CVE-2025-71135 (GCVE-0-2025-71135)

Vulnerability from cvelistv5 – Published: 2026-01-14 15:07 – Updated: 2026-11-05 21:23
VLAI
Title
md/raid5: fix possible null-pointer dereferences in raid5_store_group_thread_cnt()
Summary
In the Linux kernel, the following vulnerability has been resolved: md/raid5: fix possible null-pointer dereferences in raid5_store_group_thread_cnt() The variable mddev->private is first assigned to conf and then checked: conf = mddev->private; if (!conf) ... If conf is NULL, then mddev->private is also NULL. In this case, null-pointer dereferences can occur when calling raid5_quiesce(): raid5_quiesce(mddev, true); raid5_quiesce(mddev, false); since mddev->private is assigned to conf again in raid5_quiesce(), and conf is dereferenced in several places, for example: conf->quiesce = 0; wake_up(&conf->wait_for_quiescent); To fix this issue, the function should unlock mddev and return before invoking raid5_quiesce() when conf is NULL, following the existing pattern in raid5_change_consistency_policy().
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-05 21:14 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6651 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: be19e6e4339d1579d5f2fae8ce4facf9521dbbfc , < 20597b7229aea8b5bc45cd92097640257c7fc33b (git)
Affected: fa1944bbe6220eb929e2c02e5e8706b908565711 , < e5abb6af905de6b2fead8a0b3f32ab0b81468a01 (git)
Affected: fa1944bbe6220eb929e2c02e5e8706b908565711 , < 7ad6ef91d8745d04aff9cce7bdbc6320d8e05fe9 (git)
Affected: 6.12.4 , < 6.12.64 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 6.13
Unaffected: 0 , < 6.13 (semver)
Unaffected: 6.12.64 , ≤ 6.12.* (semver)
Unaffected: 6.18.4 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.12.64",
                      "versionStartIncluding": "6.12.4",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.18.4",
                      "versionStartIncluding": "6.13",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.19",
                      "versionStartIncluding": "6.13",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid5: fix possible null-pointer dereferences in raid5_store_group_thread_cnt()\n\nThe variable mddev-\u003eprivate is first assigned to conf and then checked:\n\n  conf = mddev-\u003eprivate;\n  if (!conf) ...\n\nIf conf is NULL, then mddev-\u003eprivate is also NULL. In this case,\nnull-pointer dereferences can occur when calling raid5_quiesce():\n\n  raid5_quiesce(mddev, true);\n  raid5_quiesce(mddev, false);\n\nsince mddev-\u003eprivate is assigned to conf again in raid5_quiesce(), and conf\nis dereferenced in several places, for example:\n\n  conf-\u003equiesce = 0;\n  wake_up(\u0026conf-\u003ewait_for_quiescent);\n\nTo fix this issue, the function should unlock mddev and return before\ninvoking raid5_quiesce() when conf is NULL, following the existing pattern\nin raid5_change_consistency_policy()."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-05-23T16:03:18.862Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/20597b7229aea8b5bc45cd92097640257c7fc33b"
            },
            {
              "url": "https://git.kernel.org/stable/c/e5abb6af905de6b2fead8a0b3f32ab0b81468a01"
            },
            {
              "url": "https://git.kernel.org/stable/c/7ad6ef91d8745d04aff9cce7bdbc6320d8e05fe9"
            }
          ],
          "title": "md/raid5: fix possible null-pointer dereferences in raid5_store_group_thread_cnt()",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2025-71135",
        "datePublished": "2026-01-14T15:07:49.891Z",
        "dateReserved": "2026-01-13T15:30:19.656Z",
        "dateUpdated": "2026-11-05T21:23:09.152Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Sightings

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Nomenclature

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