Use-after-free in Linux kernel - CVE-2026-98309
Published: October 7, 2026
Vulnerability identifier: #VU153710
CSH Severity: Low
CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98309
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local privileged user to cause a denial of service.
The vulnerability exists due to use-after-free in the vc4 driver's KMS output polling when the driver is unbound and scheduled polling work accesses a freed drm_device. A local privileged user can unload the vc4 driver while output polling remains scheduled to cause a denial of service.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-98309
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.113-1
linux (Debian package) - update to 6.12.113-1
External References
- https://git.kernel.org/stable/c/073a30d75f309812ed61af134f24ffef4107b13a
- https://git.kernel.org/stable/c/7f9780df677370a19b4ec9764f13b1b82073e0d9
- https://git.kernel.org/stable/c/b6beee927e7f4e3142032ff91b2d0417cdddc0f6
- https://git.kernel.org/stable/c/cf0c4432bda37b02e7d430ff5017228ceb7caf0c
- https://git.kernel.org/stable/c/ee507691c18f9fee5d4751e295ab9a7ff31d59ae