CVE-2022-50369 (GCVE-0-2022-50369)

Vulnerability from cvelistv5 – Published: 2025-09-17 14:56 – Updated: 2026-05-11 19:18
VLAI
Title
drm/vkms: Fix null-ptr-deref in vkms_release()
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/vkms: Fix null-ptr-deref in vkms_release() A null-ptr-deref is triggered when it tries to destroy the workqueue in vkms->output.composer_workq in vkms_release(). KASAN: null-ptr-deref in range [0x0000000000000118-0x000000000000011f] CPU: 5 PID: 17193 Comm: modprobe Not tainted 6.0.0-11331-gd465bff130bf #24 RIP: 0010:destroy_workqueue+0x2f/0x710 ... Call Trace: <TASK> ? vkms_config_debugfs_init+0x50/0x50 [vkms] __devm_drm_dev_alloc+0x15a/0x1c0 [drm] vkms_init+0x245/0x1000 [vkms] do_one_initcall+0xd0/0x4f0 do_init_module+0x1a4/0x680 load_module+0x6249/0x7110 __do_sys_finit_module+0x140/0x200 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 The reason is that an OOM happened which triggers the destroy of the workqueue, however, the workqueue is alloced in the later process, thus a null-ptr-deref happened. A simple call graph is shown as below: vkms_init() vkms_create() devm_drm_dev_alloc() __devm_drm_dev_alloc() devm_drm_dev_init() devm_add_action_or_reset() devm_add_action() # an error happened devm_drm_dev_init_release() drm_dev_put() kref_put() drm_dev_release() vkms_release() destroy_workqueue() # null-ptr-deref happened vkms_modeset_init() vkms_output_init() vkms_crtc_init() # where the workqueue get allocated Fix this by checking if composer_workq is NULL before passing it to the destroy_workqueue() in vkms_release().
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-14 18:35 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 6c234fe37c57627a5baf96f552afa1fae2b67d4d , < 0b8f390e2251191f1b179cc87f65d54c96565f0d (git)
Affected: 6c234fe37c57627a5baf96f552afa1fae2b67d4d , < 1f9836f95271e7acf016667eee0aeae3386f9645 (git)
Affected: 6c234fe37c57627a5baf96f552afa1fae2b67d4d , < 596f1ba3987e601e31a5abf1f75ce1d2635aceac (git)
Affected: 6c234fe37c57627a5baf96f552afa1fae2b67d4d , < 57031c474c3a920ea73afeb5dc352e537f5793ee (git)
Affected: 6c234fe37c57627a5baf96f552afa1fae2b67d4d , < 2fe2a8f40c21161ffe7653cc234e7934db5b7cc5 (git)
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Linux Linux Affected: 4.20
Unaffected: 0 , < 4.20 (semver)
Unaffected: 5.10.173 , ≤ 5.10.* (semver)
Unaffected: 5.15.99 , ≤ 5.15.* (semver)
Unaffected: 6.1.16 , ≤ 6.1.* (semver)
Unaffected: 6.2.3 , ≤ 6.2.* (semver)
Unaffected: 6.3 , ≤ * (original_commit_for_fix)
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vkms: Fix null-ptr-deref in vkms_release()\n\nA null-ptr-deref is triggered when it tries to destroy the workqueue in\nvkms-\u003eoutput.composer_workq in vkms_release().\n\n KASAN: null-ptr-deref in range [0x0000000000000118-0x000000000000011f]\n CPU: 5 PID: 17193 Comm: modprobe Not tainted 6.0.0-11331-gd465bff130bf #24\n RIP: 0010:destroy_workqueue+0x2f/0x710\n ...\n Call Trace:\n  \u003cTASK\u003e\n  ? vkms_config_debugfs_init+0x50/0x50 [vkms]\n  __devm_drm_dev_alloc+0x15a/0x1c0 [drm]\n  vkms_init+0x245/0x1000 [vkms]\n  do_one_initcall+0xd0/0x4f0\n  do_init_module+0x1a4/0x680\n  load_module+0x6249/0x7110\n  __do_sys_finit_module+0x140/0x200\n  do_syscall_64+0x35/0x80\n  entry_SYSCALL_64_after_hwframe+0x46/0xb0\n\nThe reason is that an OOM happened which triggers the destroy of the\nworkqueue, however, the workqueue is alloced in the later process,\nthus a null-ptr-deref happened. A simple call graph is shown as below:\n\n vkms_init()\n  vkms_create()\n    devm_drm_dev_alloc()\n      __devm_drm_dev_alloc()\n        devm_drm_dev_init()\n          devm_add_action_or_reset()\n            devm_add_action() # an error happened\n            devm_drm_dev_init_release()\n              drm_dev_put()\n                kref_put()\n                  drm_dev_release()\n                    vkms_release()\n                      destroy_workqueue() # null-ptr-deref happened\n    vkms_modeset_init()\n      vkms_output_init()\n        vkms_crtc_init() # where the workqueue get allocated\n\nFix this by checking if composer_workq is NULL before passing it to\nthe destroy_workqueue() in vkms_release()."
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            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/57031c474c3a920ea73afeb5dc352e537f5793ee"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/596f1ba3987e601e31a5abf1f75ce1d2635aceac"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-476"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          },
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-476"
              }
            ],
            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-21T18:45:59+00:00",
      "cve": "CVE-2022-50369",
      "id": "CVE-2022-50369",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:fixed": "434",
      "product_status:known_affected": "108",
      "product_status:known_not_affected": "118",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: drm/vkms: Fix null-ptr-deref in vkms_release()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50369.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T01:24:18Z",
      "cve": "CVE-2022-50369",
      "id": "CVE-2022-50369",
      "initial_release_date": "2025-09-18T23:43:44Z",
      "product_status:known_affected": "419",
      "product_status:known_not_affected": "359",
      "product_status:recommended": "255",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-50369",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-50369.json",
      "version": "42"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "cvssV3_1": {
                  "attackComplexity": "LOW",
                  "attackVector": "LOCAL",
                  "availabilityImpact": "HIGH",
                  "baseScore": 5.5,
                  "baseSeverity": "MEDIUM",
                  "confidentialityImpact": "NONE",
                  "integrityImpact": "NONE",
                  "privilegesRequired": "LOW",
                  "scope": "UNCHANGED",
                  "userInteraction": "NONE",
                  "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "version": "3.1"
                }
              },
              {
                "other": {
                  "content": {
                    "id": "CVE-2022-50369",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-01-14T18:35:42.545980Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "problemTypes": [
              {
                "descriptions": [
                  {
                    "cweId": "CWE-476",
                    "description": "CWE-476 NULL Pointer Dereference",
                    "lang": "en",
                    "type": "CWE"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-01-14T18:35:38.275Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "drivers/gpu/drm/vkms/vkms_drv.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "0b8f390e2251191f1b179cc87f65d54c96565f0d",
                  "status": "affected",
                  "version": "6c234fe37c57627a5baf96f552afa1fae2b67d4d",
                  "versionType": "git"
                },
                {
                  "lessThan": "1f9836f95271e7acf016667eee0aeae3386f9645",
                  "status": "affected",
                  "version": "6c234fe37c57627a5baf96f552afa1fae2b67d4d",
                  "versionType": "git"
                },
                {
                  "lessThan": "596f1ba3987e601e31a5abf1f75ce1d2635aceac",
                  "status": "affected",
                  "version": "6c234fe37c57627a5baf96f552afa1fae2b67d4d",
                  "versionType": "git"
                },
                {
                  "lessThan": "57031c474c3a920ea73afeb5dc352e537f5793ee",
                  "status": "affected",
                  "version": "6c234fe37c57627a5baf96f552afa1fae2b67d4d",
                  "versionType": "git"
                },
                {
                  "lessThan": "2fe2a8f40c21161ffe7653cc234e7934db5b7cc5",
                  "status": "affected",
                  "version": "6c234fe37c57627a5baf96f552afa1fae2b67d4d",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "drivers/gpu/drm/vkms/vkms_drv.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "4.20"
                },
                {
                  "lessThan": "4.20",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.10.*",
                  "status": "unaffected",
                  "version": "5.10.173",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.15.*",
                  "status": "unaffected",
                  "version": "5.15.99",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.1.*",
                  "status": "unaffected",
                  "version": "6.1.16",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.2.*",
                  "status": "unaffected",
                  "version": "6.2.3",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.3",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.10.173",
                      "versionStartIncluding": "4.20",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.99",
                      "versionStartIncluding": "4.20",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.16",
                      "versionStartIncluding": "4.20",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.2.3",
                      "versionStartIncluding": "4.20",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.3",
                      "versionStartIncluding": "4.20",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vkms: Fix null-ptr-deref in vkms_release()\n\nA null-ptr-deref is triggered when it tries to destroy the workqueue in\nvkms-\u003eoutput.composer_workq in vkms_release().\n\n KASAN: null-ptr-deref in range [0x0000000000000118-0x000000000000011f]\n CPU: 5 PID: 17193 Comm: modprobe Not tainted 6.0.0-11331-gd465bff130bf #24\n RIP: 0010:destroy_workqueue+0x2f/0x710\n ...\n Call Trace:\n  \u003cTASK\u003e\n  ? vkms_config_debugfs_init+0x50/0x50 [vkms]\n  __devm_drm_dev_alloc+0x15a/0x1c0 [drm]\n  vkms_init+0x245/0x1000 [vkms]\n  do_one_initcall+0xd0/0x4f0\n  do_init_module+0x1a4/0x680\n  load_module+0x6249/0x7110\n  __do_sys_finit_module+0x140/0x200\n  do_syscall_64+0x35/0x80\n  entry_SYSCALL_64_after_hwframe+0x46/0xb0\n\nThe reason is that an OOM happened which triggers the destroy of the\nworkqueue, however, the workqueue is alloced in the later process,\nthus a null-ptr-deref happened. A simple call graph is shown as below:\n\n vkms_init()\n  vkms_create()\n    devm_drm_dev_alloc()\n      __devm_drm_dev_alloc()\n        devm_drm_dev_init()\n          devm_add_action_or_reset()\n            devm_add_action() # an error happened\n            devm_drm_dev_init_release()\n              drm_dev_put()\n                kref_put()\n                  drm_dev_release()\n                    vkms_release()\n                      destroy_workqueue() # null-ptr-deref happened\n    vkms_modeset_init()\n      vkms_output_init()\n        vkms_crtc_init() # where the workqueue get allocated\n\nFix this by checking if composer_workq is NULL before passing it to\nthe destroy_workqueue() in vkms_release()."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-05-11T19:18:13.484Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/0b8f390e2251191f1b179cc87f65d54c96565f0d"
            },
            {
              "url": "https://git.kernel.org/stable/c/1f9836f95271e7acf016667eee0aeae3386f9645"
            },
            {
              "url": "https://git.kernel.org/stable/c/596f1ba3987e601e31a5abf1f75ce1d2635aceac"
            },
            {
              "url": "https://git.kernel.org/stable/c/57031c474c3a920ea73afeb5dc352e537f5793ee"
            },
            {
              "url": "https://git.kernel.org/stable/c/2fe2a8f40c21161ffe7653cc234e7934db5b7cc5"
            }
          ],
          "title": "drm/vkms: Fix null-ptr-deref in vkms_release()",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2022-50369",
        "datePublished": "2025-09-17T14:56:24.889Z",
        "dateReserved": "2025-09-17T14:53:06.995Z",
        "dateUpdated": "2026-05-11T19:18:13.484Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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