Critical severity · published May 6, 2026
CVE-2026-43117
btrfs: tracepoints: get correct superblock from dentry in event btrfs_sync_file()
9.1
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 40% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
4.8 before 6.6.136; 6.7 before 6.12.83; 6.13 before 6.18.24; 6.19 before 6.19.14; 7.0; 7.0; +3 more · source: NVD
LI
Linux · Linux
bc074524e123ded281cde25ebc5661910f9679e3 before 4a7bab35fad5251c8cb738161152578cd83b6b9c; bc074524e123ded281cde25ebc5661910f9679e3 before 520e8b4bcf872a534a7bf61ccf880047642df296; bc074524e123ded281cde25ebc5661910f9679e3 before e252db8ca2a01f82d472091f35d549b313278636; bc074524e123ded281cde25ebc5661910f9679e3 before c09a7446aab5773f38d6abb25fce99b8e1dfbc97; bc074524e123ded281cde25ebc5661910f9679e3 before 32372781d664a9b03c40343e96c29d0a6139f97d; bc074524e123ded281cde25ebc5661910f9679e3 before 2e4adfaec97ee053ad1bdfb5036845e66f7e0d8a; +3 more · source: vendor
SS
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem · Siemens
0 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-43117
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-43117
Patch
https://git.kernel.org/stable/c/2e4adfaec97ee053ad1bdfb5036845e66f7e0d8a
Patch
https://git.kernel.org/stable/c/32372781d664a9b03c40343e96c29d0a6139f97d
git.kernel.org
https://git.kernel.org/stable/c/4a7bab35fad5251c8cb738161152578cd83b6b9c
git.kernel.org
https://git.kernel.org/stable/c/520e8b4bcf872a534a7bf61ccf880047642df296
Patch
https://git.kernel.org/stable/c/a85b46db143fda5869e7d8df8f258ccef5fa1719
Patch
https://git.kernel.org/stable/c/c09a7446aab5773f38d6abb25fce99b8e1dfbc97
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