github - ghsa-r56q-rrpj-wqj3

GHSA-R56Q-RRPJ-WQJ3

Vulnerability from github – Published: 2024-10-09 15:32 – Updated: 2024-10-23 15:31

Details

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

drm/amd/display: Disable DMCUB timeout for DCN35

[Why] DMCUB can intermittently take longer than expected to process commands.

Old ASIC policy was to continue while logging a diagnostic error - which works fine for ASIC without IPS, but with IPS this could lead to a race condition where we attempt to access DCN state while it's inaccessible, leading to a system hang when the NIU port is not disabled or register accesses that timeout and the display configuration in an undefined state.

[How] We need to investigate why these accesses take longer than expected, but for now we should disable the timeout on DCN35 to avoid this race condition. Since the waits happen only at lower interrupt levels the risk of taking too long at higher IRQ and causing a system watchdog timeout are minimal.

Severity ?

4.7 (Medium)


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

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  "affected": [],
  "aliases": [
    "CVE-2024-46870"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-362"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-10-09T14:15:07Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Disable DMCUB timeout for DCN35\n\n[Why]\nDMCUB can intermittently take longer than expected to process commands.\n\nOld ASIC policy was to continue while logging a diagnostic error - which\nworks fine for ASIC without IPS, but with IPS this could lead to a race\ncondition where we attempt to access DCN state while it\u0027s inaccessible,\nleading to a system hang when the NIU port is not disabled or register\naccesses that timeout and the display configuration in an undefined\nstate.\n\n[How]\nWe need to investigate why these accesses take longer than expected, but\nfor now we should disable the timeout on DCN35 to avoid this race\ncondition. Since the waits happen only at lower interrupt levels the\nrisk of taking too long at higher IRQ and causing a system watchdog\ntimeout are minimal.",
  "id": "GHSA-r56q-rrpj-wqj3",
  "modified": "2024-10-23T15:31:03Z",
  "published": "2024-10-09T15:32:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-46870"
    },
    {
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      "url": "https://git.kernel.org/stable/c/31c254c9cd4b122a10db297124f867107a696d83"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7c70e60fbf4bff1123f0e8d5cb1ae71df6164d7f"
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  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2024-46870 (GCVE-0-2024-46870)

Vulnerability from cvelistv5 – Published: 2024-10-09 14:02 – Updated: 2025-07-11 17:20

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Disable DMCUB timeout for DCN35 [Why] DMCUB can intermittently take longer than expected to process commands. Old ASIC policy was to continue while logging a diagnostic error - which works fine for ASIC without IPS, but with IPS this could lead to a race condition where we attempt to access DCN state while it's inaccessible, leading to a system hang when the NIU port is not disabled or register accesses that timeout and the display configuration in an undefined state. [How] We need to investigate why these accesses take longer than expected, but for now we should disable the timeout on DCN35 to avoid this race condition. Since the waits happen only at lower interrupt levels the risk of taking too long at higher IRQ and causing a system watchdog timeout are minimal.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/31c254c9cd4b122a1…
	https://git.kernel.org/stable/c/7c70e60fbf4bff112…

Impacted products

Vendor

Product

Version

Linux

Affected: 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c , < 31c254c9cd4b122a10db297124f867107a696d83 (git)
Affected: 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c , < 7c70e60fbf4bff1123f0e8d5cb1ae71df6164d7f (git)

Linux

Affected: 4.15
Unaffected: 0 , < 4.15 (semver)
Unaffected: 6.10.9 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (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-R56Q-RRPJ-WQJ3

CVE-2024-46870 (GCVE-0-2024-46870)

Tags

Sightings

Nomenclature