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CVE-2024-26940

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: Create debugfs ttm_resource_manager entry only if needed The driver creates /sys/kernel/debug/dri/0/mob_ttm even wh…

Published May 1, 2024EPSS 0.23%

Overview

CVE-2024-26940 is a medium-severity vulnerability. It was published on May 1, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. 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/vmwgfx: Create debugfs ttm_resource_manager entry only if needed

The driver creates /sys/kernel/debug/dri/0/mob_ttm even when the

corresponding ttm_resource_manager is not allocated.

This leads to a crash when trying to read from this file.

Add a check to create mob_ttm, system_mob_ttm, and gmr_ttm debug file

only when the corresponding ttm_resource_manager is allocated.

crash> bt

PID: 3133409 TASK: ffff8fe4834a5000 CPU: 3 COMMAND: "grep"

#0 [ffffb954506b3b20] machine_kexec at ffffffffb2a6bec3

#1 [ffffb954506b3b78] __crash_kexec at ffffffffb2bb598a

#2 [ffffb954506b3c38] crash_kexec at ffffffffb2bb68c1

#3 [ffffb954506b3c50] oops_end at ffffffffb2a2a9b1

#4 [ffffb954506b3c70] no_context at ffffffffb2a7e913

#5 [ffffb954506b3cc8] __bad_area_nosemaphore at ffffffffb2a7ec8c

#6 [ffffb954506b3d10] do_page_fault at ffffffffb2a7f887

#7 [ffffb954506b3d40] page_fault at ffffffffb360116e

[exception RIP: ttm_

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/016119154981d81c9e8f2ea3f56b9e2b4ea14500Refgit.kernel.org/stable/c/042ef0afc40fa1a22b3608f22915b91ce39d128fRefgit.kernel.org/stable/c/25e3ce59c1200f1f0563e39de151f34962ab0fe1Refgit.kernel.org/stable/c/4be9075fec0a639384ed19975634b662bfab938fRefgit.kernel.org/stable/c/eb08db0fc5354fa17b7ed66dab3c503332423451Refgit.kernel.org/stable/c/016119154981d81c9e8f2ea3f56b9e2b4ea14500Refgit.kernel.org/stable/c/042ef0afc40fa1a22b3608f22915b91ce39d128fRefgit.kernel.org/stable/c/25e3ce59c1200f1f0563e39de151f34962ab0fe1Refgit.kernel.org/stable/c/4be9075fec0a639384ed19975634b662bfab938fRefgit.kernel.org/stable/c/eb08db0fc5354fa17b7ed66dab3c503332423451

How CyberStrike helps

Frequently asked questions

What is CVE-2024-26940?

CVE-2024-26940 is a medium-severity vulnerability. It was published on May 1, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-26940?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-26940?

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-2024-26940?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-26940 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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