CVE-2025-38481 (GCVE-0-2025-38481)
Vulnerability from cvelistv5 – Published: 2025-07-28 11:21 – Updated: 2026-05-11 21:28
VLAI
EPSS
VEX
Title
comedi: Fail COMEDI_INSNLIST ioctl if n_insns is too large
Summary
In the Linux kernel, the following vulnerability has been resolved:
comedi: Fail COMEDI_INSNLIST ioctl if n_insns is too large
The handling of the `COMEDI_INSNLIST` ioctl allocates a kernel buffer to
hold the array of `struct comedi_insn`, getting the length from the
`n_insns` member of the `struct comedi_insnlist` supplied by the user.
The allocation will fail with a WARNING and a stack dump if it is too
large.
Avoid that by failing with an `-EINVAL` error if the supplied `n_insns`
value is unreasonable.
Define the limit on the `n_insns` value in the `MAX_INSNS` macro. Set
this to the same value as `MAX_SAMPLES` (65536), which is the maximum
allowed sum of the values of the member `n` in the array of `struct
comedi_insn`, and sensible comedi instructions will have an `n` of at
least 1.
Severity
5.5 (Medium)
Assigner
References
10 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
ed9eccbe8970f6eedc1b978c157caf1251a896d4 , < 454d732dfd0aef7d7aa950c409215ca06d717e93
(git)
Affected: ed9eccbe8970f6eedc1b978c157caf1251a896d4 , < c68257588e87f45530235701a42496b7e9e56adb (git) Affected: ed9eccbe8970f6eedc1b978c157caf1251a896d4 , < 69dc06b9514522de532e997a21d035cd29b0db44 (git) Affected: ed9eccbe8970f6eedc1b978c157caf1251a896d4 , < d4c73ce13f5b5a0fe0319f1f352ff602f0ace8e3 (git) Affected: ed9eccbe8970f6eedc1b978c157caf1251a896d4 , < c9d3d9667443caafa804cd07940aeaef8e53aa90 (git) Affected: ed9eccbe8970f6eedc1b978c157caf1251a896d4 , < 992d600f284e719242a434166e86c1999649b71c (git) Affected: ed9eccbe8970f6eedc1b978c157caf1251a896d4 , < e3b8322cc8081d142ee4c1a43e1d702bdba1ed76 (git) Affected: ed9eccbe8970f6eedc1b978c157caf1251a896d4 , < 08ae4b20f5e82101d77326ecab9089e110f224cc (git) |
guessed | |
| Linux | Linux |
Affected:
2.6.29
Unaffected: 0 , < 2.6.29 (semver) Unaffected: 5.4.297 , ≤ 5.4.* (semver) Unaffected: 5.10.241 , ≤ 5.10.* (semver) Unaffected: 5.15.190 , ≤ 5.15.* (semver) Unaffected: 6.1.147 , ≤ 6.1.* (semver) Unaffected: 6.6.100 , ≤ 6.6.* (semver) Unaffected: 6.12.40 , ≤ 6.12.* (semver) Unaffected: 6.15.8 , ≤ 6.15.* (semver) Unaffected: 6.16 , ≤ * (original_commit_for_fix) |
guessed |
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Set\\nthis to the same value as `MAX_SAMPLES` (65536), which is the maximum\\nallowed sum of the values of the member `n` in the array of `struct\\ncomedi_insn`, and sensible comedi instructions will have an `n` of at\\nleast 1.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: comedi: Error en el ioctl COMEDI_INSNLIST si n_insns es demasiado grande El manejo del ioctl `COMEDI_INSNLIST` asigna un b\u00fafer del kernel para contener la matriz de `struct comedi_insn`, obteniendo la longitud del miembro `n_insns` de la `struct comedi_insnlist` proporcionada por el usuario. La asignaci\u00f3n fallar\u00e1 con un WARNING y un volcado de pila si es demasiado grande. Ev\u00edtelo fallando con un error `-EINVAL` si el valor `n_insns` proporcionado no es razonable. Defina el l\u00edmite en el valor `n_insns` en la macro `MAX_INSNS`. Establezca esto en el mismo valor que `MAX_SAMPLES` (65536), que es la suma m\u00e1xima permitida de los valores del miembro `n` en la matriz de `struct comedi_insn`, y las instrucciones comedi sensatas tendr\u00e1n un `n` de al menos 1.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/comedi/comedi_fops.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"ed9eccbe8970f6eedc1b978c157caf1251a896d4\",\"lessThan\":\"454d732dfd0aef7d7aa950c409215ca06d717e93\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ed9eccbe8970f6eedc1b978c157caf1251a896d4\",\"lessThan\":\"c68257588e87f45530235701a42496b7e9e56adb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ed9eccbe8970f6eedc1b978c157caf1251a896d4\",\"lessThan\":\"69dc06b9514522de532e997a21d035cd29b0db44\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ed9eccbe8970f6eedc1b978c157caf1251a896d4\",\"lessThan\":\"d4c73ce13f5b5a0fe0319f1f352ff602f0ace8e3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ed9eccbe8970f6eedc1b978c157caf1251a896d4\",\"lessThan\":\"c9d3d9667443caafa804cd07940aeaef8e53aa90\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ed9eccbe8970f6eedc1b978c157caf1251a896d4\",\"lessThan\":\"992d600f284e719242a434166e86c1999649b71c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ed9eccbe8970f6eedc1b978c157caf1251a896d4\",\"lessThan\":\"e3b8322cc8081d142ee4c1a43e1d702bdba1ed76\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ed9eccbe8970f6eedc1b978c157caf1251a896d4\",\"lessThan\":\"08ae4b20f5e82101d77326ecab9089e110f224cc\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/comedi/comedi_fops.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.29\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.29\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.297\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.241\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.190\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.147\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.100\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.40\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.15.8\",\"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: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\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"2.6.29\",\"versionEndExcluding\":\"5.4.297\",\"matchCriteriaId\":\"B9F2FDF6-4EB5-4DFF-BC93-F12605A32B6E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.241\",\"matchCriteriaId\":\"D0D21C35-EB8A-488A-BBF9-403E4817E5DD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.190\",\"matchCriteriaId\":\"AD9E597F-3DDE-4D7E-976C-463D0611F13F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.147\",\"matchCriteriaId\":\"A4FD62FC-0DAE-4ACE-8C9C-66156518C3E1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.100\",\"matchCriteriaId\":\"094B81E0-B756-4727-85CA-F3F8D1C9D116\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.40\",\"matchCriteriaId\":\"0099D5A4-B157-4D36-8858-982C7D579030\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*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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": "None",
"current_release_date": "2026-06-30T10:23:59+00:00",
"cve": "CVE-2025-38481",
"id": "CVE-2025-38481",
"initial_release_date": "2025-07-28T00:00:00+00:00",
"product_status:known_not_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: comedi: Fail COMEDI_INSNLIST ioctl if n_insns is too large",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38481.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "low",
"current_release_date": "2026-08-28T17:00:48Z",
"cve": "CVE-2025-38481",
"id": "CVE-2025-38481",
"initial_release_date": "2025-07-28T23:22:43Z",
"product_status:first_fixed": "2",
"product_status:known_affected": "791",
"product_status:known_not_affected": "43",
"product_status:recommended": "472",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2025-38481",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-38481.json",
"version": "44"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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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.
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