CVE-2026-48092

CVE-2026-48092 · 7-Zip SquashFS Fragment Offset Overflow (GHSL-2026-116)

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 4.3 · Medium · EPSS 0.5% · Fix available

Published

2026-06-05T13:51:55.097Z

Updated

2026-06-08T17:08:54.213Z

Stack: system

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