CVE-2026-43262: gfs2: fiemap page fault fix
In the Linux kernel, the following vulnerability has been resolved:
gfs2: fiemap page fault fix
In gfs2fiemap(), we are calling iomapfiemap() while holding the inode glock. This can lead to recursive glock taking if the fiemap buffer is memory mapped to the same inode and accessing it triggers a page fault.
Fix by disabling page faults for iomapfiemap() and faulting in the buffer by hand if necessary.
Fixes xfstest generic/742.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2026-43262?
CVE-2026-43262 has been classified with a high severity due to the potential for recursive glock taking.
How do I fix CVE-2026-43262?
To fix CVE-2026-43262, update the Linux kernel to a patched version that resolves the gfs2 fiemap issue.
Which versions of Linux are affected by CVE-2026-43262?
CVE-2026-43262 affects multiple versions of the Linux kernel, specifically between versions 2.6.29 up to 6.19.
What is the impact of CVE-2026-43262?
The impact of CVE-2026-43262 includes the potential for system instability and data corruption due to recursive locking behavior.
Is there a workaround for CVE-2026-43262 until I can update?
Currently, there is no specified workaround for CVE-2026-43262, so it is recommended to apply the kernel update as soon as possible.