SB2026091881 - Race condition in Linux kernel bpf

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Main Vulnerability Database SB2026091881

SB2026091881 - Race condition in Linux kernel bpf

Published: September 18, 2026

Security Bulletin ID SB2026091881
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Race condition (CVE-ID: CVE-2026-93138)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a local user to access incompletely initialized vmlinux BTF data.

The vulnerability exists due to a race condition in bpf_get_btf_vmlinux when concurrently invoking the function during first-time vmlinux BTF parsing. A local user can invoke the affected function concurrently to access incompletely initialized vmlinux BTF data.

The race can occur on weakly ordered architectures when CONFIG_DEBUG_INFO_BTF is enabled.


Remediation

Install update from vendor's website.

References