CVE-2024-44978 (GCVE-0-2024-44978)

Vulnerability from cvelistv5 – Published: 2024-09-04 19:54 – Updated: 2026-08-05 11:37
VLAI
Title
drm/xe: Free job before xe_exec_queue_put
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/xe: Free job before xe_exec_queue_put Free job depends on job->vm being valid, the last xe_exec_queue_put can destroy the VM. Prevent UAF by freeing job before xe_exec_queue_put. (cherry picked from commit 32a42c93b74c8ca6d0915ea3eba21bceff53042f)
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 15:20 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: dd08ebf6c3525a7ea2186e636df064ea47281987 , < 98aa0330f200b9b8fb9e1298e006eda57a13351c (git)
Affected: dd08ebf6c3525a7ea2186e636df064ea47281987 , < 9e7f30563677fbeff62d368d5d2a5ac7aaa9746a (git)
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Linux Linux Affected: 6.8
Unaffected: 0 , < 6.8 (semver)
Unaffected: 6.10.7 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "98aa0330f200b9b8fb9e1298e006eda57a13351c",
                  "status": "affected",
                  "version": "dd08ebf6c3525a7ea2186e636df064ea47281987",
                  "versionType": "git"
                },
                {
                  "lessThan": "9e7f30563677fbeff62d368d5d2a5ac7aaa9746a",
                  "status": "affected",
                  "version": "dd08ebf6c3525a7ea2186e636df064ea47281987",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "drivers/gpu/drm/xe/xe_sched_job.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": "6.10.*",
                  "status": "unaffected",
                  "version": "6.10.7",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.11",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.10.7",
                      "versionStartIncluding": "6.8",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.11",
                      "versionStartIncluding": "6.8",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe: Free job before xe_exec_queue_put\n\nFree job depends on job-\u003evm being valid, the last xe_exec_queue_put can\ndestroy the VM. Prevent UAF by freeing job before xe_exec_queue_put.\n\n(cherry picked from commit 32a42c93b74c8ca6d0915ea3eba21bceff53042f)"
            }
          ],
          "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 - The vulnerability is reached only through DRM ioctls on the local Intel Xe render node (/dev/dri/renderD*) \u2014 XE_EXEC, XE_EXEC_QUEUE_CREATE/DESTROY \u2014 requiring an open file descriptor on the device. There is no remote or adjacent-network path to xe_sched_job_destroy().\nAC:L - The attacker controls every input to the bug: they create the VM and exec queue, submit the jobs, and destroy the queue so the final job reference triggers the put-before-free, and can drive the device into the wedged state to hit the fully synchronous kfree path. Where the free is deferred to a workqueue, the attacker owns both sides of the race and can retry indefinitely with heap grooming.\nPR:L - All ioctls on the path are marked DRM_RENDER_ALLOW with no DRM_AUTH, no DRM master requirement, and no capability check, so an ordinary unprivileged user with render-node access (default on desktop distros via logind ACLs, and common in GPU-enabled containers) can trigger it. No root or CAP_SYS_ADMIN is needed.\nUI:N - The attacker triggers the entire sequence from their own process with no victim action required. No file opening, mount, or interaction by another user is involved.\nS:U - The corruption is confined to kernel heap memory managed by the same kernel security authority as the attacking process. No hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - This is a use-after-free of struct xe_exec_queue plus a dereference of the already-freed xe_vm through a dangling pointer, and the attacker can reallocate the freed queue to control the pointer that is then read. Per kernel UAF guidance this yields attacker-influenced kernel memory disclosure.\nI:H - The stale q-\u003ewidth read selects which kmem_cache the job is returned to, so a sprayed replacement object produces a wrong-cache kmem_cache_free() and SLUB freelist corruption \u2014 a write primitive leveragable for control-flow hijack and privilege escalation. Per guidance, use-after-free is scored High for integrity.\nA:H - Even unexploited, dereferencing the freed exec queue and freed VM causes a kernel oops or panic, and mismatched slab frees corrupt allocator state leading to later crashes. Any unprivileged user with render-node access can repeat this at will."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T11:37:25.547Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/98aa0330f200b9b8fb9e1298e006eda57a13351c"
            },
            {
              "url": "https://git.kernel.org/stable/c/9e7f30563677fbeff62d368d5d2a5ac7aaa9746a"
            }
          ],
          "title": "drm/xe: Free job before xe_exec_queue_put",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2024-44978",
        "datePublished": "2024-09-04T19:54:29.559Z",
        "dateReserved": "2024-08-21T05:34:56.670Z",
        "dateUpdated": "2026-08-05T11:37:25.547Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.