# CVE-2025-68806: ksmbd: fix buffer validation by including null terminator size in EA length

CVE-2025-68806 is fixed in linux on 1 platform, first by DEBIAN-CVE-2025-68806, released January 13, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-68806
- Priority: High
- CVSS: 7.5 (Moderate)
- EPSS: 0.0045
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 13, 2026
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-68806

## Description

In the Linux kernel, the following vulnerability has been resolved:  ksmbd: fix buffer validation by including null terminator size in EA length  The smb2_set_ea function, which handles Extended Attributes (EA), was performing buffer validation checks that incorrectly omitted the size of the null terminating character (+1 byte) for EA Name. This patch fixes the issue by explicitly adding '+ 1' to EaNameLength where the null terminator is expected to be present in the buffer, ensuring the validation accurately reflects the total required buffer size.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.162-1 | [DEBIAN-CVE-2025-68806](https://patchblox.com/security/data/fix/linux/debian-cve-2025-68806.md) | Jan 13, 2026 |
| Linux | linux Debian 13.5 (trixie) | 6.12.69-1 | [DEBIAN-CVE-2025-68806](https://patchblox.com/security/data/fix/linux/debian-cve-2025-68806.md) | Jan 13, 2026 |
| Linux | linux Debian 14 | 6.18.3-1 | [DEBIAN-CVE-2025-68806](https://patchblox.com/security/data/fix/linux/debian-cve-2025-68806.md) | Jan 13, 2026 |

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Data as of 2026-11-09T07:25:28Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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