{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74692", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.926Z", "datePublished": "2026-08-22T15:32:55.873Z", "dateUpdated": "2026-08-22T15:32:55.873Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-22T15:32:55.873Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: fix TOCTOU race between smc_listen_out() and listener close\n\nsmc_listen_out() reads lsmc->sk.sk_state without the listener lock,\nthen acquires lock_sock_nested() only after the check passes. This\nopens a window where smc_close_active() can transition the listener\nto SMC_CLOSED, call smc_close_cleanup_listen() to drain the accept\nqueue, and release the lock, all between the lockless read and the\ndelayed lock acquisition:\n\n smc_listen_work (smc_hs_wq) smc_close_active()\n ------------------------------- -------------------------\n release_sock(child)\n if (sk_state == SMC_LISTEN) TRUE\n lock_sock(listener)\n sk_state = SMC_CLOSED\n smc_close_cleanup_listen()\n release_sock(listener)\n flush_work(tcp_listen_work)\n lock_sock_nested(listener)\n smc_accept_enqueue(listener, child) /* child enqueued on dead listener */\n\nsmc_close_active() flushes only tcp_listen_work. Work items already\ndispatched onto smc_hs_wq for the CLC handshake continue running\nunguarded. smc_accept_enqueue() takes a sock_hold() on the child that\nis never released, so the child smc_sock, its clcsock, and the\nreference all leak. A remote peer that opens TCP connections while the\nserver calls close() can exhaust kernel memory.\n\nMove lock_sock_nested() to before the sk_state check so that the test\nand the enqueue are atomic under the listener lock."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/smc/af_smc.c"], "versions": [{"version": "fd57770dd198f5b2ddd5b9e6bf282cf98d63adb9", "lessThan": "53c7938d8bcfde3296ec1a347ba2a9393c1fdcfa", "status": "affected", "versionType": "git"}, {"version": "fd57770dd198f5b2ddd5b9e6bf282cf98d63adb9", "lessThan": "feb71634bb1abab3e8fb5cde874b27001cc1282e", "status": "affected", "versionType": "git"}, {"version": "fd57770dd198f5b2ddd5b9e6bf282cf98d63adb9", "lessThan": "01865e1ddb126b25ac9eba5cdd7ec49e11183a64", "status": "affected", "versionType": "git"}, {"version": "fd57770dd198f5b2ddd5b9e6bf282cf98d63adb9", "lessThan": "00f89433777236ced4771211047fb5d4cd581cea", "status": "affected", "versionType": "git"}, {"version": "fd57770dd198f5b2ddd5b9e6bf282cf98d63adb9", "lessThan": "78e5ebcd1c10ed7c8bda0a99e0abd5b62da86d67", "status": "affected", "versionType": "git"}, {"version": "fd57770dd198f5b2ddd5b9e6bf282cf98d63adb9", "lessThan": "ff5bcd804b5bc5c64736b7d318c20e12ea9506b8", "status": "affected", "versionType": "git"}, {"version": "fd57770dd198f5b2ddd5b9e6bf282cf98d63adb9", "lessThan": "185a4caeecabc150106deda1da170b09f2ad803f", "status": "affected", "versionType": "git"}, {"version": "d1d004585b40c212b338fc8a40cbaaf230ea4703", "status": "affected", "versionType": "git"}, {"version": "4.19.299", "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/smc/af_smc.c"], "versions": [{"version": "5.1", "status": "affected"}, {"version": "0", "lessThan": "5.1", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.216", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.183", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.152", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.104", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.45", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.9", "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": "5.1", "versionEndExcluding": "5.15.216"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "6.1.183"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "6.6.152"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "6.12.104"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "6.18.45"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "7.1.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "7.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19.299"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/53c7938d8bcfde3296ec1a347ba2a9393c1fdcfa"}, {"url": "https://git.kernel.org/stable/c/feb71634bb1abab3e8fb5cde874b27001cc1282e"}, {"url": "https://git.kernel.org/stable/c/01865e1ddb126b25ac9eba5cdd7ec49e11183a64"}, {"url": "https://git.kernel.org/stable/c/00f89433777236ced4771211047fb5d4cd581cea"}, {"url": "https://git.kernel.org/stable/c/78e5ebcd1c10ed7c8bda0a99e0abd5b62da86d67"}, {"url": "https://git.kernel.org/stable/c/ff5bcd804b5bc5c64736b7d318c20e12ea9506b8"}, {"url": "https://git.kernel.org/stable/c/185a4caeecabc150106deda1da170b09f2ad803f"}], "title": "net/smc: fix TOCTOU race between smc_listen_out() and listener close", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/smc/af_smc.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "53c7938d8bcfde3296ec1a347ba2a9393c1fdcfa", "status": "affected", "version": "fd57770dd198f5b2ddd5b9e6bf282cf98d63adb9", "versionType": "git"}, {"lessThan": "feb71634bb1abab3e8fb5cde874b27001cc1282e", "status": "affected", "version": "fd57770dd198f5b2ddd5b9e6bf282cf98d63adb9", "versionType": "git"}, {"lessThan": "01865e1ddb126b25ac9eba5cdd7ec49e11183a64", "status": "affected", "version": "fd57770dd198f5b2ddd5b9e6bf282cf98d63adb9", "versionType": "git"}, {"lessThan": "00f89433777236ced4771211047fb5d4cd581cea", "status": "affected", "version": "fd57770dd198f5b2ddd5b9e6bf282cf98d63adb9", "versionType": "git"}, {"lessThan": "78e5ebcd1c10ed7c8bda0a99e0abd5b62da86d67", "status": "affected", "version": "fd57770dd198f5b2ddd5b9e6bf282cf98d63adb9", "versionType": "git"}, {"lessThan": "ff5bcd804b5bc5c64736b7d318c20e12ea9506b8", "status": "affected", "version": "fd57770dd198f5b2ddd5b9e6bf282cf98d63adb9", "versionType": "git"}, {"lessThan": "185a4caeecabc150106deda1da170b09f2ad803f", "status": "affected", "version": "fd57770dd198f5b2ddd5b9e6bf282cf98d63adb9", "versionType": "git"}, {"status": "affected", "version": "d1d004585b40c212b338fc8a40cbaaf230ea4703", "versionType": "git"}, {"lessThan": "4.20", "status": "affected", "version": "4.19.299", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/smc/af_smc.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.1"}, {"lessThan": "5.1", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.216", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.183", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.152", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.104", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.45", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.9", "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/smc: fix TOCTOU race between smc_listen_out() and listener close\n\nsmc_listen_out() reads lsmc->sk.sk_state without the listener lock,\nthen acquires lock_sock_nested() only after the check passes. This\nopens a window where smc_close_active() can transition the listener\nto SMC_CLOSED, call smc_close_cleanup_listen() to drain the accept\nqueue, and release the lock, all between the lockless read and the\ndelayed lock acquisition:\n\n smc_listen_work (smc_hs_wq) smc_close_active()\n ------------------------------- -------------------------\n release_sock(child)\n if (sk_state == SMC_LISTEN) TRUE\n lock_sock(listener)\n sk_state = SMC_CLOSED\n smc_close_cleanup_listen()\n release_sock(listener)\n flush_work(tcp_listen_work)\n lock_sock_nested(listener)\n smc_accept_enqueue(listener, child) /* child enqueued on dead listener */\n\nsmc_close_active() flushes only tcp_listen_work. Work items already\ndispatched onto smc_hs_wq for the CLC handshake continue running\nunguarded. smc_accept_enqueue() takes a sock_hold() on the child that\nis never released, so the child smc_sock, its clcsock, and the\nreference all leak. A remote peer that opens TCP connections while the\nserver calls close() can exhaust kernel memory.\n\nMove lock_sock_nested() to before the sk_state check so that the test\nand the enqueue are atomic under the listener lock."}], "id": "CVE-2026-74692", "lastModified": "2026-08-22T16:16:43.667", "metrics": {}, "published": "2026-08-22T16:16:43.667", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/00f89433777236ced4771211047fb5d4cd581cea"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/01865e1ddb126b25ac9eba5cdd7ec49e11183a64"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/185a4caeecabc150106deda1da170b09f2ad803f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/53c7938d8bcfde3296ec1a347ba2a9393c1fdcfa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/78e5ebcd1c10ed7c8bda0a99e0abd5b62da86d67"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/feb71634bb1abab3e8fb5cde874b27001cc1282e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ff5bcd804b5bc5c64736b7d318c20e12ea9506b8"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fd57770dd198f5b2ddd5b9e6bf282cf98d63adb9,53c7938d8bcfde3296ec1a347ba2a9393c1fdcfa]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fd57770dd198f5b2ddd5b9e6bf282cf98d63adb9,feb71634bb1abab3e8fb5cde874b27001cc1282e]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fd57770dd198f5b2ddd5b9e6bf282cf98d63adb9,01865e1ddb126b25ac9eba5cdd7ec49e11183a64]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fd57770dd198f5b2ddd5b9e6bf282cf98d63adb9,00f89433777236ced4771211047fb5d4cd581cea]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fd57770dd198f5b2ddd5b9e6bf282cf98d63adb9,78e5ebcd1c10ed7c8bda0a99e0abd5b62da86d67]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fd57770dd198f5b2ddd5b9e6bf282cf98d63adb9,ff5bcd804b5bc5c64736b7d318c20e12ea9506b8]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fd57770dd198f5b2ddd5b9e6bf282cf98d63adb9,185a4caeecabc150106deda1da170b09f2ad803f]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "d1d004585b40c212b338fc8a40cbaaf230ea4703"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.19.299,4.20)"}}], "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": "generic", "value": "5.1"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.1)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.216,5.15.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.183,6.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.152,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.104,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.45,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.9,7.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2,*]"}}], "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": "2026-08-22T17:30:02.931243+00:00", "updated": "2026-08-22T21:00:13.439949+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-362"]}