CVE-2025-21996 (GCVE-0-2025-21996)
Vulnerability from cvelistv5 – Published: 2025-04-03 07:18 – Updated: 2026-05-11 21:10
VLAI
EPSS
VEX
Title
drm/radeon: fix uninitialized size issue in radeon_vce_cs_parse()
Summary
In the Linux kernel, the following vulnerability has been resolved:
drm/radeon: fix uninitialized size issue in radeon_vce_cs_parse()
On the off chance that command stream passed from userspace via
ioctl() call to radeon_vce_cs_parse() is weirdly crafted and
first command to execute is to encode (case 0x03000001), the function
in question will attempt to call radeon_vce_cs_reloc() with size
argument that has not been properly initialized. Specifically, 'size'
will point to 'tmp' variable before the latter had a chance to be
assigned any value.
Play it safe and init 'tmp' with 0, thus ensuring that
radeon_vce_cs_reloc() will catch an early error in cases like these.
Found by Linux Verification Center (linuxtesting.org) with static
analysis tool SVACE.
(cherry picked from commit 2d52de55f9ee7aaee0e09ac443f77855989c6b68)
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-01 18:15 UTC
CWE
- CWE-908 - Use of Uninitialized Resource
Assigner
References
10 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
2fc5703abda201f138faf63bdca743d04dbf4b1a , < 0effb378ebce52b897f85cd7f828854b8c7cb636
(git)
Affected: 2fc5703abda201f138faf63bdca743d04dbf4b1a , < 5b4d9d20fd455a97920cf158dd19163b879cf65d (git) Affected: 2fc5703abda201f138faf63bdca743d04dbf4b1a , < 9b2da9c673a0da1359a2151f7ce773e2f77d71a9 (git) Affected: 2fc5703abda201f138faf63bdca743d04dbf4b1a , < 78b07dada3f02f77762d0755a96d35f53b02be69 (git) Affected: 2fc5703abda201f138faf63bdca743d04dbf4b1a , < 3ce08215cad55c10a6eeeb33d3583b6cfffe3ab8 (git) Affected: 2fc5703abda201f138faf63bdca743d04dbf4b1a , < dd1801aa01bba1760357f2a641346ae149686713 (git) Affected: 2fc5703abda201f138faf63bdca743d04dbf4b1a , < f5e049028124f755283f2c07e7a3708361ed1dc8 (git) Affected: 2fc5703abda201f138faf63bdca743d04dbf4b1a , < dd8689b52a24807c2d5ce0a17cb26dc87f75235c (git) |
guessed | |
| Linux | Linux |
Affected:
3.15
Unaffected: 0 , < 3.15 (semver) Unaffected: 5.4.292 , ≤ 5.4.* (semver) Unaffected: 5.10.236 , ≤ 5.10.* (semver) Unaffected: 5.15.180 , ≤ 5.15.* (semver) Unaffected: 6.1.132 , ≤ 6.1.* (semver) Unaffected: 6.6.85 , ≤ 6.6.* (semver) Unaffected: 6.12.21 , ≤ 6.12.* (semver) Unaffected: 6.13.9 , ≤ 6.13.* (semver) Unaffected: 6.14 , ≤ * (original_commit_for_fix) |
guessed |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/radeon: fix uninitialized size issue in radeon_vce_cs_parse()\n\nOn the off chance that command stream passed from userspace via\nioctl() call to radeon_vce_cs_parse() is weirdly crafted and\nfirst command to execute is to encode (case 0x03000001), the function\nin question will attempt to call radeon_vce_cs_reloc() with size\nargument that has not been properly initialized. Specifically, \u0027size\u0027\nwill point to \u0027tmp\u0027 variable before the latter had a chance to be\nassigned any value.\n\nPlay it safe and init \u0027tmp\u0027 with 0, thus ensuring that\nradeon_vce_cs_reloc() will catch an early error in cases like these.\n\nFound by Linux Verification Center (linuxtesting.org) with static\nanalysis tool SVACE.\n\n(cherry picked from commit 2d52de55f9ee7aaee0e09ac443f77855989c6b68)"
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/radeon: soluciona el problema de tama\u00f1o no inicializado en radeon_vce_cs_parse() En el improbable caso de que el flujo de comandos pasado desde el espacio de usuario a trav\u00e9s de la llamada ioctl() a radeon_vce_cs_parse() est\u00e9 manipulado de forma extra\u00f1a y el primer comando a ejecutar sea codificar (caso 0x03000001), la funci\u00f3n en cuesti\u00f3n intentar\u00e1 llamar a radeon_vce_cs_reloc() con el argumento de tama\u00f1o que no se ha inicializado correctamente. Espec\u00edficamente, \u0027size\u0027 apuntar\u00e1 a la variable \u0027tmp\u0027 antes de que a esta \u00faltima se le haya asignado alg\u00fan valor. Vaya a lo seguro e inicialice \u0027tmp\u0027 con 0, lo que garantiza que radeon_vce_cs_reloc() detecte un error temprano en casos como estos. Encontrado por el Centro de Verificaci\u00f3n de Linux (linuxtesting.org) con la herramienta de an\u00e1lisis est\u00e1tico SVACE. (seleccionado del commit 2d52de55f9ee7aaee0e09ac443f77855989c6b68)"
}
],
"id": "CVE-2025-21996",
"lastModified": "2026-06-17T08:44:48.000",
"metrics": {
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"scope": "UNCHANGED",
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"scope": "UNCHANGED",
"userInteraction": "NONE",
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},
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"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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{
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},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-10-01T18:15:07.384970Z",
"version": "2.0.3"
}
}
]
},
"published": "2025-04-03T08:15:15.007",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
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{
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},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
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{
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"tags": [
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},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/f5e049028124f755283f2c07e7a3708361ed1dc8"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Modified",
"weaknesses": [
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"description": [
{
"lang": "en",
"value": "CWE-908"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-908"
}
],
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2026-06-30T10:23:59+00:00",
"cve": "CVE-2025-21996",
"id": "CVE-2025-21996",
"initial_release_date": "2025-04-03T00:00:00+00:00",
"product_status:known_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: drm/radeon: fix uninitialized size issue in radeon_vce_cs_parse()",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-21996.json",
"version": "3"
},
"vulnrichment": {
"containers": {
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"metrics": [
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"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
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"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2025-21996",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-10-01T18:15:07.384970Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
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"descriptions": [
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"cweId": "CWE-908",
"description": "CWE-908 Use of Uninitialized Resource",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-10-01T14:39:11.786Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/gpu/drm/radeon/radeon_vce.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
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"status": "affected",
"version": "2fc5703abda201f138faf63bdca743d04dbf4b1a",
"versionType": "git"
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{
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"status": "affected",
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{
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"versionType": "git"
},
{
"lessThan": "3ce08215cad55c10a6eeeb33d3583b6cfffe3ab8",
"status": "affected",
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"vendor": "Linux",
"versions": [
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},
{
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"version": "0",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "5.4.292",
"versionType": "semver"
},
{
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"version": "5.10.236",
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},
{
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},
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},
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},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.21",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.13.*",
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"version": "6.13.9",
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{
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/radeon: fix uninitialized size issue in radeon_vce_cs_parse()\n\nOn the off chance that command stream passed from userspace via\nioctl() call to radeon_vce_cs_parse() is weirdly crafted and\nfirst command to execute is to encode (case 0x03000001), the function\nin question will attempt to call radeon_vce_cs_reloc() with size\nargument that has not been properly initialized. Specifically, \u0027size\u0027\nwill point to \u0027tmp\u0027 variable before the latter had a chance to be\nassigned any value.\n\nPlay it safe and init \u0027tmp\u0027 with 0, thus ensuring that\nradeon_vce_cs_reloc() will catch an early error in cases like these.\n\nFound by Linux Verification Center (linuxtesting.org) with static\nanalysis tool SVACE.\n\n(cherry picked from commit 2d52de55f9ee7aaee0e09ac443f77855989c6b68)"
}
],
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},
{
"url": "https://git.kernel.org/stable/c/dd8689b52a24807c2d5ce0a17cb26dc87f75235c"
}
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"title": "drm/radeon: fix uninitialized size issue in radeon_vce_cs_parse()",
"x_generator": {
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}
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},
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"cveId": "CVE-2025-21996",
"datePublished": "2025-04-03T07:18:59.933Z",
"dateReserved": "2024-12-29T08:45:45.801Z",
"dateUpdated": "2025-10-01T18:15:11.775Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
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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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