Vulnerability-Lookup

FKIE_CVE-2025-21772

Vulnerability from fkie_nvd - Published: 2025-02-27 03:15 - Updated: 2026-07-30 06:21

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: partitions: mac: fix handling of bogus partition table Fix several issues in partition probing: - The bailout for a bad partoffset must use put_dev_sector(), since the preceding read_part_sector() succeeded. - If the partition table claims a silly sector size like 0xfff bytes (which results in partition table entries straddling sector boundaries), bail out instead of accessing out-of-bounds memory. - We must not assume that the partition table contains proper NUL termination - use strnlen() and strncmp() instead of strlen() and strcmp().

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/213ba5bd81b7e97ac6e6190b8f3bc6ba76123625	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/27a39d006f85e869be68c1d5d2ce05e5d6445bf5	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/40a35d14f3c0dc72b689061ec72fc9b193f37d1f	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6578717ebca91678131d2b1f4ba4258e60536e9f	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7fa9706722882f634090bfc9af642bf9ed719e27	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/80e648042e512d5a767da251d44132553fe04ae0	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/92527100be38ede924768f4277450dfe8a40e16b	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a3e77da9f843e4ab93917d30c314f0283e28c124	Patch
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
0b142b55-0307-4c5a-b3c9-f314f3fb7c5e	https://cert-portal.siemens.com/productcert/html/ssa-265688.html

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.14
linux	linux_kernel	6.14

JSON

To clipboard

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            },
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              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.13.4",
              "versionType": "semver"
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              "lessThanOrEqual": "*",
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      ],
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    },
    {
      "affectedData": [
        {
          "defaultStatus": "unknown",
          "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
          "vendor": "Siemens",
          "versions": [
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              "lessThan": "*",
              "status": "affected",
              "version": "0",
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            }
          ]
        }
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    }
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npartitions: mac: fix handling of bogus partition table\n\nFix several issues in partition probing:\n\n - The bailout for a bad partoffset must use put_dev_sector(), since the\n   preceding read_part_sector() succeeded.\n - If the partition table claims a silly sector size like 0xfff bytes\n   (which results in partition table entries straddling sector boundaries),\n   bail out instead of accessing out-of-bounds memory.\n - We must not assume that the partition table contains proper NUL\n   termination - use strnlen() and strncmp() instead of strlen() and\n   strcmp()."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: particiones: mac: se corrige el manejo de la tabla de particiones falsa Corrige varios problemas en el sondeo de particiones: - El rescate para un partoffset incorrecto debe usar put_dev_sector(), ya que el read_part_sector() anterior tuvo \u00e9xito. - Si la tabla de particiones reclama un tama\u00f1o de sector tonto como 0xfff bytes (lo que da como resultado que las entradas de la tabla de particiones se extiendan a ambos lados de los l\u00edmites del sector), salga en lugar de acceder a la memoria fuera de los l\u00edmites. - No debemos asumir que la tabla de particiones contiene la terminaci\u00f3n NUL adecuada: use strnlen() y strncmp() en lugar de strlen() y strcmp()."
    }
  ],
  "id": "CVE-2025-21772",
  "lastModified": "2026-07-30T06:21:30.060",
  "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": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
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          "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"
      }
    ]
  },
  "published": "2025-02-27T03:15:17.867",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
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      "url": "https://git.kernel.org/stable/c/213ba5bd81b7e97ac6e6190b8f3bc6ba76123625"
    },
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      "url": "https://git.kernel.org/stable/c/27a39d006f85e869be68c1d5d2ce05e5d6445bf5"
    },
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    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/6578717ebca91678131d2b1f4ba4258e60536e9f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    {
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    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    },
    {
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      "tags": [
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    },
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      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html"
    },
    {
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      "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
    },
    {
      "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2025-21772 (GCVE-0-2025-21772)

Vulnerability from cvelistv5 – Published: 2025-02-27 02:18 – Updated: 2026-08-05 11:54

Title

partitions: mac: fix handling of bogus partition table

Summary

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

11 references

URL	Tags
https://git.kernel.org/stable/c/a3e77da9f843e4ab9…
https://git.kernel.org/stable/c/213ba5bd81b7e97ac…
https://git.kernel.org/stable/c/40a35d14f3c0dc72b…
https://git.kernel.org/stable/c/27a39d006f85e869b…
https://git.kernel.org/stable/c/92527100be38ede92…
https://git.kernel.org/stable/c/6578717ebca916781…
https://git.kernel.org/stable/c/7fa9706722882f634…
https://git.kernel.org/stable/c/80e648042e512d5a7…
https://lists.debian.org/debian-lts-announce/2025…
https://lists.debian.org/debian-lts-announce/2025…
https://cert-portal.siemens.com/productcert/html/…

Impacted products

3 products

Vendor	Product	Version
Linux	Linux	Affected: 02e2a5bfebe99edcf9d694575a75032d53fe1b73 , < a3e77da9f843e4ab93917d30c314f0283e28c124 (git) Affected: 02e2a5bfebe99edcf9d694575a75032d53fe1b73 , < 213ba5bd81b7e97ac6e6190b8f3bc6ba76123625 (git) Affected: 02e2a5bfebe99edcf9d694575a75032d53fe1b73 , < 40a35d14f3c0dc72b689061ec72fc9b193f37d1f (git) Affected: 02e2a5bfebe99edcf9d694575a75032d53fe1b73 , < 27a39d006f85e869be68c1d5d2ce05e5d6445bf5 (git) Affected: 02e2a5bfebe99edcf9d694575a75032d53fe1b73 , < 92527100be38ede924768f4277450dfe8a40e16b (git) Affected: 02e2a5bfebe99edcf9d694575a75032d53fe1b73 , < 6578717ebca91678131d2b1f4ba4258e60536e9f (git) Affected: 02e2a5bfebe99edcf9d694575a75032d53fe1b73 , < 7fa9706722882f634090bfc9af642bf9ed719e27 (git) Affected: 02e2a5bfebe99edcf9d694575a75032d53fe1b73 , < 80e648042e512d5a767da251d44132553fe04ae0 (git) Affected: 81a319c5c29913a23947f3d28513974682f3af03 (git) Affected: 34a906cd9f6445d9510841667eff0d980279ebf3 (git) Affected: 2a27f61bd411e564eb4651c18d225f6e9e1de534 (git) Affected: 69aad7e01c8e883e9d2f8dc5523bd419bd02d2aa (git) Affected: 7f4f03c4a1e9a4b9679feafe7625a780864a4e76 (git) Affected: 3.2.75 , < 3.3 (semver) Affected: 3.4.113 , < 3.5 (semver) Affected: 3.10.99 , < 3.11 (semver) Affected: 3.12.56 , < 3.13 (semver) Affected: 3.14.63 , < 3.15 (semver)
Linux	Linux	Affected: 4.4 Unaffected: 0 , < 4.4 (semver) Unaffected: 5.4.291 , ≤ 5.4.* (semver) Unaffected: 5.10.235 , ≤ 5.10.* (semver) Unaffected: 5.15.179 , ≤ 5.15.* (semver) Unaffected: 6.1.129 , ≤ 6.1.* (semver) Unaffected: 6.6.79 , ≤ 6.6.* (semver) Unaffected: 6.12.16 , ≤ 6.12.* (semver) Unaffected: 6.13.4 , ≤ 6.13.* (semver) Unaffected: 6.14 , ≤ * (original_commit_for_fix)
Siemens	SIMATIC S7-1500 TM MFP - GNU/Linux subsystem	Affected: 0 , < * (custom)

Show details on NVD website

JSON

To clipboard

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          "dateUpdated": "2025-11-03T19:37:27.124Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
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        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "affected": [
          {
            "defaultStatus": "unknown",
            "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
            "vendor": "Siemens",
            "versions": [
              {
                "lessThan": "*",
                "status": "affected",
                "version": "0",
                "versionType": "custom"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-12T12:03:51.222Z",
          "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
          "shortName": "siemens-SADP"
        },
        "references": [
          {
            "url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html"
          }
        ],
        "x_adpType": "supplier"
      }
    ],
    "cna": {
      "affected": [
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          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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              "status": "affected",
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            },
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              "version": "7f4f03c4a1e9a4b9679feafe7625a780864a4e76",
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            {
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              "versionType": "semver"
            },
            {
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              "status": "affected",
              "version": "3.14.63",
              "versionType": "semver"
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          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "block/partitions/mac.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.4"
            },
            {
              "lessThan": "4.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.291",
              "versionType": "semver"
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            {
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              "version": "5.10.235",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "5.15.179",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.129",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.79",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.13.*",
              "status": "unaffected",
              "version": "6.13.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.14",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
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                  "versionEndExcluding": "5.4.291",
                  "versionStartIncluding": "4.4",
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                {
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              ],
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          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npartitions: mac: fix handling of bogus partition table\n\nFix several issues in partition probing:\n\n - The bailout for a bad partoffset must use put_dev_sector(), since the\n   preceding read_part_sector() succeeded.\n - If the partition table claims a silly sector size like 0xfff bytes\n   (which results in partition table entries straddling sector boundaries),\n   bail out instead of accessing out-of-bounds memory.\n - We must not assume that the partition table contains proper NUL\n   termination - use strnlen() and strncmp() instead of strlen() and\n   strcmp()."
        }
      ],
      "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 parser is driven by on-disk data, reached only by presenting a crafted block device locally \u2014 via loop attach, hotplug/media-change rescan, or BLKRRPART \u2014 with no network-facing path. Physical media insertion is one route, but the loop-device path makes plain local access sufficient, which is the broader and more severe vector.\nAC:L - The attacker fully controls `block_size` and every partition-entry offset in the image, so the straddling out-of-bounds access is deterministic on every probe \u2014 no race, no unknown memory state, no retry needed. CONFIG_MAC_PARTITION is enabled by default in mainstream distro kernels, so no rare configuration is required.\nPR:L - `loop_configure()`/`LOOP_SET_FD` with LO_FLAGS_PARTSCAN performs no capability check \u2014 an unprivileged user holding an open fd on a loop device can bind an arbitrary crafted image file and force the scan. Container, appliance, and sandbox deployments routinely expose loop or removable block devices to non-root users.\nUI:N - The attacker supplies and attaches the malicious image itself and triggers the partition rescan directly; no victim needs to mount, open, or otherwise interact with anything. Hotplug scanning likewise runs automatically at add_disk() with no user action.\nS:U - The out-of-bounds read and write stay within the kernel\u0027s own address space and are handled by the same security authority that owns the block layer. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - Up to 135 bytes of kernel memory past the end of a page-cache folio are read, and those bytes are propagated into partition start/size values that are exposed world-readable through /proc/partitions and sysfs, giving a repeatable kernel-heap disclosure primitive. The read is not narrowly bounded and the attacker chooses the exact offset past the page via secsize and slot.\nI:H - On CONFIG_PPC_PMAC (where MAC_PARTITION is default-y) mac_fix_string() writes NUL bytes into memory beyond the folio at an attacker-chosen offset, an out-of-bounds write into adjacent kernel heap. Kernel partition state is additionally constructed from out-of-bounds memory contents.\nA:H - Reading and writing past the end of a page-cache folio can fault or corrupt adjacent kernel structures, producing an oops or panic (and an immediate KASAN-detected fault on hardened kernels). The missing put_dev_sector() also leaks a folio reference on every bogus-partoffset probe, permanently pinning page-cache pages under repeated triggering."
            }
          ]
        }
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      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:54:20.631Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/a3e77da9f843e4ab93917d30c314f0283e28c124"
        },
        {
          "url": "https://git.kernel.org/stable/c/213ba5bd81b7e97ac6e6190b8f3bc6ba76123625"
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        },
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          "url": "https://git.kernel.org/stable/c/92527100be38ede924768f4277450dfe8a40e16b"
        },
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        },
        {
          "url": "https://git.kernel.org/stable/c/7fa9706722882f634090bfc9af642bf9ed719e27"
        },
        {
          "url": "https://git.kernel.org/stable/c/80e648042e512d5a767da251d44132553fe04ae0"
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      ],
      "title": "partitions: mac: fix handling of bogus partition table",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-21772",
    "datePublished": "2025-02-27T02:18:19.528Z",
    "dateReserved": "2024-12-29T08:45:45.762Z",
    "dateUpdated": "2026-08-05T11:54:20.631Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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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.

Action not permitted

FKIE_CVE-2025-21772

CVE-2025-21772 (GCVE-0-2025-21772)

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Sightings

Nomenclature

Related by attack behaviour