{"id":"CVE-2026-74589","revision":null,"records":[{"revision":"cce4cb827894420386bd8b5ab0151b02","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-74589","aliases":[],"title":"bpf, sockmap: Fix sk_redir use-after-free in send verdict","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, sockmap: Fix sk_redir use-after-free in send verdict\n\nsk_psock_msg_verdict() takes a socket reference for psock->sk_redir.\ntcp_bpf_send_verdict() copies that pointer while holding the source socket\nlock, but does not take a reference for the local copy before dropping the\nlock around tcp_bpf_sendmsg_redir().\n\nWhen apply_bytes keeps the cached verdict active, another sendmsg() on the\nsame source socket can consume the remaining bytes and release the cached\nreference while the first thread still holds only the raw local pointer:\n\n CPU 0 CPU 1\n sk_redir = psock->sk_redir\n apply_bytes remains nonzero\n release_sock(sk)\n lock_sock(sk)\n apply_bytes reaches zero\n psock->sk_redir = NULL\n release_sock(sk)\n tcp_bpf_sendmsg_redir(sk_redir)\n sock_put(sk_redir)\n tcp_bpf_sendmsg_redir(sk_redir)\n\nThe final sock_put() can free sk_redir before CPU 0 dereferences it.\n\nKASAN reported:\n\n BUG: KASAN: slab-use-after-free in tcp_bpf_sendmsg_redir+0xf39/0x1020\n Read of size 8 at addr ffff888108537090 by task poc/87\n Call Trace:\n tcp_bpf_sendmsg_redir+0xf39/0x1020\n tcp_bpf_sendmsg+0x977/0x1a50\n __sys_sendto+0x32c/0x3a0\n __x64_sys_sendto+0xdb/0x1b0\n Allocated by task 85:\n sk_prot_alloc+0x56/0x210\n sk_clone+0x6f/0x14b0\n inet_csk_clone_lock+0x24/0x740\n tcp_create_openreq_child+0x25/0x2710\n tcp_v4_syn_recv_sock+0x10a/0xe00\n Freed by task 0:\n __kasan_slab_free+0x43/0x70\n slab_free_after_rcu_debug+0xa6/0x1e0\n rcu_core+0x50a/0x1850\n Last potentially related work creation:\n __sk_destruct+0x3da/0x540\n sk_psock_destroy+0x81e/0xab0\n process_one_work+0x63a/0x1070\n\nTake a temporary socket reference while the source socket lock still\nprotects psock->sk_redir, and drop it after tcp_bpf_sendmsg_redir()\nreturns. This keeps each unlocked use independent of cached-verdict\nownership.","state":0,"publishedAt":"2026-08-22T15:31:41.177+00:00","modifiedAt":"2026-10-16T19:05:59.193+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/ipv4/tcp_bpf.c\"\n ],\n \"versions\": [\n {\n \"version\": \"604326b41a6fb9b4a78b6179335decee0365cd8c\",\n \"lessThan\": \"41b7da0cb72ca5aa1e62b68dab323d0791fc6bdf\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"604326b41a6fb9b4a78b6179335decee0365cd8c\",\n \"lessThan\": \"9b4fbc371a6ecf1b4e43b5a629015cc0830d8de3\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"604326b41a6fb9b4a78b6179335decee0365cd8c\",\n \"lessThan\": \"90a19b0894ba79a699b48cf44421b36fbd566e99\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"604326b41a6fb9b4a78b6179335decee0365cd8c\",\n \"lessThan\": \"d192cff2a37d59206dabe6ec2e60ceac6271f274\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"604326b41a6fb9b4a78b6179335decee0365cd8c\",\n \"lessThan\": \"4c9d9aa809c261dc0490a0e19d675f7e8e4c85bf\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"604326b41a6fb9b4a78b6179335decee0365cd8c\",\n \"lessThan\": \"a14e4ef1d90c3418f01b3b6b8fd3a40a0a208a10\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"604326b41a6fb9b4a78b6179335decee0365cd8c\",\n \"lessThan\": \"1cec526cf0a2227395f2c2f4b671cb052ff0b00e\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"604326b41a6fb9b4a78b6179335decee0365cd8c\",\n \"lessThan\": \"a76624733730e541e4955fdecf506af2f6b20558\",\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/ipv4/tcp_bpf.c\"\n ],\n \"versions\": [\n {\n \"version\": \"4.20\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"4.20\",\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:N/UI:N/S:U/C:H/I:H/A:H","score":8.4,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/41b7da0cb72ca5aa1e62b68dab323d0791fc6bdf","https://git.kernel.org/stable/c/9b4fbc371a6ecf1b4e43b5a629015cc0830d8de3","https://git.kernel.org/stable/c/90a19b0894ba79a699b48cf44421b36fbd566e99","https://git.kernel.org/stable/c/d192cff2a37d59206dabe6ec2e60ceac6271f274","https://git.kernel.org/stable/c/4c9d9aa809c261dc0490a0e19d675f7e8e4c85bf","https://git.kernel.org/stable/c/a14e4ef1d90c3418f01b3b6b8fd3a40a0a208a10","https://git.kernel.org/stable/c/1cec526cf0a2227395f2c2f4b671cb052ff0b00e","https://git.kernel.org/stable/c/a76624733730e541e4955fdecf506af2f6b20558"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74589","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-74589","identifiers":["CVE-2026-74589"]},"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}]}