CVE-2026-48112
6.5
MEDIUM
CVSS 3.1
EPSS 0.27%
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.
How to fix CVE-2026-48112
To remediate CVE-2026-48112, upgrade the affected package to a fixed version below.
- —upgrade to 22.01+really26.01+dfsg-0+deb12u1 or later
- —upgrade to 16.02+really26.01+dfsg-0+deb11u1 or later
Is CVE-2026-48112 being exploited?
Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 22.01+really26.01+dfsg-0+deb12u1
- from 0, < 16.02+really26.01+dfsg-0+deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |