SB20261110288 - Out-of-bounds read in rarfile

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB20261110288

SB20261110288 - Out-of-bounds read in rarfile

Published: November 10, 2026

Security Bulletin ID SB20261110288
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) Out-of-bounds read (CVE-ID: N/A)

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

CVSSv4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to potentially cause a denial of service by crashing an application processing a crafted RAR3 archive.

The vulnerability exists due to missing bounds checks in rarfile's RAR3Parser._parse_subblocks and RAR3Parser._load_comment functions when parsing comment lengths that exceed the available header buffer. A remote attacker can trick a victim into processing an archive containing malformed comment sub-blocks to trigger an out-of-bounds read or crash.


Remediation

Install update from vendor's website.

References