Vulnerability-Lookup

GHSA-HF5H-J5WG-PF5G

Vulnerability from github – Published: 2026-08-10 15:33 – Updated: 2026-08-14 00:31

Details

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

drm/xe/guc: Keep scheduler timeline name alive

The scheduler keeps a pointer to the timeline name, but q->name is freed with the exec queue while scheduler fences can still reference it.

Store the name in struct xe_guc_exec_queue so it shares the scheduler's RCU-deferred lifetime.

(cherry picked from commit 41075f0eb5dcbd3b065d15f15ef7bbe9315188e8)

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-2026-68383"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-10T13:20:31Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/guc: Keep scheduler timeline name alive\n\nThe scheduler keeps a pointer to the timeline name, but q-\u003ename\nis freed with the exec queue while scheduler fences can still\nreference it.\n\nStore the name in struct xe_guc_exec_queue so it shares\nthe scheduler\u0027s RCU-deferred lifetime.\n\n(cherry picked from commit 41075f0eb5dcbd3b065d15f15ef7bbe9315188e8)",
  "id": "GHSA-hf5h-j5wg-pf5g",
  "modified": "2026-08-14T00:31:56Z",
  "published": "2026-08-10T15:33:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68383"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/299bc6d50b1bed7d1f408391736712f01a0855e2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/77fd62412431e8c80ef2ad61466bc76fe425f80a"
    }
  ],
  "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-2026-68383 (GCVE-0-2026-68383)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:04 – Updated: 2026-08-17 05:04

Title

drm/xe/guc: Keep scheduler timeline name alive

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/xe/guc: Keep scheduler timeline name alive The scheduler keeps a pointer to the timeline name, but q->name is freed with the exec queue while scheduler fences can still reference it. Store the name in struct xe_guc_exec_queue so it shares the scheduler's RCU-deferred lifetime. (cherry picked from commit 41075f0eb5dcbd3b065d15f15ef7bbe9315188e8)

Severity

7.8 (High)


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

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/77fd62412431e8c80…
https://git.kernel.org/stable/c/299bc6d50b1bed7d1…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 6bd90e700b4285e6a7541e00f969cab0d696adde , < 77fd62412431e8c80ef2ad61466bc76fe425f80a (git) Affected: 6bd90e700b4285e6a7541e00f969cab0d696adde , < 299bc6d50b1bed7d1f408391736712f01a0855e2 (git) Affected: b17fcce70733c211cb5dabf54f4f9491920b1d92 (git) Affected: ba37807d08bae67de6139346a85650cab5f6145a (git) Affected: 683b0e397dad9f26a42dcacf6f7f545a77ce6c06 (git) Affected: 6.12.43 , < 6.13 (semver) Affected: 6.15.11 , < 6.16 (semver) Affected: 6.16.2 , < 6.17 (semver)
Linux	Linux	Affected: 6.17 Unaffected: 0 , < 6.17 (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/xe/xe_guc_exec_queue_types.h",
            "drivers/gpu/drm/xe/xe_guc_submit.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "77fd62412431e8c80ef2ad61466bc76fe425f80a",
              "status": "affected",
              "version": "6bd90e700b4285e6a7541e00f969cab0d696adde",
              "versionType": "git"
            },
            {
              "lessThan": "299bc6d50b1bed7d1f408391736712f01a0855e2",
              "status": "affected",
              "version": "6bd90e700b4285e6a7541e00f969cab0d696adde",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b17fcce70733c211cb5dabf54f4f9491920b1d92",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ba37807d08bae67de6139346a85650cab5f6145a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "683b0e397dad9f26a42dcacf6f7f545a77ce6c06",
              "versionType": "git"
            },
            {
              "lessThan": "6.13",
              "status": "affected",
              "version": "6.12.43",
              "versionType": "semver"
            },
            {
              "lessThan": "6.16",
              "status": "affected",
              "version": "6.15.11",
              "versionType": "semver"
            },
            {
              "lessThan": "6.17",
              "status": "affected",
              "version": "6.16.2",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/xe/xe_guc_exec_queue_types.h",
            "drivers/gpu/drm/xe/xe_guc_submit.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.17"
            },
            {
              "lessThan": "6.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.6",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.12.43",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.15.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.16.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/guc: Keep scheduler timeline name alive\n\nThe scheduler keeps a pointer to the timeline name, but q-\u003ename\nis freed with the exec queue while scheduler fences can still\nreference it.\n\nStore the name in struct xe_guc_exec_queue so it shares\nthe scheduler\u0027s RCU-deferred lifetime.\n\n(cherry picked from commit 41075f0eb5dcbd3b065d15f15ef7bbe9315188e8)"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - Exploitation requires ioctls on the local DRM render node (/dev/dri/renderD128) plus a sync_file fd held by the attacker\u0027s process; there is no remote or adjacent-network path into the xe exec-queue lifecycle.\nAC:L - No race is needed \u2014 once __xe_exec_queue_free() kfree()s the queue, sched-\u003ename is permanently dangling, so the attacker performs create-queue, export fence, destroy queue, groom the slab, then read, and can retry indefinitely.\nPR:L - XE_EXEC_QUEUE_CREATE/DESTROY, XE_EXEC, SYNCOBJ_EXPORT_SYNC_FILE and SYNC_IOC_FILE_INFO are all DRM_RENDER_ALLOW with no DRM_AUTH or capability gate, so any local user with render-node access (default for desktop sessions, Android/ChromeOS apps, GPU-passthrough containers) qualifies.\nUI:N - The attacker drives the whole sequence inside its own process using its own exec queue and its own exported fence; no victim action or configuration change is required.\nS:U - The use-after-free is on kernel slab memory and its impact stays inside the kernel\u0027s own security authority; no VM, IOMMU or hypervisor boundary is crossed.\nC:H - sync_fill_fence_info() strscpy()s from the freed q-\u003ename and copy_to_user()s the result, so after reallocating the freed xe_exec_queue slot the attacker reads back kernel heap contents (pointers, residual data) repeatably \u2014 a kernel memory disclosure primitive.\nI:H - This is a use-after-free on a kfree()d slab object whose contents the attacker grooms; the stale pointer is dereferenced as a string by kernel and tracepoint consumers, and UAF of an attacker-controllable slot is leverageable for corruption and control-flow influence.\nA:H - Dereferencing the dangling name pointer after the slab page is returned to the buddy allocator, or scanning for a NUL past the freed object, faults in kernel context and oopses the machine, which any unprivileged render-node user can trigger at will."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:04:29.739Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/77fd62412431e8c80ef2ad61466bc76fe425f80a"
        },
        {
          "url": "https://git.kernel.org/stable/c/299bc6d50b1bed7d1f408391736712f01a0855e2"
        }
      ],
      "title": "drm/xe/guc: Keep scheduler timeline name alive",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68383",
    "datePublished": "2026-08-10T12:04:02.230Z",
    "dateReserved": "2026-07-30T09:28:09.387Z",
    "dateUpdated": "2026-08-17T05:04:29.739Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

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GHSA-HF5H-J5WG-PF5G

CVE-2026-68383 (GCVE-0-2026-68383)

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Sightings

Nomenclature