Vulnerability-Lookup

GHSA-22GP-7W9X-C2XX

Vulnerability from github – Published: 2024-05-20 12:30 – Updated: 2025-09-23 18:30

Details

In the Linux kernel, the following vulnerability has been resolved:

drm/ast: Fix soft lockup

There is a while-loop in ast_dp_set_on_off() that could lead to infinite-loop. This is because the register, VGACRI-Dx, checked in this API is a scratch register actually controlled by a MCU, named DPMCU, in BMC.

These scratch registers are protected by scu-lock. If suc-lock is not off, DPMCU can not update these registers and then host will have soft lockup due to never updated status.

DPMCU is used to control DP and relative registers to handshake with host's VGA driver. Even the most time-consuming task, DP's link training, is less than 100ms. 200ms should be enough.

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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{
  "affected": [],
  "aliases": [
    "CVE-2024-35952"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-667"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-20T10:15:10Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/ast: Fix soft lockup\n\nThere is a while-loop in ast_dp_set_on_off() that could lead to\ninfinite-loop. This is because the register, VGACRI-Dx, checked in\nthis API is a scratch register actually controlled by a MCU, named\nDPMCU, in BMC.\n\nThese scratch registers are protected by scu-lock. If suc-lock is not\noff, DPMCU can not update these registers and then host will have soft\nlockup due to never updated status.\n\nDPMCU is used to control DP and relative registers to handshake with\nhost\u0027s VGA driver. Even the most time-consuming task, DP\u0027s link\ntraining, is less than 100ms. 200ms should be enough.",
  "id": "GHSA-22gp-7w9x-c2xx",
  "modified": "2025-09-23T18:30:19Z",
  "published": "2024-05-20T12:30:27Z",
  "references": [
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      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-35952"
    },
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    },
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  "severity": [
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      "type": "CVSS_V3"
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}

CVE-2024-35952 (GCVE-0-2024-35952)

Vulnerability from cvelistv5 – Published: 2024-05-20 09:41 – Updated: 2025-05-04 09:09

Title

drm/ast: Fix soft lockup

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/ast: Fix soft lockup There is a while-loop in ast_dp_set_on_off() that could lead to infinite-loop. This is because the register, VGACRI-Dx, checked in this API is a scratch register actually controlled by a MCU, named DPMCU, in BMC. These scratch registers are protected by scu-lock. If suc-lock is not off, DPMCU can not update these registers and then host will have soft lockup due to never updated status. DPMCU is used to control DP and relative registers to handshake with host's VGA driver. Even the most time-consuming task, DP's link training, is less than 100ms. 200ms should be enough.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/8a6fea3fcb577a543…
	https://git.kernel.org/stable/c/a81b2acd43e24e419…
	https://git.kernel.org/stable/c/35768baf0fdfc47ed…
	https://git.kernel.org/stable/c/bc004f5038220b189…

Impacted products

Vendor

Product

Version

Linux

Affected: 594e9c04b5864b4b8b151ef4ba9521c59e0f5c54 , < 8a6fea3fcb577a543ef67683ca7105bde49a38fb (git)
Affected: 594e9c04b5864b4b8b151ef4ba9521c59e0f5c54 , < a81b2acd43e24e419f65df97348c76a5a1496066 (git)
Affected: 594e9c04b5864b4b8b151ef4ba9521c59e0f5c54 , < 35768baf0fdfc47ede42d899506bad78450e9294 (git)
Affected: 594e9c04b5864b4b8b151ef4ba9521c59e0f5c54 , < bc004f5038220b1891ef4107134ccae44be55109 (git)

Linux

Affected: 5.19
Unaffected: 0 , < 5.19 (semver)
Unaffected: 6.1.87 , ≤ 6.1.* (semver)
Unaffected: 6.6.28 , ≤ 6.6.* (semver)
Unaffected: 6.8.7 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)

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Sightings

Author	Source	Type	Date

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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-22GP-7W9X-C2XX

CVE-2024-35952 (GCVE-0-2024-35952)

Tags

Sightings

Nomenclature