Buffer overflow in Libarchive
CVE-2025-5915
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.6 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:H.
EPSS exploit prediction
EPSS: 0.002 (7.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 7.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Libarchive
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat In-Vehicle Operating System 1
- Red Hat Openshift Container Platform 4
- Red Hat Enterprise Linux — versions 6.0, 7.0, 8.0
- Red Hat Openshift Container Platform — versions 4.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- access.redhat.com/security/cve/CVE-2025-5915 (vdb-entry, Vendor Advisory)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Issue Tracking)
- github.com/libarchive/libarchive/pull/2599 (Patch)
- github.com/libarchive/libarchive/releases/tag/v3.8.0 (Release Notes)
Frequently asked questions
- What is CVE-2025-5915?
- CVE-2025-5915 is a medium-severity vulnerability in Libarchive, classified under Heap-based Buffer Overflow. CVSS score: 6.6/10. Published 2025-06-09.
- How severe is CVE-2025-5915?
- Medium severity. CVSS v3 base score is 6.6 out of 10.
- Is CVE-2025-5915 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.