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.
A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
| Link | Tags |
|---|---|
| https://securitylab.github.com/advisories/GHSL-2025-058_7-Zip/ | third party advisory exploit |
| https://www.openwall.com/lists/oss-security/2025/07/18/1 | mailing list exploit |