FKIE_CVE-2022-49827

Vulnerability from fkie_nvd - Published: 2025-05-01 15:16 - Updated: 2026-06-17 05:19
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: drm: Fix potential null-ptr-deref in drm_vblank_destroy_worker() drm_vblank_init() call drmm_add_action_or_reset() with drm_vblank_init_release() as action. If __drmm_add_action() failed, will directly call drm_vblank_init_release() with the vblank whose worker is NULL. As the resule, a null-ptr-deref will happen in kthread_destroy_worker(). Add the NULL check before calling drm_vblank_destroy_worker(). BUG: null-ptr-deref KASAN: null-ptr-deref in range [0x0000000000000068-0x000000000000006f] CPU: 5 PID: 961 Comm: modprobe Not tainted 6.0.0-11331-gd465bff130bf-dirty RIP: 0010:kthread_destroy_worker+0x25/0xb0 Call Trace: <TASK> drm_vblank_init_release+0x124/0x220 [drm] ? drm_crtc_vblank_restore+0x8b0/0x8b0 [drm] __drmm_add_action_or_reset+0x41/0x50 [drm] drm_vblank_init+0x282/0x310 [drm] vkms_init+0x35f/0x1000 [vkms] ? 0xffffffffc4508000 ? lock_is_held_type+0xd7/0x130 ? __kmem_cache_alloc_node+0x1c2/0x2b0 ? lock_is_held_type+0xd7/0x130 ? 0xffffffffc4508000 do_one_initcall+0xd0/0x4f0 ... do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x46/0xb0
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1d160dfb3fdf11ba9447e862c548447f91f4e74aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3acd2016421b2e628acad65495d15493bf7a3bc3Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4979524f5a2a8210e87fde2f642b0dc060860821Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e884a6c2d49a6c12761e5bed851e9fe93bd923a1Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/drm_internal.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "1d160dfb3fdf11ba9447e862c548447f91f4e74a",
              "status": "affected",
              "version": "5e6c2b4f916157e8f10d093d43e88b2a250d1774",
              "versionType": "git"
            },
            {
              "lessThan": "e884a6c2d49a6c12761e5bed851e9fe93bd923a1",
              "status": "affected",
              "version": "5e6c2b4f916157e8f10d093d43e88b2a250d1774",
              "versionType": "git"
            },
            {
              "lessThan": "3acd2016421b2e628acad65495d15493bf7a3bc3",
              "status": "affected",
              "version": "5e6c2b4f916157e8f10d093d43e88b2a250d1774",
              "versionType": "git"
            },
            {
              "lessThan": "4979524f5a2a8210e87fde2f642b0dc060860821",
              "status": "affected",
              "version": "5e6c2b4f916157e8f10d093d43e88b2a250d1774",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/drm_internal.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.9"
            },
            {
              "lessThan": "5.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.156",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.80",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
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              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              "versionEndExcluding": "5.10.156",
              "versionStartIncluding": "5.9",
              "vulnerable": true
            },
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              "matchCriteriaId": "51BBEF3B-79F5-4D4C-ADBA-F34DA0E2465C",
              "versionEndExcluding": "5.15.80",
              "versionStartIncluding": "5.11",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "64F9ADD1-3ADB-4D66-A00F-4A83010B05F0",
              "versionEndExcluding": "6.0.10",
              "versionStartIncluding": "5.16",
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            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "E7E331DA-1FB0-4DEC-91AC-7DA69D461C11",
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              "matchCriteriaId": "35B26BE4-43A6-4A36-A7F6-5B3F572D9186",
              "vulnerable": true
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          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm: Fix potential null-ptr-deref in drm_vblank_destroy_worker()\n\ndrm_vblank_init() call drmm_add_action_or_reset() with\ndrm_vblank_init_release() as action. If __drmm_add_action() failed, will\ndirectly call drm_vblank_init_release() with the vblank whose worker is\nNULL. As the resule, a null-ptr-deref will happen in\nkthread_destroy_worker(). Add the NULL check before calling\ndrm_vblank_destroy_worker().\n\nBUG: null-ptr-deref\nKASAN: null-ptr-deref in range [0x0000000000000068-0x000000000000006f]\nCPU: 5 PID: 961 Comm: modprobe Not tainted 6.0.0-11331-gd465bff130bf-dirty\nRIP: 0010:kthread_destroy_worker+0x25/0xb0\n  Call Trace:\n    \u003cTASK\u003e\n    drm_vblank_init_release+0x124/0x220 [drm]\n    ? drm_crtc_vblank_restore+0x8b0/0x8b0 [drm]\n    __drmm_add_action_or_reset+0x41/0x50 [drm]\n    drm_vblank_init+0x282/0x310 [drm]\n    vkms_init+0x35f/0x1000 [vkms]\n    ? 0xffffffffc4508000\n    ? lock_is_held_type+0xd7/0x130\n    ? __kmem_cache_alloc_node+0x1c2/0x2b0\n    ? lock_is_held_type+0xd7/0x130\n    ? 0xffffffffc4508000\n    do_one_initcall+0xd0/0x4f0\n    ...\n    do_syscall_64+0x35/0x80\n    entry_SYSCALL_64_after_hwframe+0x46/0xb0"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm: Se corrige la posible desreferencia PTR nula en la llamada drm_vblank_destroy_worker(). drm_vblank_init() llama a drmm_add_action_or_reset() con la acci\u00f3n drm_vblank_init_release(). Si __drmm_add_action() falla, se llamar\u00e1 directamente a drm_vblank_init_release() con el vblank cuyo trabajador sea NULL. Como resultado, se producir\u00e1 una desreferencia PTR nula en kthread_destroy_worker(). Se a\u00f1ade la comprobaci\u00f3n de valores NULL antes de llamar a drm_vblank_destroy_worker(). ERROR: null-ptr-deref KASAN: null-ptr-deref en el rango [0x0000000000000068-0x000000000000006f] CPU: 5 PID: 961 Comm: modprobe No contaminado 6.0.0-11331-gd465bff130bf-dirty RIP: 0010:kthread_destroy_worker+0x25/0xb0 Seguimiento de llamadas:   drm_vblank_init_release+0x124/0x220 [drm] ? drm_crtc_vblank_restore+0x8b0/0x8b0 [drm] __drmm_add_action_or_reset+0x41/0x50 [drm] drm_vblank_init+0x282/0x310 [drm] vkms_init+0x35f/0x1000 [vkms] ? 0xffffffffc4508000 ? lock_is_held_type+0xd7/0x130 ? __kmem_cache_alloc_node+0x1c2/0x2b0 ? lock_is_held_type+0xd7/0x130 ? 0xffffffffc4508000 do_one_initcall+0xd0/0x4f0 ... do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 "
    }
  ],
  "id": "CVE-2022-49827",
  "lastModified": "2026-06-17T05:19:14.493",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "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"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-05-01T15:16:06.150",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/1d160dfb3fdf11ba9447e862c548447f91f4e74a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/3acd2016421b2e628acad65495d15493bf7a3bc3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "url": "https://git.kernel.org/stable/c/4979524f5a2a8210e87fde2f642b0dc060860821"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/e884a6c2d49a6c12761e5bed851e9fe93bd923a1"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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