CVE-2026-74305

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-74305

Key Details

CVE	CVE-2026-74305
CVSS Score / Version	7.8 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-74305
CVE	https://www.cve.org/CVERecord?id=CVE-2026-74305

Source

Reference

NVD

CVE