{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-98231", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.328Z", "datePublished": "2026-10-06T08:45:05.183Z", "dateUpdated": "2026-10-19T09:16:03.101Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:16:03.101Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: serialize state GC with device state flush\n\nThe deferred-device pass in xfrm_dev_state_flush() finds states under\nxfrm_state_dev_gc_lock, but drops the lock before calling\nxfrm_dev_state_free() because the driver callback may sleep. The device\nGC list does not hold an xfrm_state reference, so the state GC worker can\ndestroy the same state concurrently.\n\nThe race can proceed as follows:\n\n CPU 0 CPU 1\n find x on the device GC list\n drop xfrm_state_dev_gc_lock\n read x->xso.dev\n xfrm_state_gc_destroy(x)\n xfrm_dev_state_free(x)\n xfrm_state_free(x)\n continue xfrm_dev_state_free(x)\n\nBoth paths can invoke the driver callback and drop the device reference.\nCPU 0 can also access the xfrm_state after CPU 1 has freed it.\n\nKASAN reported:\n\n BUG: KASAN: slab-use-after-free in xfrm_dev_state_free+0x24c/0x2a0\n Read of size 8 at addr ffff88810bbaa960 by task poc/102\n\n Call Trace:\n xfrm_dev_state_free+0x24c/0x2a0\n xfrm_dev_state_flush+0x353/0x400\n xfrm_dev_event+0x26d/0x3a0\n notifier_call_chain+0xc0/0x280\n __dev_notify_flags+0x169/0x250\n netif_change_flags+0xe7/0x160\n dev_change_flags+0x96/0x220\n devinet_ioctl+0x7f4/0x1880\n\n Allocated by task 87:\n xfrm_state_alloc+0x1e/0x5c0\n xfrm_add_sa+0xe7f/0x5820\n xfrm_user_rcv_msg+0x4f3/0x940\n\n Freed by task 57:\n kmem_cache_free+0xcb/0x3d0\n xfrm_state_gc_task+0x4a8/0x650\n process_one_work+0x63a/0x1070\n\nSerialize xfrm_state destruction against the deferred-device pass with a\nmutex. Keep xfrm_state_dev_gc_lock limited to list operations and retain\nthe existing callback and device-reference release ordering." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/xfrm/xfrm_state.c" ], "versions": [ { "version": "d5f53edd43daf3e6e1633a49c561387f8f99e13f", "lessThan": "937108dc0258d6ac69926b00bc53598c98986ee1", "status": "affected", "versionType": "git" }, { "version": "07b87f9eea0c30675084d50c82532d20168da009", "lessThan": "39e41af3653ee45c985190dd97426f318918d201", "status": "affected", "versionType": "git" }, { "version": "07b87f9eea0c30675084d50c82532d20168da009", "lessThan": "75fc4561772e2f9811abf39ed10443e6f4a4bc6c", "status": "affected", "versionType": "git" }, { "version": "07b87f9eea0c30675084d50c82532d20168da009", "lessThan": "84e378395494963b1e581cf223a7cbeec8c0e2d6", "status": "affected", "versionType": "git" }, { "version": "07b87f9eea0c30675084d50c82532d20168da009", "lessThan": "89fefad9f971bc637fb22373078144f2563c4be9", "status": "affected", "versionType": "git" }, { "version": "8ecee44464a4926c9bef989a1490b7394785f584", "status": "affected", "versionType": "git" }, { "version": "6.6.44", "lessThan": "6.6.158", "status": "affected", "versionType": "semver" }, { "version": "6.10.3", "lessThan": "6.11", "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/xfrm/xfrm_state.c" ], "versions": [ { "version": "6.11", "status": "affected" }, { "version": "0", "lessThan": "6.11", "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": "6.18.54", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.8", "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": "6.6.44", "versionEndExcluding": "6.6.158" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "6.12.112" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "6.18.54" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "7.2.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "7.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/937108dc0258d6ac69926b00bc53598c98986ee1" }, { "url": "https://git.kernel.org/stable/c/39e41af3653ee45c985190dd97426f318918d201" }, { "url": "https://git.kernel.org/stable/c/75fc4561772e2f9811abf39ed10443e6f4a4bc6c" }, { "url": "https://git.kernel.org/stable/c/84e378395494963b1e581cf223a7cbeec8c0e2d6" }, { "url": "https://git.kernel.org/stable/c/89fefad9f971bc637fb22373078144f2563c4be9" } ], "title": "xfrm: serialize state GC with device state flush", "x_generator": { "engine": "bippy-1.2.0" } } } }