Out-of-bounds Read Affecting libarchive package, versions <3.8.7-r2


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
1.11% (66th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-LIBARCHIVE-16698242
  • published15 May 2026
  • disclosed19 Mar 2026

Introduced: 19 Mar 2026

CVE-2026-4424  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade Chainguard libarchive to version 3.8.7-r2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libarchive package and not the libarchive package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

A flaw was found in libarchive. This heap out-of-bounds read vulnerability exists in the RAR archive processing logic due to improper validation of the LZSS sliding window size after transitions between compression methods. A remote attacker can exploit this by providing a specially crafted RAR archive, leading to the disclosure of sensitive heap memory information without requiring authentication or user interaction.

References

CVSS Base Scores

version 3.1