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CVE-2025-21856 (GCVE-0-2025-21856)

Vulnerability from cvelistv5 – Published: 2025-03-12 09:42 – Updated: 2026-05-11 21:07
VLAI
Title
s390/ism: add release function for struct device
Summary
In the Linux kernel, the following vulnerability has been resolved: s390/ism: add release function for struct device According to device_release() in /drivers/base/core.c, a device without a release function is a broken device and must be fixed. The current code directly frees the device after calling device_add() without waiting for other kernel parts to release their references. Thus, a reference could still be held to a struct device, e.g., by sysfs, leading to potential use-after-free issues if a proper release function is not set.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-01 19:25 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 8c81ba20349daf9f7e58bb05a0c12f4b71813a30 , < 940d15254d2216b585558bcf36312da50074e711 (git)
Affected: 8c81ba20349daf9f7e58bb05a0c12f4b71813a30 , < 0505ff2936f166405d81d0d454a81d9c14124344 (git)
Affected: 8c81ba20349daf9f7e58bb05a0c12f4b71813a30 , < e26e8ac27351f457091459a0a355bacd06d5bb2b (git)
Affected: 8c81ba20349daf9f7e58bb05a0c12f4b71813a30 , < 915e34d5ad35a6a9e56113f852ade4a730fb88f0 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.3
Unaffected: 0 , < 6.3 (semver)
Unaffected: 6.6.80 , ≤ 6.6.* (semver)
Unaffected: 6.12.17 , ≤ 6.12.* (semver)
Unaffected: 6.13.5 , ≤ 6.13.* (semver)
Unaffected: 6.14 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.8, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-21856\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-10-01T19:25:59.490091Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416 Use After Free\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-10-01T16:58:25.756Z\"}}], \"cna\": {\"title\": \"s390/ism: add release function for struct device\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"8c81ba20349daf9f7e58bb05a0c12f4b71813a30\", \"lessThan\": \"940d15254d2216b585558bcf36312da50074e711\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8c81ba20349daf9f7e58bb05a0c12f4b71813a30\", \"lessThan\": \"0505ff2936f166405d81d0d454a81d9c14124344\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8c81ba20349daf9f7e58bb05a0c12f4b71813a30\", \"lessThan\": \"e26e8ac27351f457091459a0a355bacd06d5bb2b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8c81ba20349daf9f7e58bb05a0c12f4b71813a30\", \"lessThan\": \"915e34d5ad35a6a9e56113f852ade4a730fb88f0\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/s390/net/ism_drv.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.3\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.3\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.6.80\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.17\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.13.5\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.13.*\"}, {\"status\": \"unaffected\", \"version\": \"6.14\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/s390/net/ism_drv.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/940d15254d2216b585558bcf36312da50074e711\"}, {\"url\": \"https://git.kernel.org/stable/c/0505ff2936f166405d81d0d454a81d9c14124344\"}, {\"url\": \"https://git.kernel.org/stable/c/e26e8ac27351f457091459a0a355bacd06d5bb2b\"}, {\"url\": \"https://git.kernel.org/stable/c/915e34d5ad35a6a9e56113f852ade4a730fb88f0\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ns390/ism: add release function for struct device\\n\\nAccording to device_release() in /drivers/base/core.c,\\na device without a release function is a broken device\\nand must be fixed.\\n\\nThe current code directly frees the device after calling device_add()\\nwithout waiting for other kernel parts to release their references.\\nThus, a reference could still be held to a struct device,\\ne.g., by sysfs, leading to potential use-after-free\\nissues if a proper release function is not set.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.80\", \"versionStartIncluding\": \"6.3\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.17\", \"versionStartIncluding\": \"6.3\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.13.5\", \"versionStartIncluding\": \"6.3\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.14\", \"versionStartIncluding\": \"6.3\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T21:07:49.863Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-21856\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T21:07:49.863Z\", \"dateReserved\": \"2024-12-29T08:45:45.780Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-03-12T09:42:09.929Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.