Use-after-free in Linux kernel - CVE-2026-93051
Published: September 19, 2026
Vulnerability identifier: #VU151438
CSH Severity: Low
CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-93051
CWE-ID: CWE-416
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 use-after-free in the Linux kernel ad525x_dpot driver's sysfs attribute handling when removing a device without removing its command sysfs attributes before freeing driver data. A local user can access command sysfs attributes that remain exposed after the driver data is freed to cause a denial of service.
The command sysfs attributes are exposed only for devices supporting the F_CMD_INC feature.
Affected software
Linux kernel
How to mitigate CVE-2026-93051
Install security update from vendor's repository.
External References
- https://git.kernel.org/stable/c/0394902df38279da7f880021b2cfc64577a60e42
- https://git.kernel.org/stable/c/1d43cef1d4ff258dee3020cc29f29fd6becfd8b9
- https://git.kernel.org/stable/c/aa3ace3f6c66811001ffa63a53fbb01ed8109312
- https://git.kernel.org/stable/c/ab2fe43041412d37f88eb368a99f63f98b31d8ea
- https://git.kernel.org/stable/c/c7ff7a70f405a3c6fde39ed00a36d9f4fecaf3ab
- https://git.kernel.org/stable/c/ddbd794e543e5f917d191f8259ce40b79c52d105
- https://git.kernel.org/stable/c/e30f2c23c8d5620f9679e3b6656a6eb7cb1fd38b
- https://git.kernel.org/stable/c/e3a8557e88eb26278eda60bf64f2ef33ce7de8bf