SB20260320116 - Loop with Unreachable Exit Condition ('Infinite Loop') in Linux kernel ntfs3

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Main Vulnerability Database SB20260320116

SB20260320116 - Loop with Unreachable Exit Condition ('Infinite Loop') in Linux kernel ntfs3

Published: March 20, 2026

Security Bulletin ID SB20260320116
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 security vulnerability.


1) Loop with Unreachable Exit Condition ('Infinite Loop') (CVE-ID: CVE-2025-71265)

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

The vulnerability exists due to an infinite loop in the ntfs3 file system's attr_load_runs_range function when processing inconsistent metadata. A local attacker can provide a malformed NTFS image to cause a denial of service.

The attacker-controlled NTFS image contains inconsistent metadata where an attribute header indicates an empty run list (evcn=-1 with svcn=0), but directory entries reference it as containing data. After a successful but empty run_unpack() call, the runs_tree remains uninitialized, causing subsequent run_lookup_entry() calls to fail and vcn to increment by zero, resulting in an infinite loop.


Remediation

Install update from vendor's website.

References