CVE-2025-53816

GHSL-2025-058 - 7-Zip Multi-byte write heap buffer overflow in NCompress::NRar5::CDecoder

State: Published
Severity: 5.5 Medium
Published: Jul 17, 2025
Updated: May 11, 2026
Reserved: Jul 9, 2025

Description

7-Zip is a file archiver with a high compression ratio. Zeroes written outside heap buffer in RAR5 handler may lead to memory corruption and denial of service in versions of 7-Zip prior to 25.0.0. Version 25.0.0 contains a fix for the issue.

Scores

CVSS	Score	Vector	Source
4.0	5.5 Medium	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P	GitHub_M

Weaknesses

CWE-122 Heap-based Buffer Overflow

Affected Products

Product	Versions
7-Zipipavlov	< 25.0.0Affected

References

https://securitylab.github.com/advisories/GHSL-2025-058_7-Zip/
https://www.openwall.com/lists/oss-security/2025/07/18/1
http://www.openwall.com/lists/oss-security/2025/07/18/1
https://lists.debian.org/debian-lts-announce/2026/05/msg00021.html

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