{"api_version":"1","generated_at":"2026-07-23T20:55:38+00:00","cve":"CVE-2026-63926","urls":{"html":"https://cve.report/CVE-2026-63926","api":"https://cve.report/api/cve/CVE-2026-63926.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-63926","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-63926"},"summary":{"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":"PUBLISHED","assigner":"Linux","published_at":"2026-07-19 16:17:10","updated_at":"2026-07-20 15:16:57"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"8.4","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":8.4,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"8.4","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":8.4,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/f72eed9b84fb771019a955908132410a9ba9ea3f","name":"https://git.kernel.org/stable/c/f72eed9b84fb771019a955908132410a9ba9ea3f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/63f64a510c7917658ddf4d073ece73914ee25346","name":"https://git.kernel.org/stable/c/63f64a510c7917658ddf4d073ece73914ee25346","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3075c21d2d76c0067f4a382765b43d6cc10470f1","name":"https://git.kernel.org/stable/c/3075c21d2d76c0067f4a382765b43d6cc10470f1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5e19028667963fb371ebb00cecc2a473ef92056b","name":"https://git.kernel.org/stable/c/5e19028667963fb371ebb00cecc2a473ef92056b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/aeb95146848d12206e1b2cfacd4f40e21ce81d94","name":"https://git.kernel.org/stable/c/aeb95146848d12206e1b2cfacd4f40e21ce81d94","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f14609d8146707452e0822f3c8154674ce677251","name":"https://git.kernel.org/stable/c/f14609d8146707452e0822f3c8154674ce677251","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d81b323af2dcee47573907ccb89c0df9b45cb2e2","name":"https://git.kernel.org/stable/c/d81b323af2dcee47573907ccb89c0df9b45cb2e2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/96b72672ce849a1402730238e64d9b20bf06a96d","name":"https://git.kernel.org/stable/c/96b72672ce849a1402730238e64d9b20bf06a96d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-63926","name":"CVE 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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."}],"metrics":[{"cvssV3_1":{"baseScore":8.4,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-07-20T13:41:36.086Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/f14609d8146707452e0822f3c8154674ce677251"},{"url":"https://git.kernel.org/stable/c/d81b323af2dcee47573907ccb89c0df9b45cb2e2"},{"url":"https://git.kernel.org/stable/c/aeb95146848d12206e1b2cfacd4f40e21ce81d94"},{"url":"https://git.kernel.org/stable/c/96b72672ce849a1402730238e64d9b20bf06a96d"},{"url":"https://git.kernel.org/stable/c/3075c21d2d76c0067f4a382765b43d6cc10470f1"},{"url":"https://git.kernel.org/stable/c/5e19028667963fb371ebb00cecc2a473ef92056b"},{"url":"https://git.kernel.org/stable/c/63f64a510c7917658ddf4d073ece73914ee25346"},{"url":"https://git.kernel.org/stable/c/f72eed9b84fb771019a955908132410a9ba9ea3f"}],"title":"bpf: sockmap: fix tail fragment offset in bpf_msg_push_data","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-63926","datePublished":"2026-07-19T14:55:27.154Z","dateReserved":"2026-07-19T07:54:57.021Z","dateUpdated":"2026-07-20T13:41:36.086Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-19 16:17:10","lastModifiedDate":"2026-07-20 15:16:57","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":8.4,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.5,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"63926","Ordinal":"1","Title":"bpf: sockmap: fix tail fragment offset in bpf_msg_push_data","CVE":"CVE-2026-63926","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"63926","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"bpf: sockmap: fix tail fragment offset in bpf_msg_push_data"}]}}}