Vulnerability-Lookup

GHSA-J994-F74J-CWF3

Vulnerability from github – Published: 2024-10-21 18:30 – Updated: 2024-10-24 21:31

Details

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

drm/xe: fix UAF around queue destruction

We currently do stuff like queuing the final destruction step on a random system wq, which will outlive the driver instance. With bad timing we can teardown the driver with one or more work workqueue still being alive leading to various UAF splats. Add a fini step to ensure user queues are properly torn down. At this point GuC should already be nuked so queue itself should no longer be referenced from hw pov.

v2 (Matt B) - Looks much safer to use a waitqueue and then just wait for the xa_array to become empty before triggering the drain.

(cherry picked from commit 861108666cc0e999cffeab6aff17b662e68774e3)

Severity ?

7.8 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2024-49876"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-10-21T18:15:09Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe: fix UAF around queue destruction\n\nWe currently do stuff like queuing the final destruction step on a\nrandom system wq, which will outlive the driver instance. With bad\ntiming we can teardown the driver with one or more work workqueue still\nbeing alive leading to various UAF splats. Add a fini step to ensure\nuser queues are properly torn down. At this point GuC should already be\nnuked so queue itself should no longer be referenced from hw pov.\n\nv2 (Matt B)\n - Looks much safer to use a waitqueue and then just wait for the\n   xa_array to become empty before triggering the drain.\n\n(cherry picked from commit 861108666cc0e999cffeab6aff17b662e68774e3)",
  "id": "GHSA-j994-f74j-cwf3",
  "modified": "2024-10-24T21:31:02Z",
  "published": "2024-10-21T18:30:56Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-49876"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/272b0e78874586d6ccae04079d75b27b47705544"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2d2be279f1ca9e7288282d4214f16eea8a727cdb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/421c74670b0f9d5c007f1276d3647aa58f407fde"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2024-49876 (GCVE-0-2024-49876)

Vulnerability from cvelistv5 – Published: 2024-10-21 18:01 – Updated: 2025-05-04 09:40

Title

drm/xe: fix UAF around queue destruction

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/xe: fix UAF around queue destruction We currently do stuff like queuing the final destruction step on a random system wq, which will outlive the driver instance. With bad timing we can teardown the driver with one or more work workqueue still being alive leading to various UAF splats. Add a fini step to ensure user queues are properly torn down. At this point GuC should already be nuked so queue itself should no longer be referenced from hw pov. v2 (Matt B) - Looks much safer to use a waitqueue and then just wait for the xa_array to become empty before triggering the drain. (cherry picked from commit 861108666cc0e999cffeab6aff17b662e68774e3)

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/272b0e78874586d6c…
	https://git.kernel.org/stable/c/421c74670b0f9d5c0…
	https://git.kernel.org/stable/c/2d2be279f1ca9e728…

Impacted products

Vendor

Product

Version

Linux

Affected: dd08ebf6c3525a7ea2186e636df064ea47281987 , < 272b0e78874586d6ccae04079d75b27b47705544 (git)
Affected: dd08ebf6c3525a7ea2186e636df064ea47281987 , < 421c74670b0f9d5c007f1276d3647aa58f407fde (git)
Affected: dd08ebf6c3525a7ea2186e636df064ea47281987 , < 2d2be279f1ca9e7288282d4214f16eea8a727cdb (git)

Linux

Affected: 6.8
Unaffected: 0 , < 6.8 (semver)
Unaffected: 6.10.14 , ≤ 6.10.* (semver)
Unaffected: 6.11.3 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)

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        "metrics": [
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                "id": "CVE-2024-49876",
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                  },
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                  }
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                "role": "CISA Coordinator",
                "timestamp": "2024-10-22T13:46:17.394123Z",
                "version": "2.0.3"
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        "providerMetadata": {
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    "dateReserved": "2024-10-21T12:17:06.020Z",
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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-J994-F74J-CWF3

CVE-2024-49876 (GCVE-0-2024-49876)

Tags

Sightings

Nomenclature