Bug 2467002 (CVE-2026-43117) - CVE-2026-43117 kernel: btrfs: tracepoints: get correct superblock from dentry in event btrfs_sync_file()
Summary: CVE-2026-43117 kernel: btrfs: tracepoints: get correct superblock from dentry...
Keywords:
Status: NEW
Alias: CVE-2026-43117
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: 2026-05-06 10:02 UTC by OSIDB Bzimport
Modified: 2026-05-06 14:24 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-05-06 10:02:40 UTC 
In the Linux kernel, the following vulnerability has been resolved:

btrfs: tracepoints: get correct superblock from dentry in event btrfs_sync_file()

If overlay is used on top of btrfs, dentry->d_sb translates to overlay's
super block and fsid assignment will lead to a crash.

Use file_inode(file)->i_sb to always get btrfs_sb.
Comment 1 Alexander B 2026-05-06 14:22:04 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050627-CVE-2026-43117-8e20@gregkh/T
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