2142454"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7d54894a1ee265a72d70f7cae1da6cc774cccc71"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8aadc136d8e8d8fc95d7982d213cfe2234dfcf2b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ebbcbe5c0db215feecc17def06178da443f4eea6"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: net/9p: fix race condition on rdma->state in trans_rdma.c", "id": "2516659", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516659"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-413", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet/9p: fix race condition on rdma->state in trans_rdma.c\nThe rdma->state field is modified without holding req_lock in both\nrecv_done() and p9_cm_event_handler(), while rdma_request() accesses\nthe same field under the req_lock spinlock. This inconsistent locking\ncreates a race condition:\n- recv_done() running in softirq completion context sets\nrdma->state = P9_RDMA_FLUSHING without acquiring req_lock\n- p9_cm_event_handler() modifies rdma->state at multiple points\n(ADDR_RESOLVED, ROUTE_RESOLVED, ESTABLISHED, CLOSED) without\nreq_lock\n- rdma_request() uses spin_lock_irqsave(&rdma->req_lock, flags) to\nprotect the read-modify-write of rdma->state\nThe race can cause lost state transitions: recv_done() or the CM\nevent handler could set state to FLUSHING/CLOSED while rdma_request()\nis concurrently checking or modifying state under the lock, leading to\nthe FLUSHING transition being silently overwritten by CLOSING. This\ncorrupts the connection state machine and can cause use-after-free on\nRDMA request objects during teardown.\nFix by adding req_lock protection to all rdma->state modifications in\nrecv_done() and p9_cm_event_handler(), matching the pattern already\nused in rdma_request(). Use spin_lock_irqsave/spin_unlock_irqrestore\nin the CM event handler since it can race with recv_done() which runs\nin softirq context.\nTested with a kernel module that races two threads (simulating\nrdma_request and recv_done/CM handler) on rdma->state with proper\nlocking: 5.5M+ FLUSHING writes over 27M iterations with 0 lost\ntransitions.", "A flaw was found in the Linux kernel's `net/9p` RDMA transport module. An inconsistent locking mechanism around the `rdma->state` field allows for a race condition during connection teardown. This can lead to lost state transitions, corrupting the connection state machine. Consequently, a use-after-free vulnerability may occur on RDMA request objects, potentially resulting in a denial of service or arbitrary code execution."], "name": "CVE-2026-72491", "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72491\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72491\nhttps://lore.kernel.org/linux-cve-announce/2026081539-CVE-2026-72491-dcae@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[473c7dd1d7b59ff8f88a5154737e3eac78a96e5b,4cee2b8766045059d5e0b8114837b4a8efe827ac)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[473c7dd1d7b59ff8f88a5154737e3eac78a96e5b,5424138848eb7d7d8a7196676e90a2cbf2142454)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[473c7dd1d7b59ff8f88a5154737e3eac78a96e5b,3970a19a80de530b801b6256354d4a529a9a2d6c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[473c7dd1d7b59ff8f88a5154737e3eac78a96e5b,8aadc136d8e8d8fc95d7982d213cfe2234dfcf2b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[473c7dd1d7b59ff8f88a5154737e3eac78a96e5b,151f8cf5b23d8a534d884432a82a6d54d5a61989)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[473c7dd1d7b59ff8f88a5154737e3eac78a96e5b,13bf9879b778b2f4b260b45bed18f31806120d1e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[473c7dd1d7b59ff8f88a5154737e3eac78a96e5b,ebbcbe5c0db215feecc17def06178da443f4eea6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[473c7dd1d7b59ff8f88a5154737e3eac78a96e5b,7d54894a1ee265a72d70f7cae1da6cc774cccc71)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "3479b3c35e82ed10aa0ca2ee9e78c4eded06ba62"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "c01ddaa54d7411e964ffd250c018d8469c5852f2"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "9e69c673fe077b8dc491cd8406c9bdcb1f76dee2"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "e48e7e27e4dfd00c81e0381e7cee610cce021452"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.4.185,4.5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.9.185,4.10)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.14.132,4.15)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.19.57,4.20)"}}], "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": "4.20"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,4.20)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.10.261,5.10.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.15.212,5.15.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.1.178,6.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.145,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.97,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.40,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1.5,7.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc1,*]"}}], "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": "2026-08-15T19:15:03.345659+00:00", "updated": "2026-08-22T05:00:13.398840+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}