CVE-2025-71083: drm/ttm: Avoid NULL pointer deref for evicted BOs

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-01-13 · updated 2026-10-19
Weakness: CWE-476

Description

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.

Affected products

Linux kernel: from 4.14.1 before 5.15.198; from 5.16 before 6.1.160; from 6.2 before 6.6.120; from 6.7 before 6.12.64; from 6.13 before 6.18.4; 4.14, 6.19-rc1, 6.19-rc2, 6.19-rc3, 6.19-rc4, 6.19-rc5 (+3) — fixed in 5.15.198, 6.1.160, 6.12.64, 6.18.4, 6.6.120

How to fix

Upgrade to a fixed version: Linux kernel 5.15.198, 6.1.160, 6.12.64, 6.18.4. Check the vendor advisory for mitigations.

References

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