GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

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

Vulnerability from cvelistv5 – Published: 2026-01-14 15:07 – Updated: 2026-05-23 16:03
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
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
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.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/raid5.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "20597b7229aea8b5bc45cd92097640257c7fc33b",
              "status": "affected",
              "version": "be19e6e4339d1579d5f2fae8ce4facf9521dbbfc",
              "versionType": "git"
            },
            {
              "lessThan": "e5abb6af905de6b2fead8a0b3f32ab0b81468a01",
              "status": "affected",
              "version": "fa1944bbe6220eb929e2c02e5e8706b908565711",
              "versionType": "git"
            },
            {
              "lessThan": "7ad6ef91d8745d04aff9cce7bdbc6320d8e05fe9",
              "status": "affected",
              "version": "fa1944bbe6220eb929e2c02e5e8706b908565711",
              "versionType": "git"
            },
            {
              "lessThan": "6.12.64",
              "status": "affected",
              "version": "6.12.4",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/raid5.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.13"
            },
            {
              "lessThan": "6.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.64",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "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": "2026-05-23T16:03:18.862Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-71135",
      "date": "2026-09-16",
      "epss": "0.00172",
      "percentile": "0.06867"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-71135\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-01-14T15:16:03.277\",\"lastModified\":\"2026-06-17T10:03:44.170\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"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().\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\\n\\nmd/raid5: corrige posibles desreferencias de puntero nulo en raid5_store_group_thread_cnt()\\n\\nLa variable mddev-\u0026gt;private se asigna primero a conf y luego se comprueba:\\n\\n  conf = mddev-\u0026gt;private;\\n  if (!conf) ...\\n\\nSi conf es NULL, entonces mddev-\u0026gt;private tambi\u00e9n es NULL. En este caso,\\npueden ocurrir desreferencias de puntero nulo al llamar a raid5_quiesce():\\n\\n  raid5_quiesce(mddev, true);\\n  raid5_quiesce(mddev, false);\\n\\nya que mddev-\u0026gt;private se asigna a conf de nuevo en raid5_quiesce(), y conf\\nse desreferencia en varios lugares, por ejemplo:\\n\\n  conf-\u0026gt;quiesce = 0;\\n  wake_up(\u0026amp;conf-\u0026gt;wait_for_quiescent);\\n\\nPara solucionar este problema, la funci\u00f3n deber\u00eda desbloquear mddev y retornar antes de\\ninvocar raid5_quiesce() cuando conf es NULL, siguiendo el patr\u00f3n existente\\nen raid5_change_consistency_policy().\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/md/raid5.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"be19e6e4339d1579d5f2fae8ce4facf9521dbbfc\",\"lessThan\":\"20597b7229aea8b5bc45cd92097640257c7fc33b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"fa1944bbe6220eb929e2c02e5e8706b908565711\",\"lessThan\":\"e5abb6af905de6b2fead8a0b3f32ab0b81468a01\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"fa1944bbe6220eb929e2c02e5e8706b908565711\",\"lessThan\":\"7ad6ef91d8745d04aff9cce7bdbc6320d8e05fe9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6.12.4\",\"lessThan\":\"6.12.64\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/md/raid5.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.13\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.13\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.64\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.4\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.19\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.12.4\",\"versionEndExcluding\":\"6.12.64\",\"matchCriteriaId\":\"83E69705-B66F-47BA-A2AE-39F4F6BFA244\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13.1\",\"versionEndExcluding\":\"6.18.4\",\"matchCriteriaId\":\"CBCED124-82AE-4EDB-9676-27C3B654451E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.13:-:*:*:*:*:*:*\",\"matchCriteriaId\":\"5A3F9505-6B98-4269-8B81-127E55A1BF00\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"17B67AA7-40D6-4AFA-8459-F200F3D7CFD1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"C47E4CC9-C826-4FA9-B014-7FE3D9B318B2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"F71D92C0-C023-48BD-B3B6-70B638EEE298\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"13580667-0A98-40CC-B29F-D12790B91BDB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"CAD1FED7-CF48-47BF-AC7D-7B6FA3C065FC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"3EF854A1-ABB1-4E93-BE9A-44569EC76C0D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc7:*:*:*:*:*:*\",\"matchCriteriaId\":\"F5DC0CA6-F0AF-4DDF-A882-3DADB9A886A7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc8:*:*:*:*:*:*\",\"matchCriteriaId\":\"EB5B7DFC-C36B-45D8-922C-877569FDDF43\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/20597b7229aea8b5bc45cd92097640257c7fc33b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7ad6ef91d8745d04aff9cce7bdbc6320d8e05fe9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e5abb6af905de6b2fead8a0b3f32ab0b81468a01\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T07:12:45+00:00",
      "cve": "CVE-2025-71135",
      "id": "CVE-2025-71135",
      "initial_release_date": "2025-01-01T00:00:00+00:00",
      "product_status:known_affected": "246",
      "product_status:known_not_affected": "28",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: md/raid5: fix possible null-pointer dereferences in raid5_store_group_thread_cnt()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-71135.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-12T16:43:59Z",
      "cve": "CVE-2025-71135",
      "id": "CVE-2025-71135",
      "initial_release_date": "2026-01-17T00:25:50Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "446",
      "product_status:known_not_affected": "312",
      "product_status:recommended": "289",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-71135",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-71135.json",
      "version": "33"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.