Linux Kernel gfs2 Fiemap Recursion Glock Issue
CVE-2026-43262 Published on May 6, 2026
gfs2: fiemap page fault fix
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.
Products Associated with CVE-2026-43262
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Affected Versions
Linux:- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 5d5d9ec957bfa1eb2b05861c19f5d701dd006db7 is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below cead3bebf3e318578b8a86a5472015d713d2a8a8 is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below e428670cfb2993d8c224effd076242ca6b0950de is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 5d2c4f182ea8516de8682e2b60411c03df00e3ea is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 2e121c53b581e40397ae08090a7af4ed10781fbc is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 9d15fee888f0e8938c9aeed71ec9c2cbba0c88ab is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below e411d74cc5ba290f85d0dd5e4d1df8f1d6d975d2 is affected.
- Version 5.15.202, <= 5.15.* is unaffected.
- Version 6.1.165, <= 6.1.* is unaffected.
- Version 6.6.128, <= 6.6.* is unaffected.
- Version 6.12.75, <= 6.12.* is unaffected.
- Version 6.18.16, <= 6.18.* is unaffected.
- Version 6.19.6, <= 6.19.* is unaffected.
- Version 7.0, <= * is unaffected.