What’s Vulnerable › Vulnerabilities

CVE-2024-39468: smb: client: fix deadlock in smb2_find_smb_tcon()

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-06-25 · updated 2026-10-15
• Weakness: CWE-667

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.

Affected products

• Linux kernel: before 5.10.221; from 5.11 before 5.15.162; from 5.16 before 6.1.94; from 6.2 before 6.6.34; from 6.7 before 6.9.5; 6.10-rc1, 6.10-rc2 — fixed in 5.10.221, 5.15.162, 6.1.94, 6.6.34, 6.9.5

How to fix

Upgrade to a fixed version: Linux kernel 5.10.221, 5.15.162, 6.1.94, 6.6.34. Check the vendor advisory for mitigations.

References

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

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