CVE-2026-98270 drm/amdgpu: check ras and obj before dereference
A null pointer dereference in the AMD GPU driver causes a kernel crash during specific interrupt handling, leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-98270?
CVE-2026-98270 is a vulnerability in Linux, published on 6 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
drm/amdgpu: check ras and obj before dereference
nbio_v7_9_handle_ras_controller_intr_no_bifring() dereferences ras and obj without checking either for NULL. Both amdgpu_ras_get_context() and amdgpu_ras_find_obj() can return NULL, e.g. during the window between adev->nbio.ras being set (early in amdgpu_ras_init(), by design, to enable the fatal-error interrupt as soon as possible) and the PCIE_BIF ras object actually being created in RAS late_init. Any interrupt in that window crashes in hard-IRQ context.
This is analogous to commit d190b459b2a4 ("drm/amdgpu: the warning dereferencing obj for nbio_v7_4"), which fixed the same issue in the nbio_v7_4 handler.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
(cherry picked from commit c7071767a50a32ed727cf800ac84372429e3b4b3)
Which versions are affected by CVE-2026-98270?
How do I fix CVE-2026-98270?
Apply the vendor's patch.
Is CVE-2026-98270 being exploited?
There is no known exploitation of CVE-2026-98270 in the wild and no public exploit code.
Sources
Also known as AZL-106413, BELL-CVE-2026-98270, DEBIAN-CVE-2026-98270, GHSA-q944-85cm-w3r6, UBUNTU-CVE-2026-98270.