CVE-2026-43262

Summary

In the Linux kernel, the following vulnerability has been resolved:

gfs2: fiemap page fault fix

In gfs2_fiemap(), we are calling iomap_fiemap() 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 iomap_fiemap() and faulting in the buffer by hand if necessary.

Fixes xfstest generic/742.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxe9079cce201784632aed4b1a3121ee38c1ced0b6 < 5d5d9ec957bfa1eb2b05861c19f5d701dd006db7affected
LinuxLinuxe9079cce201784632aed4b1a3121ee38c1ced0b6 < cead3bebf3e318578b8a86a5472015d713d2a8a8affected
LinuxLinuxe9079cce201784632aed4b1a3121ee38c1ced0b6 < e428670cfb2993d8c224effd076242ca6b0950deaffected
LinuxLinuxe9079cce201784632aed4b1a3121ee38c1ced0b6 < 5d2c4f182ea8516de8682e2b60411c03df00e3eaaffected
LinuxLinuxe9079cce201784632aed4b1a3121ee38c1ced0b6 < 2e121c53b581e40397ae08090a7af4ed10781fbcaffected
LinuxLinuxe9079cce201784632aed4b1a3121ee38c1ced0b6 < 9d15fee888f0e8938c9aeed71ec9c2cbba0c88abaffected
LinuxLinuxe9079cce201784632aed4b1a3121ee38c1ced0b6 < e411d74cc5ba290f85d0dd5e4d1df8f1d6d975d2affected
LinuxLinux2.6.29affected
LinuxLinux0 < 2.6.29unaffected
LinuxLinux5.15.202 <= 5.15.*unaffected
LinuxLinux6.1.165 <= 6.1.*unaffected
LinuxLinux6.6.128 <= 6.6.*unaffected
LinuxLinux6.12.75 <= 6.12.*unaffected
LinuxLinux6.18.16 <= 6.18.*unaffected
LinuxLinux6.19.6 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References