github - ghsa-q5gc-8mmj-m6hh

GHSA-Q5GC-8MMJ-M6HH

Vulnerability from github – Published: 2025-09-05 18:31 – Updated: 2025-11-24 21:30

Details

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

drm/xe: Make dma-fences compliant with the safe access rules

Xe can free some of the data pointed to by the dma-fences it exports. Most notably the timeline name can get freed if userspace closes the associated submit queue. At the same time the fence could have been exported to a third party (for example a sync_fence fd) which will then cause an use- after-free on subsequent access.

To make this safe we need to make the driver compliant with the newly documented dma-fence rules. Driver has to ensure a RCU grace period between signalling a fence and freeing any data pointed to by said fence.

For the timeline name we simply make the queue be freed via kfree_rcu and for the shared lock associated with multiple queues we add a RCU grace period before freeing the per GT structure holding the lock.

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-2025-38703"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-04T16:15:39Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe: Make dma-fences compliant with the safe access rules\n\nXe can free some of the data pointed to by the dma-fences it exports. Most\nnotably the timeline name can get freed if userspace closes the associated\nsubmit queue. At the same time the fence could have been exported to a\nthird party (for example a sync_fence fd) which will then cause an use-\nafter-free on subsequent access.\n\nTo make this safe we need to make the driver compliant with the newly\ndocumented dma-fence rules. Driver has to ensure a RCU grace period\nbetween signalling a fence and freeing any data pointed to by said fence.\n\nFor the timeline name we simply make the queue be freed via kfree_rcu and\nfor the shared lock associated with multiple queues we add a RCU grace\nperiod before freeing the per GT structure holding the lock.",
  "id": "GHSA-q5gc-8mmj-m6hh",
  "modified": "2025-11-24T21:30:56Z",
  "published": "2025-09-05T18:31:16Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38703"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/683b0e397dad9f26a42dcacf6f7f545a77ce6c06"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6bd90e700b4285e6a7541e00f969cab0d696adde"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b17fcce70733c211cb5dabf54f4f9491920b1d92"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ba37807d08bae67de6139346a85650cab5f6145a"
    }
  ],
  "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-2025-38703 (GCVE-0-2025-38703)

Vulnerability from cvelistv5 – Published: 2025-09-04 15:32 – Updated: 2025-09-29 10:47

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/xe: Make dma-fences compliant with the safe access rules Xe can free some of the data pointed to by the dma-fences it exports. Most notably the timeline name can get freed if userspace closes the associated submit queue. At the same time the fence could have been exported to a third party (for example a sync_fence fd) which will then cause an use- after-free on subsequent access. To make this safe we need to make the driver compliant with the newly documented dma-fence rules. Driver has to ensure a RCU grace period between signalling a fence and freeing any data pointed to by said fence. For the timeline name we simply make the queue be freed via kfree_rcu and for the shared lock associated with multiple queues we add a RCU grace period before freeing the per GT structure holding the lock.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/b17fcce70733c211c…
	https://git.kernel.org/stable/c/ba37807d08bae67de…
	https://git.kernel.org/stable/c/683b0e397dad9f26a…
	https://git.kernel.org/stable/c/6bd90e700b4285e6a…

Impacted products

Vendor

Product

Version

Linux

Affected: dd08ebf6c3525a7ea2186e636df064ea47281987 , < b17fcce70733c211cb5dabf54f4f9491920b1d92 (git)
Affected: dd08ebf6c3525a7ea2186e636df064ea47281987 , < ba37807d08bae67de6139346a85650cab5f6145a (git)
Affected: dd08ebf6c3525a7ea2186e636df064ea47281987 , < 683b0e397dad9f26a42dcacf6f7f545a77ce6c06 (git)
Affected: dd08ebf6c3525a7ea2186e636df064ea47281987 , < 6bd90e700b4285e6a7541e00f969cab0d696adde (git)

Linux

Affected: 6.8
Unaffected: 0 , < 6.8 (semver)
Unaffected: 6.12.43 , ≤ 6.12.* (semver)
Unaffected: 6.15.11 , ≤ 6.15.* (semver)
Unaffected: 6.16.2 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)

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JSON

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{
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      "affected": [
        {
          "defaultStatus": "unaffected",
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          "programFiles": [
            "drivers/gpu/drm/xe/xe_guc_exec_queue_types.h",
            "drivers/gpu/drm/xe/xe_guc_submit.c",
            "drivers/gpu/drm/xe/xe_hw_fence.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b17fcce70733c211cb5dabf54f4f9491920b1d92",
              "status": "affected",
              "version": "dd08ebf6c3525a7ea2186e636df064ea47281987",
              "versionType": "git"
            },
            {
              "lessThan": "ba37807d08bae67de6139346a85650cab5f6145a",
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              "version": "dd08ebf6c3525a7ea2186e636df064ea47281987",
              "versionType": "git"
            },
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              "status": "affected",
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/xe/xe_guc_exec_queue_types.h",
            "drivers/gpu/drm/xe/xe_guc_submit.c",
            "drivers/gpu/drm/xe/xe_hw_fence.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.8"
            },
            {
              "lessThan": "6.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.43",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.15.*",
              "status": "unaffected",
              "version": "6.15.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.16.*",
              "status": "unaffected",
              "version": "6.16.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.17",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "6.8",
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        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-29T10:47:41.720Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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        {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38703",
    "datePublished": "2025-09-04T15:32:54.779Z",
    "dateReserved": "2025-04-16T04:51:24.032Z",
    "dateUpdated": "2025-09-29T10:47:41.720Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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-Q5GC-8MMJ-M6HH

CVE-2025-38703 (GCVE-0-2025-38703)

Tags

Sightings

Nomenclature