FKIE_CVE-2025-21671

Vulnerability from fkie_nvd - Published: 2025-01-31 12:15 - Updated: 2026-06-17 08:43
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: zram: fix potential UAF of zram table If zram_meta_alloc failed early, it frees allocated zram->table without setting it NULL. Which will potentially cause zram_meta_free to access the table if user reset an failed and uninitialized device.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/212fe1c0df4a150fb6298db2cfff267ceaba5402Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/571d3f6045cd3a6d9f6aec33b678f3ffe97582efPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/902ef8f16d5ca77edc77c30656be54186c1e99b7Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fe3de867f94819ba0f28e035c0b0182150147d95Patch
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/block/zram/zram_drv.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "fe3de867f94819ba0f28e035c0b0182150147d95",
              "status": "affected",
              "version": "ac3b5366b9b7c9d97b606532ceab43d2329a22f3",
              "versionType": "git"
            },
            {
              "lessThan": "571d3f6045cd3a6d9f6aec33b678f3ffe97582ef",
              "status": "affected",
              "version": "0b5b0b65561b34e6e360de317e4bcd031bfabf42",
              "versionType": "git"
            },
            {
              "lessThan": "902ef8f16d5ca77edc77c30656be54186c1e99b7",
              "status": "affected",
              "version": "6fb92e9a52e3feae309a213950f21dfcd1eb0b40",
              "versionType": "git"
            },
            {
              "lessThan": "212fe1c0df4a150fb6298db2cfff267ceaba5402",
              "status": "affected",
              "version": "74363ec674cb172d8856de25776c8f3103f05e2f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/block/zram/zram_drv.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6.1.127",
              "status": "affected",
              "version": "6.1.122",
              "versionType": "semver"
            },
            {
              "lessThan": "6.6.74",
              "status": "affected",
              "version": "6.6.68",
              "versionType": "semver"
            },
            {
              "lessThan": "6.12.11",
              "status": "affected",
              "version": "6.12.7",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "7318159A-C85D-4CB0-AEE8-F8203E4D319C",
              "versionEndExcluding": "6.1.127",
              "versionStartIncluding": "6.1.122",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "BF52E59F-B164-40CD-9AD0-3AD081FC1BD3",
              "versionEndExcluding": "6.6.74",
              "versionStartIncluding": "6.6.68",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "125A873D-530A-4FEE-BBCF-242EFC3271CD",
              "versionEndExcluding": "6.12.11",
              "versionStartIncluding": "6.12.7",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nzram: fix potential UAF of zram table\n\nIf zram_meta_alloc failed early, it frees allocated zram-\u003etable without\nsetting it NULL.  Which will potentially cause zram_meta_free to access\nthe table if user reset an failed and uninitialized device."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: zram: se corrige el UAF potencial de la tabla zram. Si zram_meta_alloc falla antes, libera la tabla zram-\u0026gt; asignada sin configurarla como NULL. Esto potencialmente har\u00e1 que zram_meta_free acceda a la tabla si el usuario reinicia un dispositivo fallido y no inicializado."
    }
  ],
  "id": "CVE-2025-21671",
  "lastModified": "2026-06-17T08:43:58.957",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "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"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      },
      {
        "cvssData": {
          "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"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-21671",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-02-10T17:11:50.678589Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-01-31T12:15:28.263",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/212fe1c0df4a150fb6298db2cfff267ceaba5402"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/571d3f6045cd3a6d9f6aec33b678f3ffe97582ef"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/902ef8f16d5ca77edc77c30656be54186c1e99b7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/fe3de867f94819ba0f28e035c0b0182150147d95"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}



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