CVE-2024-39468: smb: client: fix deadlock in smb2_find_smb_tcon()
In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix deadlock in smb2findsmbtcon()
Unlock cifstcpseslock before calling cifsputsmbses() to avoid such deadlock.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
linux/Kernelto a version that resolves this vulnerability.Fixed in 5.15.162 - Upgrade
Upgrade
linux/Kernelto a version that resolves this vulnerability.Fixed in 6.1.94 - Upgrade
Upgrade
linux/Kernelto a version that resolves this vulnerability.Fixed in 6.6.34 - Upgrade
Upgrade
linux/Kernelto a version that resolves this vulnerability.Fixed in 6.9.5 - Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 6.1.94-1 - Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 6.9.7-1 - Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.107-1Fixed in 6.12.115-2Fixed in 7.2.12-1Fixed in 7.2.15-1 - Configuration
In the smb client code path smb2_find_smb_tcon(), update the implementation to unlock cifs_tcp_ses_lock before calling cifs_put_smb_ses() to avoid deadlock.
Linux kernel (smb client) cifs_tcp_ses_lock locking/unlocking order = Unlock cifs_tcp_ses_lock before calling cifs_put_smb_ses()
Event History
Frequently Asked Questions
What is the severity of CVE-2024-39468?
CVE-2024-39468 has a medium severity rating due to its potential to cause deadlock in the Linux kernel SMB client.
How do I fix CVE-2024-39468?
To fix CVE-2024-39468, upgrade to the patched versions of the Linux kernel specified in the vulnerability's advisory.
What systems are affected by CVE-2024-39468?
CVE-2024-39468 affects multiple versions of the Linux kernel from 5.10 to 6.10-rc2.
Is there a known exploit for CVE-2024-39468?
As of now, there is no public exploit reported for CVE-2024-39468, but it is essential to apply the available patches.
What does CVE-2024-39468 impact?
CVE-2024-39468 impacts the SMB (Server Message Block) functionality within the Linux kernel, potentially causing system deadlocks.