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CVE-2026-68257

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: fix 32-bit overflow in CWSR total size calculation total_cwsr_size was computed in 32-bit before being used as a BO…

Published Aug 10, 2026EPSS 0.14%

Overview

CVE-2026-68257 is a high-severity vulnerability. It was published on August 10, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, 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/amdkfd: fix 32-bit overflow in CWSR total size calculation

total_cwsr_size was computed in 32-bit before being used as a BO/SVM

allocation size.

With large ctx_save_restore_area_size and debug_memory_size

multiplied by the XCC count, the product can wrap,

yielding an undersized CWSR save area that firmware later overruns.

Promote total_cwsr_size to u64 and use check_add_overflow()/

check_mul_overflow() in both kfd_queue_acquire_buffers() and

kfd_queue_release_buffers().

(cherry picked from commit 319f7e13423ae3f486b9aea82f9ad2d6af0ee608)

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/2b0386d4293920e690c0e017708f999b93cc729bRefgit.kernel.org/stable/c/865532d54eb57b660b1cb1b0e1755776ce21b849Refgit.kernel.org/stable/c/abce3276c57e36c955627307469b9f009057a467Refgit.kernel.org/stable/c/b88ffe6593607364a8c06a48c6f29e55437cdf8e

How CyberStrike helps

Frequently asked questions

What is CVE-2026-68257?

CVE-2026-68257 is a high-severity vulnerability. It was published on August 10, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-68257?

This vulnerability has a CVSS 3.1 base score of 7.8, 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-2026-68257?

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-2026-68257?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-68257 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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