CVE-2020-36788: drm/nouveau: avoid a use-after-free when BO init fails

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-05-21 · updated 2026-08-04
Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: drm/nouveau: avoid a use-after-free when BO init fails nouveau_bo_init() is backed by ttm_bo_init() and ferries its return code back to the caller. On failures, ttm_bo_init() invokes the provided destructor which should de-initialize and free the memory. Thus, when nouveau_bo_init() returns an error the gem object has already been released and the memory freed by nouveau_bo_del_ttm().

Affected products

Linux kernel: from 5.4 before 5.10.73; from 5.11 before 5.14.12; 5.15-rc1, 5.15-rc2, 5.15-rc3, 5.15-rc4 — fixed in 5.10.73, 5.14.12

How to fix

Upgrade to a fixed version: Linux kernel 5.10.73, 5.14.12. Check the vendor advisory for mitigations.

References

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