{"cve":"CVE-2026-72423","nvd":{"published":"2026-08-15T06:22:16.117","modified":"2026-10-21T13:19:37.777","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Guard conntrack opts error writes\n\nThe conntrack lookup and allocation kfuncs take an opts pointer\ntogether with an opts__sz argument. The verifier checks only the memory\nrange described by opts__sz, but the wrappers unconditionally write\nopts->error whenever the internal lookup or allocation helper returns an\nerror.\n\nFor an invalid size smaller than the end of opts->error, that write can\nland outside the verifier-checked range. Keep returning NULL for invalid\narguments, but only report the error through opts->error when the\nsupplied size includes the field.\n\nThis preserves error reporting for the supported 12-byte and 16-byte\nlayouts, and for other invalid sizes that still include opts->error.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","score":8.8},"cwes":[],"references":["https://git.kernel.org/stable/c/453f4f1e90de55b6bc297936031b68bef93f2e28","https://git.kernel.org/stable/c/63d95c6bbd6fc0e411404188306a1fea456300b0","https://git.kernel.org/stable/c/669bc3b345712112d3f033a1953f5a10b15e7c65","https://git.kernel.org/stable/c/6f6183a39533d727deaa5061cadae6dd9e6744d0","https://git.kernel.org/stable/c/dd74c80203842a21b2ebb9f70d1260d9aa20fa05"],"products":[],"source":"nvd","synced_at":"2026-10-22T16:41:11.231219466+00:00"},"epss":{"cve":"CVE-2026-72423","score":0.00175,"percentile":0.0695,"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."]}