CVE-2024-40924: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: drm/i915/dpt: Make DPT object unshrinkable In some scenarios, the DPT object gets shrunk but the actual framebuffer did not and thus its still there on the DPT's vm->bound_list. Then it tries to rewrite the PTEs via a stale CPU mapping. This causes panic. [vsyrjala: Add TODO comment] (cherry picked from commit 51064d471c53dcc8eddd2333c3f1c1d9131ba36c)

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Products

Vendor	Product	Versions
linux	linux_kernel	6.0 — 6.1.95
linux	linux_kernel	6.2 — 6.6.35
linux	linux_kernel	6.7 — 6.9.6
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/327280149066f0e5f2e50356b5823f76dabfe86e https://git.kernel.org/stable/c/43e2b37e2ab660c3565d4cff27922bc70e79c3f1 https://git.kernel.org/stable/c/7a9883be3b98673333eec65c4a21cc18e60292eb https://git.kernel.org/stable/c/a2552020fb714ff357182c3c179abfac2289f84d https://git.kernel.org/stable/c/327280149066f0e5f2e50356b5823f76dabfe86e https://git.kernel.org/stable/c/43e2b37e2ab660c3565d4cff27922bc70e79c3f1 https://git.kernel.org/stable/c/7a9883be3b98673333eec65c4a21cc18e60292eb https://git.kernel.org/stable/c/a2552020fb714ff357182c3c179abfac2289f84d

Other References

https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Frequently Asked Questions

What is CVE-2024-40924? +

In the Linux kernel, the following vulnerability has been resolved: drm/i915/dpt: Make DPT object unshrinkable In some scenarios, the DPT object gets shrunk but the actual framebuffer did not and thus its still there on the DPT's vm->bound_list. Then it tries to rewrite the PTEs via a stale CPU mapping. This causes panic. [vsyrjala: Add TODO comment] (cherry picked from commit 51064d471c53dcc8eddd2333c3f1c1d9131ba36c) It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-40924? +

CVE-2024-40924 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-40924? +

CVE-2024-40924 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-40924? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2024-40924