{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-72491", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-72491", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-08-15T05:57:26.281Z", "updatedAt": "2026-10-16T18:55:26.515Z", "importedAt": "2026-10-24T01:58:25.636Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "net/9p: fix race condition on rdma->state in trans_rdma.c", "summary": "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.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "status": "affected", "versionType": "git", "lessThan": "4cee2b8766045059d5e0b8114837b4a8efe827ac" }, { "version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "status": "affected", "versionType": "git", "lessThan": "5424138848eb7d7d8a7196676e90a2cbf2142454" }, { "version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "status": "affected", "versionType": "git", "lessThan": "3970a19a80de530b801b6256354d4a529a9a2d6c" }, { "version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "status": "affected", "versionType": "git", "lessThan": "8aadc136d8e8d8fc95d7982d213cfe2234dfcf2b" }, { "version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "status": "affected", "versionType": "git", "lessThan": "151f8cf5b23d8a534d884432a82a6d54d5a61989" }, { "version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "status": "affected", "versionType": "git", "lessThan": "13bf9879b778b2f4b260b45bed18f31806120d1e" }, { "version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "status": "affected", "versionType": "git", "lessThan": "ebbcbe5c0db215feecc17def06178da443f4eea6" }, { "version": "473c7dd1d7b59ff8f88a5154737e3eac78a96e5b", "status": "affected", "versionType": "git", "lessThan": "7d54894a1ee265a72d70f7cae1da6cc774cccc71" }, { "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", "status": "affected", "versionType": "semver", "lessThan": "4.5" }, { "version": "4.9.185", "status": "affected", "versionType": "semver", "lessThan": "4.10" }, { "version": "4.14.132", "status": "affected", "versionType": "semver", "lessThan": "4.15" }, { "version": "4.19.57", "status": "affected", "versionType": "semver", "lessThan": "4.20" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "4.20", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "4.20" }, { "version": "5.10.261", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.212", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.178", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.145", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.97", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.40", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.1.5", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.1.*" }, { "version": "7.2", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }