fs: init flags_valid before calling vfs_fileattr_get

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Summary

CVECVE-2026-43474
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-08 15:17:00 UTC
Updated2026-05-12 14:10:27 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: fs: init flags_valid before calling vfs_fileattr_get syzbot reported a uninit-value bug in [1]. Similar to the "*get" context where the kernel's internal file_kattr structure is initialized before calling vfs_fileattr_get(), we should use the same mechanism when using fa. [1] BUG: KMSAN: uninit-value in fuse_fileattr_get+0xeb4/0x1450 fs/fuse/ioctl.c:517 fuse_fileattr_get+0xeb4/0x1450 fs/fuse/ioctl.c:517 vfs_fileattr_get fs/file_attr.c:94 [inline] __do_sys_file_getattr fs/file_attr.c:416 [inline] Local variable fa.i created at: __do_sys_file_getattr fs/file_attr.c:380 [inline] __se_sys_file_getattr+0x8c/0xbd0 fs/file_attr.c:372

Risk And Classification

EPSS: 0.000170000 probability, percentile 0.041290000 (date 2026-05-11)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected be7efb2d20d67f334a7de2aef77ae6c69367e646 379e19e820dd1c6145426b97467728b3b89c0b42 git Not specified
CNA Linux Linux affected be7efb2d20d67f334a7de2aef77ae6c69367e646 b8c182b2c8c44c6016b11d8af61715ad7ef958a1 git Not specified
CNA Linux Linux affected be7efb2d20d67f334a7de2aef77ae6c69367e646 cb184dd19154fc486fa3d9e02afe70a97e54e055 git Not specified
CNA Linux Linux affected 6.17 Not specified
CNA Linux Linux unaffected 6.17 semver Not specified
CNA Linux Linux unaffected 6.18.19 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.9 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/cb184dd19154fc486fa3d9e02afe70a97e54e055 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b8c182b2c8c44c6016b11d8af61715ad7ef958a1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/379e19e820dd1c6145426b97467728b3b89c0b42 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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