Deadlock in Linux kernel - CVE-2026-93269
Published: September 25, 2026
Vulnerability identifier: #VU152137
CSH Severity: Low
CVSS v4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-93269
CWE-ID: CWE-833
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper lock ordering in ext4_ext_migrate when invoking the ext4 extent migration ioctl. A local user can trigger concurrent inode eviction and writeback operations to cause a denial of service.
Affected software
Linux kernel
How to mitigate CVE-2026-93269
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/32f7ab52875ec7f800ca67e7176e5743a84baddf
- https://git.kernel.org/stable/c/452950461241dfed8b1d32e94b227db38c99c5af
- https://git.kernel.org/stable/c/a897682793eba5de51ee6f3152760374afa629cf
- https://git.kernel.org/stable/c/ada23457d4748d6e9c36c6f871fc29a6f558c48c
- https://git.kernel.org/stable/c/e4223231b6860141813637a6413c2371ae4d6fa8