CVE-2025-5915
Libarchive: heap buffer over read in copy_from_lzss_window() at archive_read_support_format_rar.c
- Published
- Jun 9, 2025
- Updated
- Sep 1, 2026
- Assigning CNA
- redhat
- Evidence observed
- Aug 6, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:HLow · next 30 days
- Percentile
- 9.1%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
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.
Sources
1Proof-of-concept exploit for a heap over-read in libarchive RAR v4 filter (CVE-2025-5915) with ASan reproduction, encoder, and on-device iOS 18.5 demonstration.
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