SB2026082898 - Improper access control in Linux kernel bpf

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Main Vulnerability Database SB2026082898

SB2026082898 - Improper access control in Linux kernel bpf

Published: August 28, 2026

Security Bulletin ID SB2026082898
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper access control (CVE-ID: CVE-2026-80669)

CWE-ID: CWE-284 - Improper Access Control

CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local privileged user to cause a denial of service.

The vulnerability exists due to improper access control in the bpf lsm hook attachment handling for xfrm_decode_session when attaching a bpf lsm program to the xfrm_decode_session hook. A local privileged user can attach a crafted bpf lsm program that returns an error to cause a denial of service.

The issue is triggered because security_skb_classify_flow() invokes the hook from a void path and reaches BUG_ON() if an error is returned.


Remediation

Install update from vendor's website.

References