CVE-2025-68314 (GCVE-0-2025-68314)

Vulnerability from cvelistv5 – Published: 2025-12-16 15:39 – Updated: 2026-08-05 12:10
VLAI
Title
drm/msm: make sure last_fence is always updated
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/msm: make sure last_fence is always updated Update last_fence in the vm-bind path instead of kernel managed path. last_fence is used to wait for work to finish in vm_bind contexts but not used for kernel managed contexts. This fixes a bug where last_fence is not waited on context close leading to faults as resources are freed while in use. Patchwork: https://patchwork.freedesktop.org/patch/680080/
Severity
8.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7100 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 92395af63a9958615edfa9d4ef1ea72c92a00410 , < 8ee817ceafba266d9c6f3a09babd2ac7441d9a2b (git)
Affected: 92395af63a9958615edfa9d4ef1ea72c92a00410 , < 86404a9e3013d814a772ac407573be5d3cd4ee0d (git)
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Linux Linux Affected: 6.17
Unaffected: 0 , < 6.17 (semver)
Unaffected: 6.17.8 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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      "affected": [
        {
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          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/msm/msm_gem_submit.c"
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          "nodes": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/msm: make sure last_fence is always updated\n\nUpdate last_fence in the vm-bind path instead of kernel managed path.\n\nlast_fence is used to wait for work to finish in vm_bind contexts but not\nused for kernel managed contexts.\n\nThis fixes a bug where last_fence is not waited on context close leading\nto faults as resources are freed while in use.\n\nPatchwork: https://patchwork.freedesktop.org/patch/680080/"
        }
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      "metrics": [
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerability is reached through DRM MSM render-node ioctls for VM_BIND setup, GPU submission, and context closure, requiring local device access.\nAC:L - The attacker controls the mappings, command stream, workload duration, and close timing; the missing VM_BIND fence update is deterministic and requires no uncontrollable race.\nPR:L - The required ioctls are DRM_RENDER_ALLOW and have no capability check, so any ordinary user granted render-node access can trigger the flaw.\nUI:N - Exploitation requires only attacker-controlled ioctl and close operations, with no victim action.\nS:C - In-flight GPU DMA can survive teardown of its per-process VM mappings and reach recycled pages belonging to the kernel or another client, crossing the GPU/IOMMU isolation boundary.\nC:H - Mapped GEM pages can be released while attacker-programmed GPU reads remain in flight. Reallocation of those pages can expose kernel or other-process memory through a retained shared destination.\nI:H - In-flight GPU writes can target freed pages after they are recycled into kernel or other-client allocations, enabling potentially arbitrary memory corruption.\nA:H - The premature unmapping causes GPU translation faults and hangs that require shared-GPU recovery or reset. An unprivileged attacker can repeat the trigger, potentially making graphics-dependent systems unavailable."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:10:48.766Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
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          "url": "https://git.kernel.org/stable/c/8ee817ceafba266d9c6f3a09babd2ac7441d9a2b"
        },
        {
          "url": "https://git.kernel.org/stable/c/86404a9e3013d814a772ac407573be5d3cd4ee0d"
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      "title": "drm/msm: make sure last_fence is always updated",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68314",
    "datePublished": "2025-12-16T15:39:44.791Z",
    "dateReserved": "2025-12-16T14:48:05.295Z",
    "dateUpdated": "2026-08-05T12:10:48.766Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
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      "date": "2026-10-18",
      "epss": "0.00133",
      "percentile": "0.02548"
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                "programFiles": [
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                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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                "vendor": "Linux",
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        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/msm: make sure last_fence is always updated\n\nUpdate last_fence in the vm-bind path instead of kernel managed path.\n\nlast_fence is used to wait for work to finish in vm_bind contexts but not\nused for kernel managed contexts.\n\nThis fixes a bug where last_fence is not waited on context close leading\nto faults as resources are freed while in use.\n\nPatchwork: https://patchwork.freedesktop.org/patch/680080/"
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndrm/msm: asegurar que last_fence siempre se actualice\n\nActualizar last_fence en la ruta de vm-bind en lugar de la ruta gestionada por el kernel.\n\nlast_fence se utiliza para esperar a que el trabajo termine en contextos de vm_bind, pero no se utiliza para contextos gestionados por el kernel.\n\nEsto corrige un error donde no se espera a last_fence al cerrar el contexto, lo que lleva a fallos ya que los recursos se liberan mientras est\u00e1n en uso.\n\nPatchwork: https://patchwork.freedesktop.org/patch/680080/"
          }
        ],
        "id": "CVE-2025-68314",
        "lastModified": "2026-10-14T16:10:00.250",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 8.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "CHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
                "version": "3.1"
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              "impactScore": 6.0,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
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        "published": "2025-12-16T16:16:10.983",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/86404a9e3013d814a772ac407573be5d3cd4ee0d"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/8ee817ceafba266d9c6f3a09babd2ac7441d9a2b"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Deferred"
      }
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-20T10:20:26+00:00",
      "cve": "CVE-2025-68314",
      "id": "CVE-2025-68314",
      "initial_release_date": "2025-12-16T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel drm/msm: Privilege escalation or information disclosure due to improper last_fence update",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68314.json",
      "version": "3"
    }
  }
}



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