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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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          "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."
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    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38445\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-07-25T16:15:29.980\",\"lastModified\":\"2026-06-17T09:16:52.257\",\"vulnStatus\":\"Analyzed\",\"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-\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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/md/raid1.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"afeee514ce7f4cab605beedd03be71ebaf0c5fc8\",\"lessThan\":\"d8a6853d00fbaa810765c8ed2f452a5832273968\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"afeee514ce7f4cab605beedd03be71ebaf0c5fc8\",\"lessThan\":\"12b00ec99624f8da8c325f2dd6e807df26df0025\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"afeee514ce7f4cab605beedd03be71ebaf0c5fc8\",\"lessThan\":\"48da050b4f54ed639b66278d0ae6f4107b2c4e2d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"afeee514ce7f4cab605beedd03be71ebaf0c5fc8\",\"lessThan\":\"5f35e48b76655e45522df338876dfef88dafcc71\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"afeee514ce7f4cab605beedd03be71ebaf0c5fc8\",\"lessThan\":\"df5894014a92ff0196dbc212a7764e97366fd2b7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"afeee514ce7f4cab605beedd03be71ebaf0c5fc8\",\"lessThan\":\"776e6186dc9ecbdb8a1b706e989166c8a99bbf64\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"afeee514ce7f4cab605beedd03be71ebaf0c5fc8\",\"lessThan\":\"61fd5e93006cf82ec8ee5c115ab5cf4bbd104bdb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"afeee514ce7f4cab605beedd03be71ebaf0c5fc8\",\"lessThan\":\"d67ed2ccd2d1dcfda9292c0ea8697a9d0f2f0d98\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/md/raid1.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.18\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.18\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.296\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.240\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.189\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.146\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.99\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.39\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.15.7\",\"lessThanOrEqual\":\"6.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.16\",\"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:H/I:N/A:H\",\"baseScore\":7.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.2}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-125\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.18\",\"versionEndExcluding\":\"5.4.296\",\"matchCriteriaId\":\"08A2BFF3-E868-4308-8701-142A657FA31D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.240\",\"matchCriteriaId\":\"0E73A49A-F9B2-470F-91B2-6FAB6239BDB6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.189\",\"matchCriteriaId\":\"3CE0FB9A-DBE8-48B6-BF6E-3C724A4991E3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.146\",\"matchCriteriaId\":\"D8DA1166-5C95-475E-BF65-1DF621968E96\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.99\",\"matchCriteriaId\":\"B369699C-E0E6-42A4-BDEE-8E676ECEF6AA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.39\",\"matchCriteriaId\":\"18D57670-11F8-4B5A-AD56-EA32DD0F44E1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.15.7\",\"matchCriteriaId\":\"F9C46937-5FA9-4335-AD7B-E7FC29453CE1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.16:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"6D4894DB-CCFE-4602-B1BF-3960B2E19A01\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.16:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"09709862-E348-4378-8632-5A7813EDDC86\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.16:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"415BF58A-8197-43F5-B3D7-D1D63057A26E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.16:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"A0517869-312D-4429-80C2-561086E1421C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.16:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"85421F4E-C863-4ABF-B4B4-E887CC2F7F92\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"FA6FEEC2-9F11-4643-8827-749718254FED\"}]}]}],\"references\":[{\"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\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"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\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]}]}}",
    "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"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-11T02:00:56Z",
      "cve": "CVE-2025-38445",
      "id": "CVE-2025-38445",
      "initial_release_date": "2025-07-29T23:23:28Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "676",
      "product_status:known_not_affected": "187",
      "product_status:recommended": "472",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-38445",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-38445.json",
      "version": "60"
    }
  }
}



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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.