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
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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          "programFiles": [
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              "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."
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      "providerMetadata": {
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    "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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      "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",
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      "source": "SUSE CSAF VEX",
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      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-68314.json",
      "version": "9"
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}



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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

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.


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.