SB20260816363 - Always-Incorrect Control Flow Implementation in Linux kernel 9p

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Main Vulnerability Database SB20260816363

SB20260816363 - Always-Incorrect Control Flow Implementation in Linux kernel 9p

Published: August 16, 2026

Security Bulletin ID SB20260816363
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) Always-Incorrect Control Flow Implementation (CVE-ID: CVE-2026-72166)

CWE-ID: CWE-670 - Always-Incorrect Control Flow Implementation

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


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

The vulnerability exists due to improper signal handling in p9_client_rpc() in net/9p/client.c when handling P9_TFLUSH requests over an fd transport with no peer. A local user can trigger a fatal signal while a thread is blocked in the affected code path to cause a denial of service.

The issue can cause the affected task to sleep indefinitely and, in practice, can stall coredump handling in multi-threaded processes.


Remediation

Install update from vendor's website.

References