{"cve":"CVE-2026-63926","nvd":{"published":"2026-07-19T16:17:10.913","modified":"2026-10-22T15:19:52.250","status":"Analyzed","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.","cvss_v4":null,"cvss_v3":{"version":"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},"cwes":["CWE-681","CWE-190"],"references":["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/96b72672ce849a1402730238e64d9b20bf06a96d","https://git.kernel.org/stable/c/aeb95146848d12206e1b2cfacd4f40e21ce81d94"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-22T16:41:11.231219466+00:00"},"epss":{"cve":"CVE-2026-63926","score":0.00186,"percentile":0.08079,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}