| Name | CVE-2026-48092 |
| Description | 7-Zip is a file archiver with a high compression ratio. Versions 9.34 through 26.00 contain a heap memory disclosure via SquashFS fragment offset integer overflow on 32-bit builds. 32-bit integer overflow in the SquashFS ReadBlock function allows an attacker-controlled node.Offset value to bypass the fragment bounds check, causing memcpy to read heap memory preceding the cache buffer into the extracted file. The vulnerability is exploitable only on 32-bit builds of 7-Zip where size_t is 32 bits, allowing the addition offsetInBlock + blockSize to wrap modulo 2³². On 64-bit builds the addition is promoted to 64 bits and the check correctly rejects the input. Version 26.01 patches the issue. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| 7zip (PTS) | bookworm | 22.01+really25.01+dfsg-0+deb12u1 | vulnerable |
| trixie | 25.01+dfsg-1~deb13u2 | vulnerable |
| forky, sid | 26.01+dfsg-2 | fixed |
| p7zip (PTS) | bullseye | 16.02+dfsg-8 | vulnerable |
| bullseye (security) | 16.02+really25.01+dfsg-0+deb11u1 | vulnerable |
| bookworm | 16.02+really25.01+dfsg-0+deb12u1 | vulnerable |
| trixie | 16.02+transitional.1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| 7zip | source | (unstable) | 26.01+dfsg-1 | unimportant | | |
| p7zip | source | (unstable) | 16.02+transitional.1 | unimportant | | |
Notes
Since p7zip/16.02+transitional.1 src:p7zip is only a empty source package
depending on 7zip. Mark this version as fixed version.
https://securitylab.github.com/advisories/GHSL-2026-115_GHSL-2026-122_7-zip/
Crash in CLI tool, no security impact