Deadlock in Linux kernel - CVE-2026-98094
Published: September 28, 2026
Vulnerability identifier: #VU152357
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-2026-98094
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 an IRQ-unsafe locking mechanism in the fbtft dirty_lock handling in fbtft_mkdirty() and fbtft_deferred_io() when framebuffer console rendering occurs in hardirq context concurrently with deferred I/O workqueue processing. A local user can trigger concurrent framebuffer console rendering and deferred I/O processing to cause a denial of service.
Affected software
Linux kernel
How to mitigate CVE-2026-98094
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3