Improper locking in Linux kernel - CVE-2026-89598
Published: September 12, 2026
Vulnerability identifier: #VU149207
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-2026-89598
CWE-ID: CWE-667
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 locking in the ssd1307fb framebuffer driver when processing framebuffer damage callbacks while preemption is disabled. A local user can trigger a display update to cause a denial of service.
The issue affects SSD1307 framebuffer devices that use I2C transfers.
Affected software
Linux kernel
How to mitigate CVE-2026-89598
Install security update from vendor's repository.