Use-after-free in Linux kernel - CVE-2026-90404
Published: September 18, 2026
Vulnerability identifier: #VU151068
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90404
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 cros_ec_debugfs remove path when an EC panic notification is delivered after the device instance has been removed. A local user can trigger an EC panic notification after device removal to cause a denial of service.
The callback can queue work that accesses released data.
Affected software
Linux kernel
How to mitigate CVE-2026-90404
Install security update from vendor's repository.
External References
- https://git.kernel.org/stable/c/05c1081ae4503e45b934b390350f942db3208892
- https://git.kernel.org/stable/c/56989e2a9c292ff7689603feed41d030301ca636
- https://git.kernel.org/stable/c/a5d3128b06ccfc398c2e456fddebadce52310bd8
- https://git.kernel.org/stable/c/e2cbe14361d7cb0b5abd66d87f3afa0e16efde9f
- https://git.kernel.org/stable/c/e5954d3031fb55dd31aa59bae477d63c68e941c0