CVE-2024-40944: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: x86/kexec: Fix bug with call depth tracking The call to cc_platform_has() triggers a fault and system crash if call depth tracking is active because the GS segment has been reset by load_segments() and GS_BASE is now 0 but call depth tracking uses per-CPU variables to operate. Call cc_platform_has() earlier in the function when GS is still valid. [ bp: Massage. ]

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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	6.2 — 6.6.35
linux	linux_kernel	6.7 — 6.9.6
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/2cfb464669b645a9b98478b74f2bcea9860dcff1 https://git.kernel.org/stable/c/93c1800b3799f17375989b0daf76497dd3e80922 https://git.kernel.org/stable/c/d91ddd05082691e69b30744825d18ae799293258 https://git.kernel.org/stable/c/2cfb464669b645a9b98478b74f2bcea9860dcff1 https://git.kernel.org/stable/c/93c1800b3799f17375989b0daf76497dd3e80922 https://git.kernel.org/stable/c/d91ddd05082691e69b30744825d18ae799293258

Frequently Asked Questions

What is CVE-2024-40944? +

In the Linux kernel, the following vulnerability has been resolved: x86/kexec: Fix bug with call depth tracking The call to cc_platform_has() triggers a fault and system crash if call depth tracking is active because the GS segment has been reset by load_segments() and GS_BASE is now 0 but call depth tracking uses per-CPU variables to operate. Call cc_platform_has() earlier in the function when GS is still valid. [ bp: Massage. ] It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-40944? +

CVE-2024-40944 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-2024-40944? +

CVE-2024-40944 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-2024-40944? +

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-2024-40944