Vulnerability 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.
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
- https://securitylab.github.com/advisories/GHSL-2026-115_GHSL-2026-122_7-zip/ExploitPatchThird Party Advisory
FAQ
What is CVE-2026-48092?
CVE-2026-48092 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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 over...
How severe is CVE-2026-48092?
CVE-2026-48092 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-48092?
Check the references section above for vendor advisories and patch information. Affected products include: 7-Zip 7-Zip.