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CVE-2026-52966

Estado: AnalizadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

drm: Replace old pointer to new idr

Commit 5e28b7b94408 introduced a logical error by failing to replace the newly generated IDR pointer to old id's pointer at the correct location within the "change handle" logic; this resulted in the issue reported by syzbot [1].

Specifically, the new IDR object pointer is intended to replace the original id's pointer during the normal execution flow.

Additionally, an unnecessary conditional check for the ret exit path has been removed.

Detalles técnicos trazas, registros y código del informe original
[1]
!RB_EMPTY_ROOT(&prime_fpriv->dmabufs)
WARNING: drivers/gpu/drm/drm_prime.c:224 at drm_prime_destroy_file_private+0x48/0x60 drivers/gpu/drm/drm_prime.c:224, CPU#0: syz.0.17/5833
Call Trace:
 drm_file_free.part.0+0x7e6/0xcc0 drivers/gpu/drm/drm_file.c:269
 drm_file_free drivers/gpu/drm/drm_file.c:237 [inline]
 drm_close_helper.isra.0+0x186/0x200 drivers/gpu/drm/drm_file.c:290
 drm_release+0x1ab/0x360 drivers/gpu/drm/drm_file.c:438

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-52966",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "672464dd53231509c9c771110798c56d4660e19e",
              "lessThan": "318b995cffcfcaa69a234d28123a3f4ae186a9df",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "61bd96d3e5472c253f9c1ab77608f0c8aaa9d025",
              "lessThan": "38f12d0e10d83b66fa1466400d876a3a8da31542",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5e28b7b94408897e41c63477aabc9e1db439bc8c",
              "lessThan": "dc366607c41c45fd0ae6f3db090f31dd611b644a",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/gpu/drm/drm_gem.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.18.32",
              "lessThan": "6.18.33",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "7.0.9",
              "lessThan": "7.0.10",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "drivers/gpu/drm/drm_gem.c"
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-06-24T17:17:07.030",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/318b995cffcfcaa69a234d28123a3f4ae186a9df",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/38f12d0e10d83b66fa1466400d876a3a8da31542",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/dc366607c41c45fd0ae6f3db090f31dd611b644a",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm: Replace old pointer to new idr\n\nCommit 5e28b7b94408 introduced a logical error by failing to replace the\nnewly generated IDR pointer to old id's pointer at the correct location\nwithin the \"change handle\" logic; this resulted in the issue reported by\nsyzbot [1].\n\nSpecifically, the new IDR object pointer is intended to replace the original\nid's pointer during the normal execution flow.\n\nAdditionally, an unnecessary conditional check for the ret exit path has\nbeen removed.\n\n[1]\n!RB_EMPTY_ROOT(&prime_fpriv->dmabufs)\nWARNING: drivers/gpu/drm/drm_prime.c:224 at drm_prime_destroy_file_private+0x48/0x60 drivers/gpu/drm/drm_prime.c:224, CPU#0: syz.0.17/5833\nCall Trace:\n drm_file_free.part.0+0x7e6/0xcc0 drivers/gpu/drm/drm_file.c:269\n drm_file_free drivers/gpu/drm/drm_file.c:237 [inline]\n drm_close_helper.isra.0+0x186/0x200 drivers/gpu/drm/drm_file.c:290\n drm_release+0x1ab/0x360 drivers/gpu/drm/drm_file.c:438"
    }
  ],
  "lastModified": "2026-07-14T20:20:55.180",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.18.32:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C7375BE8-4505-4CEB-AA0F-F5D7B9AB272F"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0.9:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F50C4FF6-7312-456D-AAC7-C62ACBFB8BDB"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "EC732D08-5F7B-46D9-B154-E60C7F4F0A97"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}