CVE-2026-48112
Medium
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.
SeverityMedium
CVSS6.5
Exploit probability—
Product7-zip
PublishedJun 5, 2026
First seenJun 5, 2026
Weakness typeCWE-190Integer overflowCWE-125Out-of-bounds read
How to fix
Update
- 7-zip 7-zip26.01 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| 7-zip 7-zip | 9.34 ≤ v < 26.01 | 26.01 |
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