{"id":"CVE-2022-50259","revision":null,"records":[{"revision":"4aa70e5e6b1b4c88ad04492b700f84cf","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2022-50259","aliases":[],"title":"bpf, sockmap: fix race in sock_map_free()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, sockmap: fix race in sock_map_free()\n\nsock_map_free() calls release_sock(sk) without owning a reference\non the socket. This can cause use-after-free as syzbot found [1]\n\nJakub Sitnicki already took care of a similar issue\nin sock_hash_free() in commit 75e68e5bf2c7 (\"bpf, sockhash:\nSynchronize delete from bucket list on map free\")\n\n[1]\nrefcount_t: decrement hit 0; leaking memory.\nWARNING: CPU: 0 PID: 3785 at lib/refcount.c:31 refcount_warn_saturate+0x17c/0x1a0 lib/refcount.c:31\nModules linked in:\nCPU: 0 PID: 3785 Comm: kworker/u4:6 Not tainted 6.1.0-rc7-syzkaller-00103-gef4d3ea40565 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022\nWorkqueue: events_unbound bpf_map_free_deferred\nRIP: 0010:refcount_warn_saturate+0x17c/0x1a0 lib/refcount.c:31\nCode: 68 8b 31 c0 e8 75 71 15 fd 0f 0b e9 64 ff ff ff e8 d9 6e 4e fd c6 05 62 9c 3d 0a 01 48 c7 c7 80 bb 68 8b 31 c0 e8 54 71 15 fd <0f> 0b e9 43 ff ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c a2 fe ff\nRSP: 0018:ffffc9000456fb60 EFLAGS: 00010246\nRAX: eae59bab72dcd700 RBX: 0000000000000004 RCX: ffff8880207057c0\nRDX: 0000000000000000 RSI: 0000000000000201 RDI: 0000000000000000\nRBP: 0000000000000004 R08: ffffffff816fdabd R09: fffff520008adee5\nR10: fffff520008adee5 R11: 1ffff920008adee4 R12: 0000000000000004\nR13: dffffc0000000000 R14: ffff88807b1c6c00 R15: 1ffff1100f638dcf\nFS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000001b30c30000 CR3: 000000000d08e000 CR4: 00000000003506f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n\n__refcount_dec include/linux/refcount.h:344 [inline]\nrefcount_dec include/linux/refcount.h:359 [inline]\n__sock_put include/net/sock.h:779 [inline]\ntcp_release_cb+0x2d0/0x360 net/ipv4/tcp_output.c:1092\nrelease_sock+0xaf/0x1c0 net/core/sock.c:3468\nsock_map_free+0x219/0x2c0 net/core/sock_map.c:356\nprocess_one_work+0x81c/0xd10 kernel/workqueue.c:2289\nworker_thread+0xb14/0x1330 kernel/workqueue.c:2436\nkthread+0x266/0x300 kernel/kthread.c:376\nret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306\n","state":0,"publishedAt":"2025-09-15T14:02:47.875+00:00","modifiedAt":"2026-10-15T21:31:19.702+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/core/sock_map.c\"\n ],\n \"versions\": [\n {\n \"version\": \"20ae0cb8983b05136d5293c47fadc99a8ca8ca2d\",\n \"lessThan\": \"4cabc3af4a6f36c222fecb15858c1060e59218e7\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"7e81a35302066c5a00b4c72d83e3ea4cad6eeb5b\",\n \"lessThan\": \"be719496ae6a7fc325e9e5056a52f63ebc84cc0c\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"7e81a35302066c5a00b4c72d83e3ea4cad6eeb5b\",\n \"lessThan\": \"a443c55d96dede82a724df6e70a318ad15c199e1\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"7e81a35302066c5a00b4c72d83e3ea4cad6eeb5b\",\n \"lessThan\": \"e8b2b392a646bf5cb9413c1cc7a39d99c1b65a62\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"7e81a35302066c5a00b4c72d83e3ea4cad6eeb5b\",\n \"lessThan\": \"5c3568166129bc73fd6b37748d2d8f95cd8f22f3\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"7e81a35302066c5a00b4c72d83e3ea4cad6eeb5b\",\n \"lessThan\": \"0a182f8d607464911756b4dbef5d6cad8de22469\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"5.4.14\",\n \"lessThan\": \"5.4.229\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\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/core/sock_map.c\"\n ],\n \"versions\": [\n {\n \"version\": \"5.5\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"5.5\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.4.229\",\n \"lessThanOrEqual\": \"5.4.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.163\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.86\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.0.16\",\n \"lessThanOrEqual\": \"6.0.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.2\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.2\",\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/4cabc3af4a6f36c222fecb15858c1060e59218e7","https://git.kernel.org/stable/c/be719496ae6a7fc325e9e5056a52f63ebc84cc0c","https://git.kernel.org/stable/c/a443c55d96dede82a724df6e70a318ad15c199e1","https://git.kernel.org/stable/c/e8b2b392a646bf5cb9413c1cc7a39d99c1b65a62","https://git.kernel.org/stable/c/5c3568166129bc73fd6b37748d2d8f95cd8f22f3","https://git.kernel.org/stable/c/0a182f8d607464911756b4dbef5d6cad8de22469"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2022-50259","license":"CVE Program Terms of Use","key":"cve-program:CVE-2022-50259","identifiers":["CVE-2022-50259"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-09T14:04:00.1516715+00:00","complete":true,"records":1769,"lastAttemptAt":"2026-11-09T14:04:00.1516715+00:00","lastSuccessAt":"2026-11-09T14:04:00.2969466+00:00","error":null,"lastVerifiedAt":"2026-11-09T14:04:00.2969495+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-24e6fde7b744113daefb8f6135035fb8a5c69c9617c9c0d40574a0376532ffd3-63bead6b33209140263fb436f2f7924cdf0a57ddb97fc634114a22ac37965cfc","complete":true,"records":421444,"lastAttemptAt":"2026-11-09T14:02:14.5012261+00:00","lastSuccessAt":"2026-11-09T14:02:14.4549407+00:00","error":null,"lastVerifiedAt":"2026-11-09T14:02:14.5012261+00:00","snapshotPublishedAt":"2026-11-09T13:24:52+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. 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No reader inventory is sent.","generation":"enrichment-fec5a400f2004099a6ceb2e015ba7713","complete":true,"records":13667,"lastAttemptAt":"2026-11-09T14:04:00.8740665+00:00","lastSuccessAt":"2026-11-09T13:04:37.338+00:00","error":null,"lastVerifiedAt":"2026-11-09T13:04:37.338+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13707,"expectedIdentifiers":13707,"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":"2026-11-09T14:04:00.1058982+00:00","lastSuccessAt":"2026-11-08T11:07:07.068788+00:00","error":null,"lastVerifiedAt":"2026-11-09T14:04:00.1058982+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":"2026-11-09T14:02:14.6544671+00:00","lastSuccessAt":"2026-11-06T19:03:17.0399903+00:00","error":null,"lastVerifiedAt":"2026-11-09T14:02:14.6544671+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-c905fa1bd26c7b261e77cc7202a86dc766ff31c2b096b501f3bf44f561e34970","complete":true,"records":3063,"lastAttemptAt":"2026-11-09T14:04:00.1196922+00:00","lastSuccessAt":"2026-11-09T12:02:21.7931207+00:00","error":null,"lastVerifiedAt":"2026-11-09T14:04:00.1196922+00:00","snapshotPublishedAt":"2026-11-09T11:18:00+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-0a2950eb931e2cbd521c1ee48327cd287727b9b342d55a1210c0101010ad92b5","complete":true,"records":231299,"lastAttemptAt":"2026-11-09T14:03:59.9741082+00:00","lastSuccessAt":"2026-11-09T14:03:58.6011989+00:00","error":null,"lastVerifiedAt":"2026-11-09T14:03:59.9741082+00:00","snapshotPublishedAt":"2026-11-09T13:48:25+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}