Description
A vulnerability has been identified in the libarchive library. This flaw can lead to a heap buffer over-read due to the size of a filter block potentially exceeding the Lempel-Ziv-Storer-Schieber (LZSS) window. This means the library may attempt to read beyond the allocated memory buffer, which can result in unpredictable program behavior, crashes (denial of service), or the disclosure of sensitive information from adjacent memory regions.
Affected products
libarchive: libarchive; redhat: openshift container platform; redhat: enterprise linux
References4
- access.redhat.com/security/cve/CVE-2025-5915 Vendor Advisory
- github.com/libarchive/libarchive/pull/2599 Patch
- bugzilla.redhat.com/show_bug.cgi?id=2370865 Issue Tracking
- github.com/libarchive/libarchive/releases/tag/v3.8.0 Release Notes
Metrics
- CVSS 3.1
-
6.6
MEDIUM
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:H - EPSS — exploit probability
- 0% percentile: 11 · as of 7 November 2026
- CWE
- CWE-122
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.