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CVE-2026-74305

Updated on 15 Aug 2026

Severity

7.8 High severity

Details

CVSS score
7.8
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Links
NISTCIRCLRHELUbuntu

Overview

About vulnerability

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.

Details

Affected product:
AlmaLinux 9.2 ESU , Debian 10 ELS , TuxCare 9.6 ESU , TuxCare 9.8 ESU , Ubuntu 20.04 ELS
Affected packages:
linux @ 4.19.0 (+4 more)

Fixes

KernelCare state

Live-patch status from KernelCare for each operating system.

Operating system Status Covered kernels
Amazon Linux 2023 Planned —
Debian 12 Released
12 kernels
  • 6.1.177-1
  • 6.1.153-1
  • 6.1.158-1
  • 6.1.159-1
  • 6.1.162-1
  • 6.1.164-1
  • 6.1.170-1
  • 6.1.170-3
  • 6.1.172-1
  • 6.1.174-1
  • 6.1.170-2
  • 6.1.176-1
Debian 13 Released
13 kernels
  • 6.12.85-1
  • 6.12.86-1
  • 6.12.88-1
  • 6.12.74-2
  • 6.12.73-1
  • 6.12.63-1
  • 6.12.69-1
  • 6.12.74-1
  • 6.12.90-1
  • 6.12.90-2
  • 6.12.94-1
  • 6.12.95-1
  • 6.12.96-1
Oracle Linux 8 UEK 7 Released
34 kernels
  • 5.15.0-314.193.5.3.el8uek
  • 5.15.0-314.193.5.4.el8uek
  • 5.15.0-314.193.5.5.el8uek
  • 5.15.0-315.196.5.1.el8uek
  • 5.15.0-315.196.5.2.el8uek
  • 5.15.0-316.196.4.1.el8uek
  • 5.15.0-316.196.4.2.el8uek
  • 5.15.0-317.197.5.1.el8uek
  • 5.15.0-317.197.5.2.el8uek
  • 5.15.0-318.199.3.2.el8uek
  • 5.15.0-318.199.3.2.1.el8uek
  • 5.15.0-319.201.4.2.el8uek
  • 5.15.0-319.201.4.3.el8uek
  • 5.15.0-319.201.4.4.el8uek
  • 5.15.0-319.201.4.6.el8uek
  • 5.15.0-320.202.8.2.el8uek
  • 5.15.0-320.202.8.3.el8uek
  • 5.15.0-320.202.8.4.el8uek
  • 5.15.0-320.202.8.5.el8uek
  • 5.15.0-318.199.3.6.el8uek
  • 5.15.0-321.202.5.el8uek
  • 5.15.0-321.202.5.1.el8uek
  • 5.15.0-321.202.5.2.el8uek
  • 5.15.0-321.202.5.3.el8uek
  • 5.15.0-322.203.3.2.el8uek
  • 5.15.0-322.203.3.3.el8uek
  • 5.15.0-322.203.3.4.el8uek
  • 5.15.0-322.203.3.4.5.el8uek
  • 5.15.0-318.199.3.7.el8uek
  • 5.15.0-322.203.3.5.el8uek
  • 5.15.0-322.203.3.4.1.el8uek
  • 5.15.0-323.211.3.3.el8uek
  • 5.15.0-323.211.3.4.el8uek
  • 5.15.0-323.211.3.5.el8uek
Oracle Linux 9 UEK 7 Released
34 kernels
  • 5.15.0-314.193.5.3.el9uek
  • 5.15.0-314.193.5.4.el9uek
  • 5.15.0-314.193.5.5.el9uek
  • 5.15.0-315.196.5.1.el9uek
  • 5.15.0-315.196.5.2.el9uek
  • 5.15.0-316.196.4.1.el9uek
  • 5.15.0-316.196.4.2.el9uek
  • 5.15.0-317.197.5.1.el9uek
  • 5.15.0-317.197.5.2.el9uek
  • 5.15.0-318.199.3.2.el9uek
  • 5.15.0-318.199.3.2.1.el9uek
  • 5.15.0-319.201.4.2.el9uek
  • 5.15.0-319.201.4.3.el9uek
  • 5.15.0-319.201.4.4.el9uek
  • 5.15.0-319.201.4.6.el9uek
  • 5.15.0-320.202.8.2.el9uek
  • 5.15.0-320.202.8.3.el9uek
  • 5.15.0-320.202.8.4.el9uek
  • 5.15.0-320.202.8.5.el9uek
  • 5.15.0-318.199.3.6.el9uek
  • 5.15.0-321.202.5.el9uek
  • 5.15.0-321.202.5.1.el9uek
  • 5.15.0-321.202.5.2.el9uek
  • 5.15.0-321.202.5.3.el9uek
  • 5.15.0-322.203.3.2.el9uek
  • 5.15.0-322.203.3.3.el9uek
  • 5.15.0-322.203.3.4.el9uek
  • 5.15.0-322.203.3.4.5.el9uek
  • 5.15.0-318.199.3.7.el9uek
  • 5.15.0-322.203.3.5.el9uek
  • 5.15.0-322.203.3.4.1.el9uek
  • 5.15.0-323.211.3.3.el9uek
  • 5.15.0-323.211.3.4.el9uek
  • 5.15.0-323.211.3.5.el9uek
Ubuntu 22.04 Planned —
Ubuntu 22.04 AWS Planned —
Ubuntu 22.04 Azure Planned —
Ubuntu 24.04 Planned —
Ubuntu 24.04 AWS Planned —
Ubuntu 26.04 In Rollout
2 kernels
  • 7.0.0-31.31
  • 7.0.0-34.34