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CVE-2025-22036 (GCVE-0-2025-22036)

Vulnerability from cvelistv5 – Published: 2025-04-16 14:11 – Updated: 2026-08-05 11:56
VLAI
Title
exfat: fix random stack corruption after get_block
Summary
In the Linux kernel, the following vulnerability has been resolved: exfat: fix random stack corruption after get_block When get_block is called with a buffer_head allocated on the stack, such as do_mpage_readpage, stack corruption due to buffer_head UAF may occur in the following race condition situation. <CPU 0> <CPU 1> mpage_read_folio <<bh on stack>> do_mpage_readpage exfat_get_block bh_read __bh_read get_bh(bh) submit_bh wait_on_buffer ... end_buffer_read_sync __end_buffer_read_notouch unlock_buffer <<keep going>> ... ... ... ... <<bh is not valid out of mpage_read_folio>> . . another_function <<variable A on stack>> put_bh(bh) atomic_dec(bh->b_count) * stack corruption here * This patch returns -EAGAIN if a folio does not have buffers when bh_read needs to be called. By doing this, the caller can fallback to functions like block_read_full_folio(), create a buffer_head in the folio, and then call get_block again. Let's do not call bh_read() with on-stack buffer_head.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-01 17:04 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 11a347fb6cef62ce47e84b97c45f2b2497c7593b , < 49b0a6ab8e528a0c1c50e37cef9b9c7c121365f2 (git)
Affected: 11a347fb6cef62ce47e84b97c45f2b2497c7593b , < f7447286363dc1e410bf30b87d75168f3519f9cc (git)
Affected: 11a347fb6cef62ce47e84b97c45f2b2497c7593b , < f807a6bf2005740fa26b4f59c4a003dc966b9afd (git)
Affected: 11a347fb6cef62ce47e84b97c45f2b2497c7593b , < 1bb7ff4204b6d4927e982cd256286c09ed4fd8ca (git)
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Linux Linux Affected: 6.8
Unaffected: 0 , < 6.8 (semver)
Unaffected: 6.12.23 , ≤ 6.12.* (semver)
Unaffected: 6.13.11 , ≤ 6.13.* (semver)
Unaffected: 6.14.2 , ≤ 6.14.* (semver)
Unaffected: 6.15 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: exfat: corrige la corrupci\u00f3n de pila aleatoria despu\u00e9s de get_block Cuando se llama a get_block con un buffer_head asignado en la pila, como do_mpage_readpage, puede ocurrir una corrupci\u00f3n de pila debido a buffer_head UAF en la siguiente situaci\u00f3n de condici\u00f3n de ejecuci\u00f3n.   mpage_read_folio \u0026lt;\u0026gt; do_mpage_readpage exfat_get_block bh_read __bh_read get_bh(bh) submit_bh wait_on_buffer ... end_buffer_read_sync __end_buffer_read_notouch unlock_buffer \u0026lt;\u0026gt; ... ... ... ... \u0026lt;\u0026gt; . . another_function \u0026lt;\u0026gt; put_bh(bh) atomic_dec(bh-\u0026gt;b_count) * Corrupci\u00f3n de pila aqu\u00ed * Este parche devuelve -EAGAIN si un folio no tiene b\u00faferes cuando se necesita llamar a bh_read. De esta manera, quien lo llama puede recurrir a funciones como block_read_full_folio(), crear un buffer_head en el folio y luego volver a llamar a get_block. No llamemos a bh_read() con buffer_head en la pila."
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              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/f7447286363dc1e410bf30b87d75168f3519f9cc"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/f807a6bf2005740fa26b4f59c4a003dc966b9afd"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-362"
              },
              {
                "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"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-30T09:37:20+00:00",
      "cve": "CVE-2025-22036",
      "id": "CVE-2025-22036",
      "initial_release_date": "2025-04-16T00:00:00+00:00",
      "product_status:fixed": "307",
      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: exfat: fix random stack corruption after get_block",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-22036.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-12T16:52:03Z",
      "cve": "CVE-2025-22036",
      "id": "CVE-2025-22036",
      "initial_release_date": "2025-04-18T23:20:29Z",
      "product_status:known_affected": "410",
      "product_status:known_not_affected": "411",
      "product_status:recommended": "384",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-22036",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-22036.json",
      "version": "40"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "cvssV3_1": {
                  "attackComplexity": "HIGH",
                  "attackVector": "LOCAL",
                  "availabilityImpact": "HIGH",
                  "baseScore": 7,
                  "baseSeverity": "HIGH",
                  "confidentialityImpact": "HIGH",
                  "integrityImpact": "HIGH",
                  "privilegesRequired": "LOW",
                  "scope": "UNCHANGED",
                  "userInteraction": "NONE",
                  "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "version": "3.1"
                }
              },
              {
                "other": {
                  "content": {
                    "id": "CVE-2025-22036",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2025-10-01T17:04:29.794256Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "problemTypes": [
              {
                "descriptions": [
                  {
                    "cweId": "CWE-416",
                    "description": "CWE-416 Use After Free",
                    "lang": "en",
                    "type": "CWE"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2025-10-01T14:40:31.488Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "fs/exfat/inode.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "49b0a6ab8e528a0c1c50e37cef9b9c7c121365f2",
                  "status": "affected",
                  "version": "11a347fb6cef62ce47e84b97c45f2b2497c7593b",
                  "versionType": "git"
                },
                {
                  "lessThan": "f7447286363dc1e410bf30b87d75168f3519f9cc",
                  "status": "affected",
                  "version": "11a347fb6cef62ce47e84b97c45f2b2497c7593b",
                  "versionType": "git"
                },
                {
                  "lessThan": "f807a6bf2005740fa26b4f59c4a003dc966b9afd",
                  "status": "affected",
                  "version": "11a347fb6cef62ce47e84b97c45f2b2497c7593b",
                  "versionType": "git"
                },
                {
                  "lessThan": "1bb7ff4204b6d4927e982cd256286c09ed4fd8ca",
                  "status": "affected",
                  "version": "11a347fb6cef62ce47e84b97c45f2b2497c7593b",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "fs/exfat/inode.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "6.8"
                },
                {
                  "lessThan": "6.8",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.12.*",
                  "status": "unaffected",
                  "version": "6.12.23",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.13.*",
                  "status": "unaffected",
                  "version": "6.13.11",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.14.*",
                  "status": "unaffected",
                  "version": "6.14.2",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.15",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.12.23",
                      "versionStartIncluding": "6.8",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.13.11",
                      "versionStartIncluding": "6.8",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.14.2",
                      "versionStartIncluding": "6.8",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.15",
                      "versionStartIncluding": "6.8",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nexfat: fix random stack corruption after get_block\n\nWhen get_block is called with a buffer_head allocated on the stack, such\nas do_mpage_readpage, stack corruption due to buffer_head UAF may occur in\nthe following race condition situation.\n\n     \u003cCPU 0\u003e                      \u003cCPU 1\u003e\nmpage_read_folio\n  \u003c\u003cbh on stack\u003e\u003e\n  do_mpage_readpage\n    exfat_get_block\n      bh_read\n        __bh_read\n\t  get_bh(bh)\n          submit_bh\n          wait_on_buffer\n                              ...\n                              end_buffer_read_sync\n                                __end_buffer_read_notouch\n                                   unlock_buffer\n          \u003c\u003ckeep going\u003e\u003e\n        ...\n      ...\n    ...\n  ...\n\u003c\u003cbh is not valid out of mpage_read_folio\u003e\u003e\n   .\n   .\nanother_function\n  \u003c\u003cvariable A on stack\u003e\u003e\n                                   put_bh(bh)\n                                     atomic_dec(bh-\u003eb_count)\n  * stack corruption here *\n\nThis patch returns -EAGAIN if a folio does not have buffers when bh_read\nneeds to be called. By doing this, the caller can fallback to functions\nlike block_read_full_folio(), create a buffer_head in the folio, and then\ncall get_block again.\n\nLet\u0027s do not call bh_read() with on-stack buffer_head."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-05-26T05:17:05.028Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/49b0a6ab8e528a0c1c50e37cef9b9c7c121365f2"
            },
            {
              "url": "https://git.kernel.org/stable/c/f7447286363dc1e410bf30b87d75168f3519f9cc"
            },
            {
              "url": "https://git.kernel.org/stable/c/f807a6bf2005740fa26b4f59c4a003dc966b9afd"
            },
            {
              "url": "https://git.kernel.org/stable/c/1bb7ff4204b6d4927e982cd256286c09ed4fd8ca"
            }
          ],
          "title": "exfat: fix random stack corruption after get_block",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2025-22036",
        "datePublished": "2025-04-16T14:11:54.916Z",
        "dateReserved": "2024-12-29T08:45:45.809Z",
        "dateUpdated": "2025-10-01T17:04:32.804Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • 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.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

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.