SB2026081273 - Memory leak in Linux kernel btrfs

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2026081273

SB2026081273 - Memory leak in Linux kernel btrfs

Published: August 12, 2026

Security Bulletin ID SB2026081273
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) Memory leak (CVE-ID: CVE-2026-68450)

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

CVSSv4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/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 memory leak in __add_reloc_root() in fs/btrfs/relocation.c when inserting a relocation root into reloc_root_tree and encountering an unexpected duplicate entry. A local user can trigger the duplicate insert path to cause a denial of service.

This issue occurs because a newly allocated mapping node is left unfreed if insertion finds an existing entry and returns -EEXIST.


Remediation

Install update from vendor's website.

References