{"id":"CVE-2026-63926","revision":null,"records":[{"revision":"ad0a8cf2a94545c490828d22f312888f","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-63926","aliases":[],"title":"bpf: sockmap: fix tail fragment offset in bpf_msg_push_data","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: sockmap: fix tail fragment offset in bpf_msg_push_data\n\nWhen bpf_msg_push_data() inserts data in the middle of a scatterlist\nentry, it splits the original entry into a left fragment and a right\nfragment.\n\nThe right fragment offset is page-local, but the code advances it with\n`start`, which is the message-global insertion point. For inserts into a\nnon-first SG entry, this over-advances the offset and leaves the split\nlayout inconsistent.\n\nAdvance the right fragment offset by the fragment-local delta,\n`start - offset`, which matches the length removed from the front of the\noriginal entry.","state":0,"publishedAt":"2026-07-19T14:55:27.154+00:00","modifiedAt":"2026-10-19T20:17:57.234+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/filter.c\"\n ],\n \"versions\": [\n {\n \"version\": \"6fff607e2f14bd7c63c06c464a6f93b8efbabe28\",\n \"lessThan\": \"f14609d8146707452e0822f3c8154674ce677251\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"6fff607e2f14bd7c63c06c464a6f93b8efbabe28\",\n \"lessThan\": \"d81b323af2dcee47573907ccb89c0df9b45cb2e2\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"6fff607e2f14bd7c63c06c464a6f93b8efbabe28\",\n \"lessThan\": \"aeb95146848d12206e1b2cfacd4f40e21ce81d94\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"6fff607e2f14bd7c63c06c464a6f93b8efbabe28\",\n \"lessThan\": \"96b72672ce849a1402730238e64d9b20bf06a96d\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"6fff607e2f14bd7c63c06c464a6f93b8efbabe28\",\n \"lessThan\": \"3075c21d2d76c0067f4a382765b43d6cc10470f1\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"6fff607e2f14bd7c63c06c464a6f93b8efbabe28\",\n \"lessThan\": \"5e19028667963fb371ebb00cecc2a473ef92056b\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"6fff607e2f14bd7c63c06c464a6f93b8efbabe28\",\n \"lessThan\": \"63f64a510c7917658ddf4d073ece73914ee25346\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"6fff607e2f14bd7c63c06c464a6f93b8efbabe28\",\n \"lessThan\": \"f72eed9b84fb771019a955908132410a9ba9ea3f\",\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/core/filter.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\": \"5.10.259\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.210\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.176\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.143\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.93\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.35\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.0.12\",\n \"lessThanOrEqual\": \"7.0.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.1\",\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/f14609d8146707452e0822f3c8154674ce677251","https://git.kernel.org/stable/c/d81b323af2dcee47573907ccb89c0df9b45cb2e2","https://git.kernel.org/stable/c/aeb95146848d12206e1b2cfacd4f40e21ce81d94","https://git.kernel.org/stable/c/96b72672ce849a1402730238e64d9b20bf06a96d","https://git.kernel.org/stable/c/3075c21d2d76c0067f4a382765b43d6cc10470f1","https://git.kernel.org/stable/c/5e19028667963fb371ebb00cecc2a473ef92056b","https://git.kernel.org/stable/c/63f64a510c7917658ddf4d073ece73914ee25346","https://git.kernel.org/stable/c/f72eed9b84fb771019a955908132410a9ba9ea3f"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-63926","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-63926","identifiers":["CVE-2026-63926"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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