SB20260812359 - Out-of-bounds read in Linux kernel fs

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Main Vulnerability Database SB20260812359

SB20260812359 - Out-of-bounds read in Linux kernel fs

Published: August 12, 2026

Security Bulletin ID SB20260812359
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) Out-of-bounds read (CVE-ID: CVE-2026-68187)

CWE-ID: CWE-125 - Out-of-bounds read

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 an out-of-bounds read in transfer_args_to_stack() when processing execve arguments on affected no-MMU builds. A local user can supply an excessively long argument or environment string to trigger the faulty loop behavior and cause a denial of service.

Only CONFIG_MMU=n builds are affected, and the vulnerable code path is used by binfmt_flat and binfmt_elf_fdpic.


Remediation

Install update from vendor's website.

References