SB20260816352 - Race condition in Linux kernel 9p

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Main Vulnerability Database SB20260816352

SB20260816352 - Race condition in Linux kernel 9p

Published: August 16, 2026

Security Bulletin ID SB20260816352
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Partial DoS

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Race condition (CVE-ID: CVE-2026-72170)

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

CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]


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

The vulnerability exists due to a race condition in v9fs_dec_count in the 9p filesystem inode handling code when processing unlink operations in cacheless mode. A local user can trigger heavy unlink workloads to cause a kernel warning and system instability.

Only systems using the 9p filesystem in cacheless mode are affected.


Remediation

Install update from vendor's website.

References