Vulnerability Description
7-Zip is a file archiver with a high compression ratio. Versions 9.18 through 26.00 contain a heap out-of-bounds read in 7-Zip Ar handler BSD SYMDEF parser. A 4-byte heap out-of-bounds read exists in the Unix ar archive parser in 7-Zip. When parsing a BSD-style __.SYMDEF symbol table, the ParseLibSymbols function reads a 32-bit namesSize field via Get32 at a position that can equal the buffer size, reading 4 bytes past the end of the heap allocation. This reads uninitialized heap data under the default allocator. Version 26.01 patches the issue.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| 7-Zip | 7-Zip | >= 9.34, < 26.01 |
Related Weaknesses (CWE)
References
- https://securitylab.github.com/advisories/GHSL-2026-115_GHSL-2026-122_7-zip/ExploitPatchThird Party Advisory
FAQ
What is CVE-2026-48112?
CVE-2026-48112 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 7-Zip is a file archiver with a high compression ratio. Versions 9.18 through 26.00 contain a heap out-of-bounds read in 7-Zip Ar handler BSD SYMDEF parser. A 4-byte heap out-of-bounds read exists in ...
How severe is CVE-2026-48112?
CVE-2026-48112 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-48112?
Check the references section above for vendor advisories and patch information. Affected products include: 7-Zip 7-Zip.