# CVE-2023-40481: 7zip: 7-Zip SquashFS File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability

CVE-2023-40481 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2023-40481, released May 3, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-40481
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.1384
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 3, 2024

## Description

7-Zip SquashFS File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of 7-Zip. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.  The specific flaw exists within the parsing of SQFS files. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-18589.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | 7zip Debian 12.15 (bookworm) | 22.01+really25.01+dfsg-0+deb12u1 | [DEBIAN-CVE-2023-40481](https://patchblox.com/security/data/fix/linux/debian-cve-2023-40481.md) | May 3, 2024 |
| Linux | 7zip Debian 13.5 (trixie) | 23.01+dfsg-1 | [DEBIAN-CVE-2023-40481](https://patchblox.com/security/data/fix/linux/debian-cve-2023-40481.md) | May 3, 2024 |
| Linux | 7zip Debian 14 | 23.01+dfsg-1 | [DEBIAN-CVE-2023-40481](https://patchblox.com/security/data/fix/linux/debian-cve-2023-40481.md) | May 3, 2024 |
| Linux | p7zip Debian 12.15 (bookworm) | 16.02+really25.01+dfsg-0+deb12u1 | [DEBIAN-CVE-2023-40481](https://patchblox.com/security/data/fix/linux/debian-cve-2023-40481.md) | May 3, 2024 |
| Linux | p7zip Debian 13.5 (trixie) | 16.02+transitional.1 | [DEBIAN-CVE-2023-40481](https://patchblox.com/security/data/fix/linux/debian-cve-2023-40481.md) | May 3, 2024 |

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Data as of 2026-11-08T00:53:09Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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