# CVE-2026-48092: 7zip: 7-Zip is a file archiver with a high compression ratio

CVE-2026-48092 is fixed in 2 products on 1 platform, first by SUSE-SU-2026:22347-1, released June 23, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-48092
- Priority: High
- CVSS: 8.1 (high)
- EPSS: 0.0274
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 5, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | 7zip Debian 12.15 (bookworm) | 22.01+really26.01+dfsg-0+deb12u1 | [DEBIAN-CVE-2026-48092](https://patchblox.com/security/data/fix/linux/debian-cve-2026-48092.md) | Jun 24, 2026 |
| Linux | 7zip Debian 14 | 26.01+dfsg-1 | [DEBIAN-CVE-2026-48092](https://patchblox.com/security/data/fix/linux/debian-cve-2026-48092.md) | Jun 24, 2026 |
| Linux | 7zip opensuse-leap 16.0 | 26.01-160000.1.1 | [OPENSUSE-SU-2026:21038-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21038-1.md) | Jun 23, 2026 |
| Linux | 7zip sles 15.6 | 26.01-150400.9.6.1 | [SUSE-SU-2026:2696-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2696-1.md) | Jun 30, 2026 |
| Linux | 7zip sles 15.7 | 26.01-150400.9.6.1 | [SUSE-SU-2026:2696-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2696-1.md) | Jun 30, 2026 |
| Linux | 7zip sles 16.0 | 26.01-160000.1.1 | [SUSE-SU-2026:22347-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22347-1.md) | Jun 23, 2026 |
| Linux | p7zip Debian 12.15 (bookworm) | 16.02+really26.01+dfsg-0+deb12u1 | [DEBIAN-CVE-2026-48092](https://patchblox.com/security/data/fix/linux/debian-cve-2026-48092.md) | Jun 24, 2026 |
| Linux | p7zip Debian 13.5 (trixie) | 16.02+transitional.1 | [DEBIAN-CVE-2026-48092](https://patchblox.com/security/data/fix/linux/debian-cve-2026-48092.md) | Jun 24, 2026 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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