SB20260905150 - Infinite loop in Linux kernel ext4

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Main Vulnerability Database SB20260905150

SB20260905150 - Infinite loop in Linux kernel ext4

Published: September 5, 2026

Security Bulletin ID SB20260905150
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) Infinite loop (CVE-ID: CVE-2026-80808)

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/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 infinite retry loop in ext4_xattr_block_set() when reusing a saturated extended attribute cache entry on a corrupted filesystem. A local user can trigger repeated selection of the unusable cache entry to cause a denial of service.

Concurrent rmdir callers can remain blocked while the spinning task holds the parent directory's i_rwsem.


Remediation

Install update from vendor's website.

References