# CVE-2023-4458: linux: A flaw was found within the parsing of extended attributes in the kernel ksmbd module

CVE-2023-4458 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-4458, released November 14, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-4458
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0085
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 14, 2024

## Description

A flaw was found within the parsing of extended attributes in the kernel ksmbd module. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this to disclose sensitive information on affected installations of Linux. Only systems with ksmbd enabled are vulnerable to this CVE.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.52-1 | [DEBIAN-CVE-2023-4458](https://patchblox.com/security/data/fix/linux/debian-cve-2023-4458.md) | Nov 14, 2024 |
| Linux | linux Debian 13.5 (trixie) | 6.5.3-1 | [DEBIAN-CVE-2023-4458](https://patchblox.com/security/data/fix/linux/debian-cve-2023-4458.md) | Nov 14, 2024 |
| Linux | linux Debian 14 | 6.5.3-1 | [DEBIAN-CVE-2023-4458](https://patchblox.com/security/data/fix/linux/debian-cve-2023-4458.md) | Nov 14, 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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