Vulnerability-Lookup

GHSA-4X56-GM9R-89MG

Vulnerability from github – Published: 2024-07-12 15:31 – Updated: 2025-10-06 21:30

Details

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. ]

Severity

5.5 (Medium)


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

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  "aliases": [
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  "id": "GHSA-4x56-gm9r-89mg",
  "modified": "2025-10-06T21:30:27Z",
  "published": "2024-07-12T15:31:28Z",
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CVE-2024-40944 (GCVE-0-2024-40944)

Vulnerability from cvelistv5 – Published: 2024-07-12 12:25 – Updated: 2026-05-11 20:22

Title

x86/kexec: Fix bug with call depth tracking

Summary

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. ]

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-10 17:04 UTC

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7033 records in the last 180 days details

References

3 references

URL	Tags
https://git.kernel.org/stable/c/d91ddd05082691e69…
https://git.kernel.org/stable/c/2cfb464669b645a9b…
https://git.kernel.org/stable/c/93c1800b3799f1737…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 5d8213864ade86b48fc492584ea86d65a62f892e , < d91ddd05082691e69b30744825d18ae799293258 (git) Affected: 5d8213864ade86b48fc492584ea86d65a62f892e , < 2cfb464669b645a9b98478b74f2bcea9860dcff1 (git) Affected: 5d8213864ade86b48fc492584ea86d65a62f892e , < 93c1800b3799f17375989b0daf76497dd3e80922 (git)
Linux	Linux	Affected: 6.2 Unaffected: 0 , < 6.2 (semver) Unaffected: 6.6.35 , ≤ 6.6.* (semver) Unaffected: 6.9.6 , ≤ 6.9.* (semver) Unaffected: 6.10 , ≤ * (original_commit_for_fix)

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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