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CVE-2026-53374

8.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: zero-initialize GART table on allocation GART TLB is flushed after unmapping but not after mapping.

Published Jul 19, 2026EPSS 0.13%

Overview

CVE-2026-53374 is a high-severity vulnerability. It was published on July 19, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

drm/amdgpu: zero-initialize GART table on allocation

GART TLB is flushed after unmapping but not after mapping. Since

amdgpu_bo_create_kernel() does not zero-initialize the buffer, when a

single PTE is written the TLB may speculatively load other uninitialized

entries from the same cacheline. Those garbage entries can appear valid,

and a subsequent write to another PTE in the same cacheline may cause the

GPU to use a stale garbage PTE from the TLB.

Fix this by calling memset_io() to zero-initialize the GART table with

gart_pte_flags immediately after allocation.

Using AMDGPU_GEM_CREATE_VRAM_CLEARED, SDMA-based clear will not work

since SDMA needs GART to be initialized to work.

(cherry picked from commit d9af8263b82b6eaa60c5718e0c6631c5037e4b24)

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/40df11255d71b02e20e70579f1b12b687e396e26Refgit.kernel.org/stable/c/791941be5da125d9a1b228582bfdc300c05d05b3Refgit.kernel.org/stable/c/8ae8b9e74bab94aab1d79f1688129bcc61c8b29aRefgit.kernel.org/stable/c/91fbb5e635c8fb1b49e15c19da06480089ef719fRefgit.kernel.org/stable/c/b17175d0a375b3ed5e81597dac4983fdb46e478dRefgit.kernel.org/stable/c/e6c2e6c2e1fa066968a16aca1cb66cd1bdde7741

How CyberStrike helps

Frequently asked questions

What is CVE-2026-53374?

CVE-2026-53374 is a high-severity vulnerability. It was published on July 19, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-53374?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-53374?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-53374?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-53374 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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