CVE-2026-43239: smb: client: prevent races in ->query_interfaces()
In the Linux kernel, the following vulnerability has been resolved:
smb: client: prevent races in ->queryinterfaces()
It was possible for two query interface works to be concurrently trying to update the interfaces.
Prevent this by checking and updating ifacelastupdate under ifacelock.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-43239?
CVE-2026-43239 is classified as a moderate severity vulnerability in the Linux kernel.
How do I fix CVE-2026-43239?
To fix CVE-2026-43239, update your Linux kernel to the latest version that contains the patch.
What systems are affected by CVE-2026-43239?
CVE-2026-43239 affects all modern versions of the Linux kernel that include the SMB client.
What is the impact of CVE-2026-43239?
The impact of CVE-2026-43239 includes possible race conditions during interface queries that may lead to performance issues.
Who is responsible for addressing CVE-2026-43239?
The maintainers of the Linux kernel are responsible for addressing CVE-2026-43239 through regular updates and patches.