CVE-2026-99007
kernel: drm/fb-helper: defer setup when fbdev_probe() fails, not just on -EAGAIN
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 23, 2026
Updated · October 29, 2026
Description
A flaw was found in the Linux kernel's Direct Rendering Manager (DRM) framebuffer helper. A local user could trigger a Denial of Service (DoS) due to improper error handling during framebuffer device probing. When initialization fails unexpectedly, the kernel fails to mark the setup as deferred, leaving display configurations in an incomplete state. A subsequent display restore operation may commit this invalid state, resulting in a kernel crash or system instability.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 4.7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-617 · Reachable Assertion