{"apiVersion":"1.0","identifier":"CVE-2026-74305","description":"In the Linux kernel, the following vulnerability has been resolved: bpf: Tighten cgroup storage cookie checks for prog arrays The fix in commit abad3d0bad72 (-bpf: Fix oob access in cgroup local storage-) is still incomplete. The prog-array compatibility check treats a program with no cgroup storage as compatible with any stored storage cookie. This allows a storage-less program to bridge a tail call chain between an entry program and a storage-using callee even though cgroup local storage at runtime still follows the caller-s context, that is, A -> B(no storage) -> C(storage) path. Requiring exact cookie equality would break the legitimate case of a storage-less leaf program being tail called from a storage-using one. Instead, only accept a zero storage cookie if the program cannot perform tail calls itself. This keeps A -> B(no storage) working while rejecting the A -> B(no storage) -> C(storage) bridge.","publishedAt":"2026-08-15T06:22:30","lastModifiedAt":"2026-08-17T06:19:24","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74305","cvssScore":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","epssProbability":0.00129,"riskScore":0.79,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-74305","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-74305","en":"https://www.redsauce.net/en/cves/CVE-2026-74305","fr":"https://www.redsauce.net/fr/cves/CVE-2026-74305","pt":"https://www.redsauce.net/pt/cves/CVE-2026-74305","de":"https://www.redsauce.net/de/cves/CVE-2026-74305","sk":"https://www.redsauce.net/sk/cves/CVE-2026-74305","el":"https://www.redsauce.net/el/cves/CVE-2026-74305"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-74305"}}