{"cve":"CVE-2026-74305","nvd":{"published":"2026-08-15T06:22:30.190","modified":"2026-10-16T19:17:38.187","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Tighten cgroup storage cookie checks for prog arrays\n\nThe fix in commit abad3d0bad72 (\"bpf: Fix oob access in cgroup local\nstorage\") is still incomplete. The prog-array compatibility check\ntreats a program with no cgroup storage as compatible with any stored\nstorage cookie. This allows a storage-less program to bridge a tail\ncall chain between an entry program and a storage-using callee even\nthough cgroup local storage at runtime still follows the caller's\ncontext, that is, A -> B(no storage) -> C(storage) path.\n\nRequiring exact cookie equality would break the legitimate case of a\nstorage-less leaf program being tail called from a storage-using one.\nInstead, only accept a zero storage cookie if the program cannot\nperform tail calls itself. This keeps A -> B(no storage) working\nwhile rejecting the A -> B(no storage) -> C(storage) bridge.","cvss_v4":null,"cvss_v3":{"version":"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},"cwes":[],"references":["https://git.kernel.org/stable/c/10627ddc0167aab5c1c390a10ef461e9937aba08","https://git.kernel.org/stable/c/1c762d28698483ce7c372091f34d86e4d4828652","https://git.kernel.org/stable/c/46fbafe3d2d569d828e8d24a7dbe1659f63685cf","https://git.kernel.org/stable/c/87177497cca90bf4fcfb759eb898560eb5b46a10","https://git.kernel.org/stable/c/9ca06849c4239aa2d580c54651f8588c51cb398b"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:48:17.459049833+00:00"},"epss":{"cve":"CVE-2026-74305","score":0.00176,"percentile":0.07045,"date":"2026-10-26"},"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."]}