CVE-2026-89803 drm/nouveau: unsubscribe the channel-kill event before the fence context

In the Linux kernel, the following vulnerability has been resolved: drm/nouveau: unsubscribe the channel-kill event before the fence context nouveauchanneldel tears the fence context down first and only drops the channel-kill subscription later, in the middle of the nvif object teardown: if...

CVE-2026-89803

CVE-2026-89803 is a use-after-free in the Linux kernel's DRM/Nouveau driver. In nouveau_channel_del(), the fence context is destroyed before the channel-kill event subscription is dropped, leaving a narrow window where a kill event handler can dereference an already-freed fence context. The bug i...

CVE-2026-89803 drm/nouveau: unsubscribe the channel-kill event before the fence context

In the Linux kernel, the following vulnerability has been resolved: drm/nouveau: unsubscribe the channel-kill event before the fence context nouveauchanneldel tears the fence context down first and only drops the channel-kill subscription later, in the middle of the nvif object teardown: if...