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CVE-2026-63843

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/jpeg: set no_user_fence for JPEG v4.0.5 ring JPEG rings do not support 64-bit user fence writes, reject CS submissio…

Published Jul 19, 2026linuxCWE-754EPSS 0.18%

Overview

CVE-2026-63843 is a high-severity vulnerability affecting linux linux_kernel. It was published on July 19, 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/amdgpu/jpeg: set no_user_fence for JPEG v4.0.5 ring

JPEG rings do not support 64-bit user fence writes, reject CS

submissions with user fences.

(cherry picked from commit f05d0a4f21fc720116d6e238f23308b199891058)

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. 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.

Affected products

VendorProductVersionsStatus
linuxlinux_kernel>= 6.7, < 6.12.91Affected

References

Refgit.kernel.org/stable/c/424510b60d4698a75a6ff71acdd88b528f0f39afRefgit.kernel.org/stable/c/b65b7f3f3c18f797f81a2af7c97e2079900ad6dbRefgit.kernel.org/stable/c/f26e3f7186cd6ecc93e6af102744d64c798dea7eRefgit.kernel.org/stable/c/f9bc5633b761cff200c428f61ed0df6212b1c721

How CyberStrike helps

Frequently asked questions

What is CVE-2026-63843?

CVE-2026-63843 is a high-severity vulnerability affecting linux linux_kernel. It was published on July 19, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-63843?

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-2026-63843?

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. 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-2026-63843?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-63843 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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