CVE-2023-52921 (GCVE-0-2023-52921)

Vulnerability from cvelistv5 – Published: 2024-11-19 01:26 – Updated: 2026-08-05 09:12
VLAI
Title
drm/amdgpu: fix possible UAF in amdgpu_cs_pass1()
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix possible UAF in amdgpu_cs_pass1() Since the gang_size check is outside of chunk parsing loop, we need to reset i before we free the chunk data. Suggested by Ye Zhang (@VAR10CK) of Baidu Security.
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 2024-12-11 14:25 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 2ebf61f2cfb9a11bc17db30df3e675a4cd7418d3 , < e08e9dd09809b16f8f8cee8c466841b33d24ed96 (git)
Affected: 2ebf61f2cfb9a11bc17db30df3e675a4cd7418d3 , < 90e065677e0362a777b9db97ea21d43a39211399 (git)
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Linux Linux Affected: 6.2
Unaffected: 0 , < 6.2 (semver)
Unaffected: 6.4.11 , ≤ 6.4.* (semver)
Unaffected: 6.5 , ≤ * (original_commit_for_fix)
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Show details on NVD website
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                "value": "CWE-416"
              }
            ],
            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
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      "current_release_date": "2026-09-14T12:25:03+00:00",
      "cve": "CVE-2023-52921",
      "id": "CVE-2023-52921",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:known_affected": "76",
      "product_status:known_not_affected": "122",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: drm/amdgpu: fix possible UAF in amdgpu_cs_pass1()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-52921.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-11T02:23:58Z",
      "cve": "CVE-2023-52921",
      "id": "CVE-2023-52921",
      "initial_release_date": "2024-11-19T04:12:17Z",
      "product_status:known_affected": "361",
      "product_status:known_not_affected": "359",
      "product_status:recommended": "549",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-52921",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-52921.json",
      "version": "55"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "cvssV3_1": {
                  "attackComplexity": "LOW",
                  "attackVector": "LOCAL",
                  "availabilityImpact": "HIGH",
                  "baseScore": 7.8,
                  "baseSeverity": "HIGH",
                  "confidentialityImpact": "HIGH",
                  "integrityImpact": "HIGH",
                  "privilegesRequired": "LOW",
                  "scope": "UNCHANGED",
                  "userInteraction": "NONE",
                  "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "version": "3.1"
                }
              },
              {
                "other": {
                  "content": {
                    "id": "CVE-2023-52921",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2024-12-11T14:25:32.419190Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "problemTypes": [
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                "descriptions": [
                  {
                    "cweId": "CWE-416",
                    "description": "CWE-416 Use After Free",
                    "lang": "en",
                    "type": "CWE"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2024-12-11T14:25:33.741Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
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                  "status": "affected",
                  "version": "2ebf61f2cfb9a11bc17db30df3e675a4cd7418d3",
                  "versionType": "git"
                },
                {
                  "lessThan": "90e065677e0362a777b9db97ea21d43a39211399",
                  "status": "affected",
                  "version": "2ebf61f2cfb9a11bc17db30df3e675a4cd7418d3",
                  "versionType": "git"
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            {
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              "product": "Linux",
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "6.2"
                },
                {
                  "lessThan": "6.2",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.4.*",
                  "status": "unaffected",
                  "version": "6.4.11",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.5",
                  "versionType": "original_commit_for_fix"
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          ],
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                      "versionEndExcluding": "6.4.11",
                      "versionStartIncluding": "6.2",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.5",
                      "versionStartIncluding": "6.2",
                      "vulnerable": true
                    }
                  ],
                  "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 possible UAF in amdgpu_cs_pass1()\n\nSince the gang_size check is outside of chunk parsing\nloop, we need to reset i before we free the chunk data.\n\nSuggested by Ye Zhang (@VAR10CK) of Baidu Security."
            }
          ],
          "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 vulnerable path is reached via the AMDGPU_CS DRM ioctl on a local render/primary node (/dev/dri/renderD*), not via network packet processing or adjacent-network protocols.\nAC:L - An attacker reliably triggers the bug by opening the render node, creating a context, and submitting a command submission with accepted non-IB chunks (e.g. DEPENDENCIES/SYNCOBJ_*) so gang_size stays 0; no race or attacker-uncontrollable condition is required.\nPR:L - AMDGPU_CS is registered with DRM_AUTH|DRM_RENDER_ALLOW, so any unprivileged local user who can open the render node (typical video/render group membership on desktops, GPU-capable apps, Steam Deck, etc.) can reach the bug without root or init-namespace capabilities.\nUI:N - The attacker issues the ioctls themselves; no separate victim action such as mounting a filesystem or opening a malicious file is required.\nS:U - Impact is confined to the host kernel privilege boundary (local privilege escalation / memory corruption in amdgpu); this is not a VM escape, IOMMU bypass, or other cross-authority boundary crossing.\nC:H - The OOB kvfree of adjacent heap contents is an invalid/arbitrary free that enables classic UAF primitives after heap shaping, which per kernel CVSS guidance supports arbitrary memory disclosure.\nI:H - The same arbitrary-free/UAF primitive enables heap reuse and write primitives sufficient for control-flow hijacking or arbitrary kernel writes, so integrity impact is high.\nA:H - Freeing a garbage or live adjacent pointer readily causes kernel oops/panic or heap corruption crashes, so availability impact is high even without full exploitation."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T09:12:01.402Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
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              "url": "https://git.kernel.org/stable/c/e08e9dd09809b16f8f8cee8c466841b33d24ed96"
            },
            {
              "url": "https://git.kernel.org/stable/c/90e065677e0362a777b9db97ea21d43a39211399"
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      "cveMetadata": {
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        "assignerShortName": "Linux",
        "cveId": "CVE-2023-52921",
        "datePublished": "2024-11-19T01:26:30.495Z",
        "dateReserved": "2024-08-21T06:07:11.018Z",
        "dateUpdated": "2026-08-05T09:12:01.402Z",
        "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

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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.



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.