CVE-2025-38445 (GCVE-0-2025-38445)

Vulnerability from cvelistv5 – Published: 2025-07-25 15:27 – Updated: 2026-05-11 21:28
VLAI
Title
md/raid1: Fix stack memory use after return in raid1_reshape
Summary
In the Linux kernel, the following vulnerability has been resolved: md/raid1: Fix stack memory use after return in raid1_reshape In the raid1_reshape function, newpool is allocated on the stack and assigned to conf->r1bio_pool. This results in conf->r1bio_pool.wait.head pointing to a stack address. Accessing this address later can lead to a kernel panic. Example access path: raid1_reshape() { // newpool is on the stack mempool_t newpool, oldpool; // initialize newpool.wait.head to stack address mempool_init(&newpool, ...); conf->r1bio_pool = newpool; } raid1_read_request() or raid1_write_request() { alloc_r1bio() { mempool_alloc() { // if pool->alloc fails remove_element() { --pool->curr_nr; } } } } mempool_free() { if (pool->curr_nr < pool->min_nr) { // pool->wait.head is a stack address // wake_up() will try to access this invalid address // which leads to a kernel panic return; wake_up(&pool->wait); } } Fix: reinit conf->r1bio_pool.wait after assigning newpool.
Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: afeee514ce7f4cab605beedd03be71ebaf0c5fc8 , < d8a6853d00fbaa810765c8ed2f452a5832273968 (git)
Affected: afeee514ce7f4cab605beedd03be71ebaf0c5fc8 , < 12b00ec99624f8da8c325f2dd6e807df26df0025 (git)
Affected: afeee514ce7f4cab605beedd03be71ebaf0c5fc8 , < 48da050b4f54ed639b66278d0ae6f4107b2c4e2d (git)
Affected: afeee514ce7f4cab605beedd03be71ebaf0c5fc8 , < 5f35e48b76655e45522df338876dfef88dafcc71 (git)
Affected: afeee514ce7f4cab605beedd03be71ebaf0c5fc8 , < df5894014a92ff0196dbc212a7764e97366fd2b7 (git)
Affected: afeee514ce7f4cab605beedd03be71ebaf0c5fc8 , < 776e6186dc9ecbdb8a1b706e989166c8a99bbf64 (git)
Affected: afeee514ce7f4cab605beedd03be71ebaf0c5fc8 , < 61fd5e93006cf82ec8ee5c115ab5cf4bbd104bdb (git)
Affected: afeee514ce7f4cab605beedd03be71ebaf0c5fc8 , < d67ed2ccd2d1dcfda9292c0ea8697a9d0f2f0d98 (git)
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Linux Linux Affected: 4.18
Unaffected: 0 , < 4.18 (semver)
Unaffected: 5.4.296 , ≤ 5.4.* (semver)
Unaffected: 5.10.240 , ≤ 5.10.* (semver)
Unaffected: 5.15.189 , ≤ 5.15.* (semver)
Unaffected: 6.1.146 , ≤ 6.1.* (semver)
Unaffected: 6.6.99 , ≤ 6.6.* (semver)
Unaffected: 6.12.39 , ≤ 6.12.* (semver)
Unaffected: 6.15.7 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
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          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid1: Fix stack memory use after return in raid1_reshape\n\nIn the raid1_reshape function, newpool is\nallocated on the stack and assigned to conf-\u003er1bio_pool.\nThis results in conf-\u003er1bio_pool.wait.head pointing\nto a stack address.\nAccessing this address later can lead to a kernel panic.\n\nExample access path:\n\nraid1_reshape()\n{\n\t// newpool is on the stack\n\tmempool_t newpool, oldpool;\n\t// initialize newpool.wait.head to stack address\n\tmempool_init(\u0026newpool, ...);\n\tconf-\u003er1bio_pool = newpool;\n}\n\nraid1_read_request() or raid1_write_request()\n{\n\talloc_r1bio()\n\t{\n\t\tmempool_alloc()\n\t\t{\n\t\t\t// if pool-\u003ealloc fails\n\t\t\tremove_element()\n\t\t\t{\n\t\t\t\t--pool-\u003ecurr_nr;\n\t\t\t}\n\t\t}\n\t}\n}\n\nmempool_free()\n{\n\tif (pool-\u003ecurr_nr \u003c pool-\u003emin_nr) {\n\t\t// pool-\u003ewait.head is a stack address\n\t\t// wake_up() will try to access this invalid address\n\t\t// which leads to a kernel panic\n\t\treturn;\n\t\twake_up(\u0026pool-\u003ewait);\n\t}\n}\n\nFix:\nreinit conf-\u003er1bio_pool.wait after assigning newpool."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: md/raid1: Corregir el uso de memoria de la pila despu\u00e9s del retorno en raid1_reshape En la funci\u00f3n raid1_reshape, newpool se asigna en la pila y a conf-\u0026gt;r1bio_pool. Esto da como resultado que conf-\u0026gt;r1bio_pool.wait.head apunte a una direcci\u00f3n de pila. Acceder a esta direcci\u00f3n m\u00e1s tarde puede provocar un p\u00e1nico del kernel. Ejemplo de ruta de acceso: raid1_reshape() { // newpool est\u00e1 en la pila mempool_t newpool, oldpool; // inicializar newpool.wait.head en la direcci\u00f3n de la pila mempool_init(\u0026amp;newpool, ...); conf-\u0026gt;r1bio_pool = newpool; } raid1_read_request() o raid1_write_request() { alloc_r1bio() { mempool_alloc() { // si pool-\u0026gt;alloc falla remove_element() { --pool-\u0026gt;curr_nr; } } } } mempool_free() { if (pool-\u0026gt;curr_nr \u0026lt; pool-\u0026gt;min_nr) { // pool-\u0026gt;wait.head es una direcci\u00f3n de pila // wake_up() intentar\u00e1 acceder a esta direcci\u00f3n no v\u00e1lida // lo que genera un p\u00e1nico del kernel return; wake_up(\u0026amp;pool-\u0026gt;wait); } } Soluci\u00f3n: reinicie conf-\u0026gt;r1bio_pool.wait despu\u00e9s de asignar newpool."
          }
        ],
        "id": "CVE-2025-38445",
        "lastModified": "2026-06-17T09:16:52.257",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.1,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.2,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2025-07-25T16:15:29.980",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/12b00ec99624f8da8c325f2dd6e807df26df0025"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/48da050b4f54ed639b66278d0ae6f4107b2c4e2d"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/5f35e48b76655e45522df338876dfef88dafcc71"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/61fd5e93006cf82ec8ee5c115ab5cf4bbd104bdb"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/776e6186dc9ecbdb8a1b706e989166c8a99bbf64"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/d67ed2ccd2d1dcfda9292c0ea8697a9d0f2f0d98"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/d8a6853d00fbaa810765c8ed2f452a5832273968"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/df5894014a92ff0196dbc212a7764e97366fd2b7"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-125"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-30T01:08:24+00:00",
      "cve": "CVE-2025-38445",
      "id": "CVE-2025-38445",
      "initial_release_date": "2025-07-25T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: Denial of Service due to stack memory use-after-return in raid1_reshape",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38445.json",
      "version": "3"
    }
  }
}



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