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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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. 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"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"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-08-29T01:25:48Z",
"cve": "CVE-2025-21996",
"id": "CVE-2025-21996",
"initial_release_date": "2025-04-05T02:24:44Z",
"product_status:known_affected": "716",
"product_status:known_not_affected": "22",
"product_status:recommended": "424",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2025-21996",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-21996.json",
"version": "46"
},
"vulnrichment": {
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\"versions\": [{\"status\": \"affected\", \"version\": \"3.15\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"3.15\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.292\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.236\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.180\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.132\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.85\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.21\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.13.9\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.13.*\"}, {\"status\": \"unaffected\", \"version\": \"6.14\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/gpu/drm/radeon/radeon_vce.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/0effb378ebce52b897f85cd7f828854b8c7cb636\"}, {\"url\": \"https://git.kernel.org/stable/c/5b4d9d20fd455a97920cf158dd19163b879cf65d\"}, {\"url\": \"https://git.kernel.org/stable/c/9b2da9c673a0da1359a2151f7ce773e2f77d71a9\"}, {\"url\": \"https://git.kernel.org/stable/c/78b07dada3f02f77762d0755a96d35f53b02be69\"}, {\"url\": \"https://git.kernel.org/stable/c/3ce08215cad55c10a6eeeb33d3583b6cfffe3ab8\"}, {\"url\": \"https://git.kernel.org/stable/c/dd1801aa01bba1760357f2a641346ae149686713\"}, {\"url\": \"https://git.kernel.org/stable/c/f5e049028124f755283f2c07e7a3708361ed1dc8\"}, {\"url\": \"https://git.kernel.org/stable/c/dd8689b52a24807c2d5ce0a17cb26dc87f75235c\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"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)\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.292\", \"versionStartIncluding\": \"3.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.236\", \"versionStartIncluding\": \"3.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.180\", \"versionStartIncluding\": \"3.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.132\", \"versionStartIncluding\": \"3.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.85\", \"versionStartIncluding\": \"3.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.21\", \"versionStartIncluding\": \"3.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.13.9\", \"versionStartIncluding\": \"3.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.14\", \"versionStartIncluding\": \"3.15\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T07:27:03.444Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2025-21996\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-10-01T18:15:11.775Z\", \"dateReserved\": \"2024-12-29T08:45:45.801Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-04-03T07:18:59.933Z\", \"assignerShortName\": \"Linux\"}",
"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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