CVE-2026-97429 (GCVE-0-2026-97429)
Vulnerability from cvelistv5
Published
2026-09-24 16:03
Modified
2026-10-03 10:58
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: fix UAF race in destroy_queue_cpsch wait_on_destroy_queue() drops locks to wait for queue resume, allowing a concurrent destroy to free the queue. Use is_being_destroyed flag to serialize destruction.
References
Impacted products
Vendor Product Version
Linux Linux Version: a70a93fa568b4f05aba548dadb673703eccf5480
Version: a70a93fa568b4f05aba548dadb673703eccf5480
Version: a70a93fa568b4f05aba548dadb673703eccf5480
Version: a70a93fa568b4f05aba548dadb673703eccf5480
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "090b51e2dabf88c02c0b6b25ea672a8bddfba7d5",
              "status": "affected",
              "version": "a70a93fa568b4f05aba548dadb673703eccf5480",
              "versionType": "git"
            },
            {
              "lessThan": "41144829f4645c2bd4cb501d34d253858f750c0a",
              "status": "affected",
              "version": "a70a93fa568b4f05aba548dadb673703eccf5480",
              "versionType": "git"
            },
            {
              "lessThan": "d98c8032c29944e1e572e1f49a0613d364fece0f",
              "status": "affected",
              "version": "a70a93fa568b4f05aba548dadb673703eccf5480",
              "versionType": "git"
            },
            {
              "lessThan": "ac081deaf16a639ea7dff2f285fe421a33c1ade0",
              "status": "affected",
              "version": "a70a93fa568b4f05aba548dadb673703eccf5480",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.5"
            },
            {
              "lessThan": "6.5",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "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": "6.6.158",
                  "versionStartIncluding": "6.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.111",
                  "versionStartIncluding": "6.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.53",
                  "versionStartIncluding": "6.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.5",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: fix UAF race in destroy_queue_cpsch\n\nwait_on_destroy_queue() drops locks to wait for queue resume, allowing\na concurrent destroy to free the queue. Use is_being_destroyed flag to\nserialize destruction."
        }
      ],
      "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 UAF is reached from kfd_ioctl_destroy_queue() via AMDKFD_IOC_DESTROY_QUEUE on /dev/kfd, which calls pqm_destroy_queue() then destroy_queue_cpsch() and wait_on_destroy_queue(); the trigger is that local ioctl, not a remote protocol message.\nAC:L - After kfd_ioctl_runtime_enable() and kfd_ioctl_set_debug_trap() (KFD_IOC_DBG_TRAP_ENABLE then KFD_IOC_DBG_TRAP_SUSPEND_QUEUES) set debug_trap_enabled and is_suspended, wait_on_destroy_queue() drops p-\u003emutex; a sibling thread then issues a second AMDKFD_IOC_DESTROY_QUEUE (or KFD_IOC_DBG_TRAP_DISABLE then destroy) and frees the same struct queue while the first sleeps.\nPR:L - kfd_open() has no capable() check, and AMDKFD_IOC_CREATE_QUEUE, AMDKFD_IOC_DESTROY_QUEUE, AMDKFD_IOC_RUNTIME_ENABLE and AMDKFD_IOC_DBG_TRAP are registered with flags 0; kfd_ioctl_set_debug_trap() skips the ptrace check when target==p, so an unprivileged /dev/kfd (render-group) user can trap, suspend and destroy their own queues.\nUI:N - The attacker opens their own /dev/kfd fd, enables debug trap on their own pid via kfd_ioctl_set_debug_trap(), suspends the queue with KFD_IOC_DBG_TRAP_SUSPEND_QUEUES, and issues the concurrent AMDKFD_IOC_DESTROY_QUEUE ioctls; no other user must mount, open, or interact.\nS:U - The use-after-free of struct queue in wait_on_destroy_queue()/destroy_queue_cpsch() and the later uninit_queue() in pqm_destroy_queue() stays in the host kernel that runs amdkfd; it is not a KVM/Xen guest-to-host escape or an IOMMU/DMA isolation bypass.\nC:H - While wait_on_destroy_queue() still evaluates q-\u003eproperties.is_suspended, the racing pqm_destroy_queue() path kfree()s the same struct queue via uninit_queue() and its MQD via mqd_mgr-\u003efree_mqd(); that slab UAF of kernel queue/MQD objects is an arbitrary-read primitive.\nI:H - The overlapping destroy_queue_cpsch() then pqm_destroy_queue() path list_del()s q-\u003elist and kfree()s both the queue and process_queue_node while the waiter still holds those pointers, so the slab can be sprayed into an arbitrary kernel write or control-flow hijack.\nA:H - Using the freed struct queue in wait_on_destroy_queue() or the rest of destroy_queue_cpsch() (list_del(\u0026q-\u003elist), free_mqd, uninit_queue) oopses the kernel; a use-after-free is scored High for availability even when not fully exploited."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-03T10:58:16.575Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/090b51e2dabf88c02c0b6b25ea672a8bddfba7d5"
        },
        {
          "url": "https://git.kernel.org/stable/c/41144829f4645c2bd4cb501d34d253858f750c0a"
        },
        {
          "url": "https://git.kernel.org/stable/c/d98c8032c29944e1e572e1f49a0613d364fece0f"
        },
        {
          "url": "https://git.kernel.org/stable/c/ac081deaf16a639ea7dff2f285fe421a33c1ade0"
        }
      ],
      "title": "drm/amdkfd: fix UAF race in destroy_queue_cpsch",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-97429",
    "datePublished": "2026-09-24T16:03:42.269Z",
    "dateReserved": "2026-09-24T14:53:16.868Z",
    "dateUpdated": "2026-10-03T10:58:16.575Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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