Bug 2429107 (CVE-2025-71083)

Summary: CVE-2025-71083 kernel: Kernel: Denial of Service via NULL pointer dereference in drm/ttm
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in the Linux kernel. A local user could exploit a NULL pointer dereference vulnerability in the `drm/ttm` component. This occurs when a Buffer Object (BO) is evicted and `devcoredump` attempts to read its contents, potentially leading to a system crash and a Denial of Service (DoS).
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Description OSIDB Bzimport 2026-01-13 16:07:12 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drm/ttm: Avoid NULL pointer deref for evicted BOs

It is possible for a BO to exist that is not currently associated with a
resource, e.g. because it has been evicted.

When devcoredump tries to read the contents of all BOs for dumping, we need
to expect this as well -- in this case, ENODATA is recorded instead of the
buffer contents.
Comment 1 Jon Moroney 2026-01-14 22:52:49 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026011339-CVE-2025-71083-ddb3@gregkh/T