CVE-2026-68245 (GCVE-0-2026-68245)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:01 – Updated: 2026-08-18 06:55
VLAI
Title
drm/amdgpu: fix lifetime issue of amdgpu_vm_get_task_info_pasid()
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix lifetime issue of amdgpu_vm_get_task_info_pasid() The vm pointer returned from amdgpu_vm_get_vm_from_pasid() is only valid while the lock is still being held. Once xa_unlock_irqrestore is called and returned, the pointer is no longer under lock and is subject to modification. Since, the caller still dereferences vm->task_info in amdgpu_vm_get_task_info_vm() after the lock is removed, this causes a use after unlock problem. Remove the lifetime issue present in amdgpu_vm_get_task_info_pasid() through removing the amdgpu_vm_get_vm_from_pasid() function from amdgpu_vm.c and making the relevant code inline to hold the lock while it is still in use. (cherry picked from commit 9d01579f3f868b333acc901815972685989092c7)
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: b8f67b9ddf4f8fe6dd536590712b5912ad78f99c , < fe16a7e5336ae888751984e30c451fbf7cfa5df7 (git)
Affected: b8f67b9ddf4f8fe6dd536590712b5912ad78f99c , < 1173190412fb9d12e7efce76734118d9712ff970 (git)
Affected: b8f67b9ddf4f8fe6dd536590712b5912ad78f99c , < 5d5fb9124a2bba96a7807086d8fe0f7ce810d546 (git)
Affected: b8f67b9ddf4f8fe6dd536590712b5912ad78f99c , < 04cc4aa3617b0ed67e859f91f09de5d896a46f3a (git)
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Linux Linux Affected: 6.9
Unaffected: 0 , < 6.9 (semver)
Unaffected: 6.12.101 , ≤ 6.12.* (semver)
Unaffected: 6.18.42 , ≤ 6.18.* (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/amd/amdgpu/amdgpu_vm.c"
          ],
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          "vendor": "Linux",
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              "versionType": "git"
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            "drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c"
          ],
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          "vendor": "Linux",
          "versions": [
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              "version": "6.9"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "version": "6.12.101",
              "versionType": "semver"
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              "versionType": "semver"
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              "version": "7.1.6",
              "versionType": "semver"
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          "nodes": [
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              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.101",
                  "versionStartIncluding": "6.9",
                  "vulnerable": true
                },
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                  "versionEndExcluding": "6.18.42",
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                },
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                },
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: fix lifetime issue of amdgpu_vm_get_task_info_pasid()\n\nThe vm pointer returned from amdgpu_vm_get_vm_from_pasid() is only\nvalid while the lock is still being held. Once xa_unlock_irqrestore is\ncalled and returned, the pointer is no longer under lock and is subject\nto modification. Since, the caller still dereferences vm-\u003etask_info in\namdgpu_vm_get_task_info_vm() after the lock is removed, this causes a\nuse after unlock problem.\n\nRemove the lifetime issue present in amdgpu_vm_get_task_info_pasid()\nthrough removing the amdgpu_vm_get_vm_from_pasid() function from\namdgpu_vm.c and making the relevant code inline to hold the lock while\nit is still in use.\n\n(cherry picked from commit 9d01579f3f868b333acc901815972685989092c7)"
        }
      ],
      "metrics": [
        {
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            "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 vulnerable code is reached through the amdgpu DRM device (render node) via command submission causing a GPU VM page fault or a ring timeout; this requires local access to /dev/dri/renderD*, with no network exposure.\nAC:L - The attacker controls both sides of the race: it can generate GPU page faults or job timeouts at will while concurrently closing DRM file descriptors to free the amdgpu_vm/fpriv, and can retry the race arbitrarily many times until it wins.\nPR:L - Only an unprivileged local account with access to the AMD GPU render node is needed; render nodes are world/group accessible by default on desktop, Android and container workloads, and no capability is checked on the CS/fault path.\nUI:N - The attacker\u0027s own processes generate the GPU faults and the concurrent VM teardown; no action by any other user is required.\nS:U - The corruption stays within the kernel\u0027s own security authority \u2014 the freed amdgpu_vm/amdgpu_task_info are kernel heap objects, with no crossing of a VM or IOMMU boundary.\nC:H - The stale vm pointer is dereferenced after free, reading vm-\u003etask_info out of reallocated kernel heap memory, and the resulting task_info contents (process name, pid, tgid) are then printed/exported, allowing disclosure of attacker-groomed or unrelated kernel data.\nI:H - kref_get() is performed on memory that may already be freed and reallocated, writing an increment into another object\u0027s fields, and the paired kref_put() can drop a foreign refcount to zero \u2014 a classic use-after-free/refcount-corruption primitive leveraged for arbitrary write and privilege escalation.\nA:H - The use-after-free occurs in a GPU interrupt handler and the reset/timeout path; dereferencing freed memory or corrupting a reused slab object readily oopses or panics the kernel, and it can be retriggered repeatedly."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-18T06:55:46.886Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/fe16a7e5336ae888751984e30c451fbf7cfa5df7"
        },
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          "url": "https://git.kernel.org/stable/c/1173190412fb9d12e7efce76734118d9712ff970"
        },
        {
          "url": "https://git.kernel.org/stable/c/5d5fb9124a2bba96a7807086d8fe0f7ce810d546"
        },
        {
          "url": "https://git.kernel.org/stable/c/04cc4aa3617b0ed67e859f91f09de5d896a46f3a"
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      ],
      "title": "drm/amdgpu: fix lifetime issue of amdgpu_vm_get_task_info_pasid()",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68245",
    "datePublished": "2026-08-10T12:01:11.501Z",
    "dateReserved": "2026-07-30T09:28:09.377Z",
    "dateUpdated": "2026-08-18T06:55:46.886Z",
    "state": "PUBLISHED"
  },
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      "date": "2026-08-20",
      "epss": "0.00163",
      "percentile": "0.06023"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-68245\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-10T13:20:12.960\",\"lastModified\":\"2026-08-18T07:16:50.833\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm/amdgpu: fix lifetime issue of amdgpu_vm_get_task_info_pasid()\\n\\nThe vm pointer returned from amdgpu_vm_get_vm_from_pasid() is only\\nvalid while the lock is still being held. Once xa_unlock_irqrestore is\\ncalled and returned, the pointer is no longer under lock and is subject\\nto modification. Since, the caller still dereferences vm-\u003etask_info in\\namdgpu_vm_get_task_info_vm() after the lock is removed, this causes a\\nuse after unlock problem.\\n\\nRemove the lifetime issue present in amdgpu_vm_get_task_info_pasid()\\nthrough removing the amdgpu_vm_get_vm_from_pasid() function from\\namdgpu_vm.c and making the relevant code inline to hold the lock while\\nit is still in use.\\n\\n(cherry picked from commit 9d01579f3f868b333acc901815972685989092c7)\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"b8f67b9ddf4f8fe6dd536590712b5912ad78f99c\",\"lessThan\":\"fe16a7e5336ae888751984e30c451fbf7cfa5df7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b8f67b9ddf4f8fe6dd536590712b5912ad78f99c\",\"lessThan\":\"1173190412fb9d12e7efce76734118d9712ff970\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b8f67b9ddf4f8fe6dd536590712b5912ad78f99c\",\"lessThan\":\"5d5fb9124a2bba96a7807086d8fe0f7ce810d546\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b8f67b9ddf4f8fe6dd536590712b5912ad78f99c\",\"lessThan\":\"04cc4aa3617b0ed67e859f91f09de5d896a46f3a\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.9\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.9\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.101\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.42\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.6\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/04cc4aa3617b0ed67e859f91f09de5d896a46f3a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1173190412fb9d12e7efce76734118d9712ff970\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5d5fb9124a2bba96a7807086d8fe0f7ce810d546\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fe16a7e5336ae888751984e30c451fbf7cfa5df7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-19T17:08:03+00:00",
      "cve": "CVE-2026-68245",
      "id": "CVE-2026-68245",
      "initial_release_date": "2026-08-10T00:00:00+00:00",
      "product_status:known_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: drm/amdgpu: fix lifetime issue of amdgpu_vm_get_task_info_pasid()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68245.json",
      "version": "3"
    }
  }
}



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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.

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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