CVE-2026-43117

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

State: Published
Severity: 9.1 Critical
Published: May 6, 2026
Updated: Oct 19, 2026
Reserved: May 1, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	9.1 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H	Linux

Weaknesses

CWE-476 NULL Pointer Dereference

Affected Products

Product	Versions
LinuxLinux	bc074524e123ded281cde25ebc5661910f9679e3 to before 4a7bab35fad5251c8cb738161152578cd83b6b9cAffected bc074524e123ded281cde25ebc5661910f9679e3 to before 520e8b4bcf872a534a7bf61ccf880047642df296Affected bc074524e123ded281cde25ebc5661910f9679e3 to before e252db8ca2a01f82d472091f35d549b313278636Affected bc074524e123ded281cde25ebc5661910f9679e3 to before c09a7446aab5773f38d6abb25fce99b8e1dfbc97Affected bc074524e123ded281cde25ebc5661910f9679e3 to before 32372781d664a9b03c40343e96c29d0a6139f97dAffected bc074524e123ded281cde25ebc5661910f9679e3 to before 2e4adfaec97ee053ad1bdfb5036845e66f7e0d8aAffected bc074524e123ded281cde25ebc5661910f9679e3 to before d110d7cdb045715c0b45b0dfd974525bb38f653dAffected bc074524e123ded281cde25ebc5661910f9679e3 to before a85b46db143fda5869e7d8df8f258ccef5fa1719Affected
LinuxLinux	4.8Affected before 4.8Not affected 5.10.258 through 5.10.Not affected 5.15.209 through 5.15.Not affected 6.1.175 through 6.1.Not affected 6.6.136 through 6.6.Not affected 6.12.83 through 6.12.Not affected 6.18.24 through 6.18.Not affected 6.19.14 through 6.19.*Not affected 7.0 and laterNot affected

Product

Versions

LinuxLinux

bc074524e123ded281cde25ebc5661910f9679e3 to before 4a7bab35fad5251c8cb738161152578cd83b6b9cAffected
bc074524e123ded281cde25ebc5661910f9679e3 to before 520e8b4bcf872a534a7bf61ccf880047642df296Affected
bc074524e123ded281cde25ebc5661910f9679e3 to before e252db8ca2a01f82d472091f35d549b313278636Affected
bc074524e123ded281cde25ebc5661910f9679e3 to before c09a7446aab5773f38d6abb25fce99b8e1dfbc97Affected
bc074524e123ded281cde25ebc5661910f9679e3 to before 32372781d664a9b03c40343e96c29d0a6139f97dAffected
bc074524e123ded281cde25ebc5661910f9679e3 to before 2e4adfaec97ee053ad1bdfb5036845e66f7e0d8aAffected
bc074524e123ded281cde25ebc5661910f9679e3 to before d110d7cdb045715c0b45b0dfd974525bb38f653dAffected
bc074524e123ded281cde25ebc5661910f9679e3 to before a85b46db143fda5869e7d8df8f258ccef5fa1719Affected

LinuxLinux

4.8Affected
before 4.8Not affected
5.10.258 through 5.10.*Not affected
5.15.209 through 5.15.*Not affected
6.1.175 through 6.1.*Not affected
6.6.136 through 6.6.*Not affected
6.12.83 through 6.12.*Not affected
6.18.24 through 6.18.*Not affected
6.19.14 through 6.19.*Not affected
7.0 and laterNot affected

References

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