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CVE-2023-52931 (GCVE-0-2023-52931)

Vulnerability from cvelistv5 – Published: 2025-03-27 16:37 – Updated: 2026-08-05 09:12
VLAI
Title
drm/i915: Avoid potential vm use-after-free
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/i915: Avoid potential vm use-after-free Adding the vm to the vm_xa table makes it visible to userspace, which could try to race with us to close the vm. So we need to take our extra reference before putting it in the table. (cherry picked from commit 99343c46d4e2b34c285d3d5f68ff04274c2f9fb4)
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: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-03-28 15:22 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 9ec8795e7d91bc650db03dc6f5315667555dae11 , < 764accc2c1b8fd1507be2e7f436c94cdce887a00 (git)
Affected: 9ec8795e7d91bc650db03dc6f5315667555dae11 , < 41d419382ec7e257e54b7b6ff0d3623aafb1316d (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.16
Unaffected: 0 , < 5.16 (semver)
Unaffected: 6.1.11 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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              "scenarios": [
                {
                  "lang": "en",
                  "value": "AV:L - The bug is reached only via DRM ioctls (I915_GEM_CONTEXT_GETPARAM / I915_GEM_VM_DESTROY) on a local i915 render or primary node; it is not reachable from the network stack or adjacent protocols.\nAC:L - The attacker controls both sides of the race from concurrent threads on the same DRM fd (GETPARAM publishing the vm into vm_xa vs VM_DESTROY), and the allocated vm_id is predictable under XA_FLAGS_ALLOC1, so success does not depend on conditions outside attacker control.\nPR:L - The affected ioctls are DRM_RENDER_ALLOW and require only an unprivileged open of /dev/dri/renderD* (typically render-group or session uaccess), not real root or init-namespace admin capabilities.\nUI:N - Exploitation is fully self-driven by the attacker\u0027s own ioctls after opening the render node; no separate victim action is required.\nS:U - A successful kernel UAF yields privilege escalation within the same host kernel security authority and does not cross a VM, IOMMU, or other explicit security boundary.\nC:H - The bug is a use-after-free of struct i915_address_space (ctx-\u003evm left dangling after an unmatched i915_vm_put), which can be reclaimed and leveraged for arbitrary kernel memory disclosure.\nI:H - The same UAF on a refcounted kernel object enables heap reuse and write primitives suitable for control-flow hijacking or arbitrary kernel memory modification.\nA:H - Triggering the race can free the live context VM and cause kernel oops/panic or GPU/context teardown failures, producing a full availability impact even without full exploitation."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T09:12:07.864Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/764accc2c1b8fd1507be2e7f436c94cdce887a00"
            },
            {
              "url": "https://git.kernel.org/stable/c/41d419382ec7e257e54b7b6ff0d3623aafb1316d"
            }
          ],
          "title": "drm/i915: Avoid potential vm use-after-free",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2023-52931",
        "datePublished": "2025-03-27T16:37:12.969Z",
        "dateReserved": "2024-08-21T06:07:11.019Z",
        "dateUpdated": "2026-08-05T09:12:07.864Z",
        "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

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.