{"id":"CVE-2026-74660","revision":null,"records":[{"revision":"f07ad923e3f34e6795594fa2d43d5111","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-74660","aliases":[],"title":"netfilter: ebt_nflog: pin the NFLOG backend","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ebt_nflog: pin the NFLOG backend\n\nnf_log_unregister() runs after the per-net teardown so its final RCU\ngrace period also drains readers that obtained the logger from a per-net\nbinding. However, ebt_nflog passes an explicit ULOG log type to\nnf_log_packet() without holding a reference on the selected logger module,\nunlike the xt_NFLOG and nft_log frontends.\n\nAn ebtables nflog rule can therefore remain callable while nfnetlink_log\nis unloaded. The resulting interleaving is:\n\n CPU 0 CPU 1\n nfnetlink_log_fini()\n unregister_pernet_subsys()\n kfree(nfnl_log_pernet(net))\n ebt_nflog_tg()\n nf_log_packet()\n nfulnl_log_packet()\n instance_lookup_get_rcu()\n\nThe global ULOG logger is still registered at this point, so CPU 1\ndereferences the per-net state after CPU 0 has freed it. KASAN reported:\n\n BUG: KASAN: slab-use-after-free in instance_lookup_get_rcu\n Read of size 8 at addr ff110001052e6210 by task poc/92\n Call Trace:\n instance_lookup_get_rcu+0x1ce/0x1f0 [nfnetlink_log]\n nfulnl_log_packet+0x248/0x2fb0 [nfnetlink_log]\n nf_log_packet+0x204/0x300\n ebt_nflog_tg+0x351/0x550\n ebt_do_table+0xedf/0x22b0\n Allocated by task 90:\n __kmalloc_noprof+0x186/0x470\n ops_init+0x6d/0x420\n register_pernet_operations+0x2f6/0x670\n register_pernet_subsys+0x23/0x40\n Freed by task 93:\n kfree+0x131/0x3c0\n ops_undo_list+0x3e3/0x700\n unregister_pernet_operations+0x232/0x490\n unregister_pernet_subsys+0x1c/0x30\n nfnetlink_log_fini+0x34/0x450 [nfnetlink_log]\n\nAcquire the ULOG logger module reference when an ebt_nflog rule is\nvalidated and release it when the rule is destroyed. Request the NFLOG\nbackend for legacy callers when needed, matching xt_NFLOG. This prevents\nmodule teardown until all ebt_nflog rules have stopped using the logger.","state":0,"publishedAt":"2026-08-22T15:32:33.677+00:00","modifiedAt":"2026-10-16T19:16:07.659+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/bridge/netfilter/ebt_nflog.c\"\n ],\n \"versions\": [\n {\n \"version\": \"c83fa19603bdaeef17b815713dbbe3230c8a34ee\",\n \"lessThan\": \"3bcce49d617c593c7606083bfdb464a1761fa68d\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"c83fa19603bdaeef17b815713dbbe3230c8a34ee\",\n \"lessThan\": \"394d7939c6b2b9e6bea0844c89efb5913168d898\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"c83fa19603bdaeef17b815713dbbe3230c8a34ee\",\n \"lessThan\": \"2cac4294f184c9bc19ff82552c62b80498694c39\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"c83fa19603bdaeef17b815713dbbe3230c8a34ee\",\n \"lessThan\": \"9d8a94b48b393885e7f876c8ef68ed4da5012078\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"c83fa19603bdaeef17b815713dbbe3230c8a34ee\",\n \"lessThan\": \"6809379a860b9fccbb5435bf08343f6d081ac68d\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"c83fa19603bdaeef17b815713dbbe3230c8a34ee\",\n \"lessThan\": \"47a119ec8a7e2d5c8c4e86fb1a56c4e696e500fb\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"c83fa19603bdaeef17b815713dbbe3230c8a34ee\",\n \"lessThan\": \"e2ab7e878bdbe80104c879c31fd2d82a476703b8\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"c83fa19603bdaeef17b815713dbbe3230c8a34ee\",\n \"lessThan\": \"30825970339c107bacaf7f61af90fcdb1f597ca1\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/bridge/netfilter/ebt_nflog.c\"\n ],\n \"versions\": [\n {\n \"version\": \"4.12\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"4.12\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.265\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.216\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.183\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.152\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.104\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.45\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.1.9\",\n \"lessThanOrEqual\": \"7.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.2\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/3bcce49d617c593c7606083bfdb464a1761fa68d","https://git.kernel.org/stable/c/394d7939c6b2b9e6bea0844c89efb5913168d898","https://git.kernel.org/stable/c/2cac4294f184c9bc19ff82552c62b80498694c39","https://git.kernel.org/stable/c/9d8a94b48b393885e7f876c8ef68ed4da5012078","https://git.kernel.org/stable/c/6809379a860b9fccbb5435bf08343f6d081ac68d","https://git.kernel.org/stable/c/47a119ec8a7e2d5c8c4e86fb1a56c4e696e500fb","https://git.kernel.org/stable/c/e2ab7e878bdbe80104c879c31fd2d82a476703b8","https://git.kernel.org/stable/c/30825970339c107bacaf7f61af90fcdb1f597ca1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74660","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-74660","identifiers":["CVE-2026-74660"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-09T08:02:26.2193293+00:00","complete":true,"records":1769,"lastAttemptAt":"2026-11-09T08:02:26.2193293+00:00","lastSuccessAt":"2026-11-09T08:02:26.3903284+00:00","error":null,"lastVerifiedAt":"2026-11-09T08:02:26.3903314+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-24e6fde7b744113daefb8f6135035fb8a5c69c9617c9c0d40574a0376532ffd3-bac7baae6881807b2b4a9dce5cf5dd63af98be3e5c79f031b11fd288ebb8cee0","complete":true,"records":421301,"lastAttemptAt":"2026-11-09T08:02:25.6827821+00:00","lastSuccessAt":"2026-11-09T07:02:22.9878009+00:00","error":"HttpRequestException","lastVerifiedAt":"2026-11-09T07:02:23.0094052+00:00","snapshotPublishedAt":"2026-11-09T06:27:21+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-0bc6adcd3c0c448aa2e9bc2063d5a999","complete":false,"records":13654,"lastAttemptAt":"2026-11-09T08:14:22.8145543+00:00","lastSuccessAt":"2026-11-09T08:14:22.81+00:00","error":"14 identifier lookups failed; latest failures include HTTP 403. Other identifiers were checked independently.","lastVerifiedAt":"2026-11-09T08:14:22.81+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13684,"expectedIdentifiers":13706,"failedIdentifiers":14},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-09T08:02:26.2193293+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-09T08:02:26.2193293+00:00","lastSuccessAt":"2026-11-09T08:02:26.3910394+00:00","error":null,"lastVerifiedAt":"2026-11-09T08:02:26.3910397+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-156d67f0b09643159ff4bd684ee896db","complete":true,"records":13666,"lastAttemptAt":"2026-11-09T08:02:26.9587387+00:00","lastSuccessAt":"2026-11-09T07:04:26.209+00:00","error":null,"lastVerifiedAt":"2026-11-09T07:04:26.209+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13706,"expectedIdentifiers":13706,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-980593e6977a6d1b4fb1eed5a1ffe88a468736f89f0a06f710924ad59132c023","complete":true,"records":9914,"lastAttemptAt":"2026-11-09T08:02:26.1458433+00:00","lastSuccessAt":"2026-11-08T11:07:07.068788+00:00","error":null,"lastVerifiedAt":"2026-11-09T08:02:26.1458433+00:00","snapshotPublishedAt":"2026-11-08T11:02:46+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-fde804134ecdda0ddd5ff5c26ee1fff5a6fa659311f7ef2e51c6ad54964db0e2","complete":true,"records":1971,"lastAttemptAt":"2026-11-09T08:02:25.8338551+00:00","lastSuccessAt":"2026-11-06T19:03:17.0399903+00:00","error":null,"lastVerifiedAt":"2026-11-09T08:02:25.8338551+00:00","snapshotPublishedAt":"2026-11-06T18:17:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-f6d341f4320a5a0c059c28102ee651c3dd06abc87b84d2bafa4e2a823ec07d35","complete":true,"records":3056,"lastAttemptAt":"2026-11-09T08:02:26.1741996+00:00","lastSuccessAt":"2026-11-09T05:02:23.1539412+00:00","error":null,"lastVerifiedAt":"2026-11-09T08:02:26.1741996+00:00","snapshotPublishedAt":"2026-11-09T04:47:48+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-32fcf2a839d0d91a36b31c98096d6b8a1a8cc523d64745f8a939e306130e49f2","complete":true,"records":231296,"lastAttemptAt":"2026-11-09T08:02:25.9613255+00:00","lastSuccessAt":"2026-11-09T07:04:23.2641171+00:00","error":null,"lastVerifiedAt":"2026-11-09T08:02:25.9613255+00:00","snapshotPublishedAt":"2026-11-09T06:48:11+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}