Cyber Resilience

CVE-2026-43117

CriticalUpdated

Published: 06 May 2026

Published
06 May 2026
Modified
01 June 2026
KEV Added
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Patch
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CVSS Score v3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
EPSS Score 0.0040 31.8th percentile
Risk Priority 70 floored blend · peak EPSS

Summary

CVE-2026-43117 is a critical-severity an unspecified weakness vulnerability in Linux Linux Kernel. Its CVSS base score is 9.1 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Application or System Exploitation (T1499.004); ranked at the 31.8th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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…

more

a crash. Use file_inode(file)->i_sb to always get btrfs_sb.

CWE(s)
NVD-CWE-noinfo

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1499.004 Application or System Exploitation Impact
Adversaries may exploit software vulnerabilities that can cause an application or system to crash and deny availability to users.
attack.mitre.org →
Why these techniques?

Kernel null/wrong-pointer dereference in btrfs tracepoint triggers system crash under overlayfs, directly enabling local DoS via application/system exploitation.

Confidence: MEDIUM · MITRE ATT&CK Enterprise v19.0

Affected Assets

linux
linux kernel
7.0 · 4.8 — 6.6.136 · 6.7 — 6.12.83 · 6.13 — 6.18.24

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References