Bug 2502407 (CVE-2026-63954) - CVE-2026-63954 kernel: hpfs: fix a crash if hpfs_map_dnode_bitmap fails
Summary: CVE-2026-63954 kernel: hpfs: fix a crash if hpfs_map_dnode_bitmap fails
Keywords:
Status: NEW
Alias: CVE-2026-63954
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-19 16:06 UTC by OSIDB Bzimport
Modified: 2026-07-21 22:25 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-07-19 16:06:30 UTC 
In the Linux kernel, the following vulnerability has been resolved:

hpfs: fix a crash if hpfs_map_dnode_bitmap fails

If hpfs_map_dnode_bitmap fails, the code would call hpfs_brelse4 on
uninitialized quad buffer head, causing a crash.
Comment 1 Keith Grant 2026-07-21 22:23:37 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026071955-CVE-2026-63954-d2b4@gregkh/T
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