What’s Vulnerable › Vulnerabilities

CVE-2025-5916: Libarchive: integer overflow while reading warc files at archive_read_support_format_warc.c

• Severity: medium (CVSS 5.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-06-09 · updated 2026-09-01
• Weakness: CWE-190

Description

A vulnerability has been identified in the libarchive library. This flaw involves an integer overflow that can be triggered when processing a Web Archive (WARC) file that claims to have more than INT64_MAX - 4 content bytes. An attacker could craft a malicious WARC archive to induce this overflow, potentially leading to unpredictable program behavior, memory corruption, or a denial-of-service condition within applications that process such archives using libarchive. This bug affects libarchive versions prior to 3.8.0.

Affected products

• libarchive: before 3.8.0 — fixed in 3.8.0
• Red Hat Enterprise Linux: 6.0, 7.0, 8.0, 9.0, 10.0
• Red Hat OpenShift Container Platform 4.18: 4.0

How to fix

Upgrade to a fixed version: libarchive 3.8.0. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/security/cve/CVE-2025-5916
• https://bugzilla.redhat.com/show_bug.cgi?id=2370872
• https://github.com/libarchive/libarchive/pull/2568
• https://github.com/libarchive/libarchive/releases/tag/v3.8.0

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