CVE-2025-38445

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oldpool;\n\t// initialize newpool.wait.head to stack address\n\tmempool_init(&newpool, ...);\n\tconf->r1bio_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->alloc fails\n\t\t\tremove_element()\n\t\t\t{\n\t\t\t\t--pool->curr_nr;\n\t\t\t}\n\t\t}\n\t}\n}\n\nmempool_free()\n{\n\tif (pool->curr_nr < pool->min_nr) {\n\t\t// pool->wait.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(&pool->wait);\n\t}\n}\n\nFix:\nreinit conf->r1bio_pool.wait after assigning newpool."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/md/raid1.c"], "versions": [{"version": "afeee514ce7f4cab605beedd03be71ebaf0c5fc8", "lessThan": "d8a6853d00fbaa810765c8ed2f452a5832273968", "status": 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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->alloc fails\n\t\t\tremove_element()\n\t\t\t{\n\t\t\t\t--pool->curr_nr;\n\t\t\t}\n\t\t}\n\t}\n}\n\nmempool_free()\n{\n\tif (pool->curr_nr < pool->min_nr) {\n\t\t// pool->wait.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(&pool->wait);\n\t}\n}\n\nFix:\nreinit conf->r1bio_pool.wait after assigning newpool."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.4.296", "versionStartIncluding": "4.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.240", "versionStartIncluding": "4.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, 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"OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*", "matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"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->r1bio_pool.\nThis results in conf->r1bio_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(&newpool, ...);\n\tconf->r1bio_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->alloc fails\n\t\t\tremove_element()\n\t\t\t{\n\t\t\t\t--pool->curr_nr;\n\t\t\t}\n\t\t}\n\t}\n}\n\nmempool_free()\n{\n\tif (pool->curr_nr < pool->min_nr) {\n\t\t// pool->wait.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(&pool->wait);\n\t}\n}\n\nFix:\nreinit conf->r1bio_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-&gt;r1bio_pool. Esto da como resultado que conf-&gt;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(&amp;newpool, ...); conf-&gt;r1bio_pool = newpool; } raid1_read_request() o raid1_write_request() { alloc_r1bio() { mempool_alloc() { // si pool-&gt;alloc falla remove_element() { --pool-&gt;curr_nr; } } } } mempool_free() { if (pool-&gt;curr_nr &lt; pool-&gt;min_nr) { // pool-&gt;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(&amp;pool-&gt;wait); } } Soluci\u00f3n: reinicie conf-&gt;r1bio_pool.wait despu\u00e9s de asignar newpool."}], "id": "CVE-2025-38445", "lastModified": "2026-11-05T21:18:32.113", "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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-38445", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-05T20:56:58.658321Z", "version": "2.0.3"}}]}, "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"}]}

{"bugzilla": {"description": "kernel: md/raid1: Fix stack memory use after return in raid1_reshape", "id": "2383499", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2383499"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nmd/raid1: Fix stack memory use after return in raid1_reshape\nIn the raid1_reshape function, newpool is\nallocated on the stack and assigned to conf->r1bio_pool.\nThis results in conf->r1bio_pool.wait.head pointing\nto a stack address.\nAccessing this address later can lead to a kernel panic.\nExample access path:\nraid1_reshape()\n{\n// newpool is on the stack\nmempool_t newpool, oldpool;\n// initialize newpool.wait.head to stack address\nmempool_init(&newpool, ...);\nconf->r1bio_pool = newpool;\n}\nraid1_read_request() or raid1_write_request()\n{\nalloc_r1bio()\n{\nmempool_alloc()\n{\n// if pool->alloc fails\nremove_element()\n{\n--pool->curr_nr;\n}\n}\n}\n}\nmempool_free()\n{\nif (pool->curr_nr < pool->min_nr) {\n// pool->wait.head is a stack address\n// wake_up() will try to access this invalid address\n// which leads to a kernel panic\nreturn;\nwake_up(&pool->wait);\n}\n}\nFix:\nreinit conf->r1bio_pool.wait after assigning newpool."], "name": "CVE-2025-38445", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-07-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-38445\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-38445\nhttps://lore.kernel.org/linux-cve-announce/2025072503-CVE-2025-38445-7295@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-07-26T11:22:08.133198+00:00", "updated": "2025-07-26T11:22:08.133251+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}