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Specifically, 'size'\nwill point to 'tmp' variable before the latter had a chance to be\nassigned any value.\n\nPlay it safe and init 'tmp' 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, 'size' apuntar\u00e1 a la variable 'tmp' antes de que a esta \u00faltima se le haya asignado alg\u00fan valor. Vaya a lo seguro e inicialice 'tmp' 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": "2025-10-01T19:15:34.960", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "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"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "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"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2025-04-03T08:15:15.007", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0effb378ebce52b897f85cd7f828854b8c7cb636"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3ce08215cad55c10a6eeeb33d3583b6cfffe3ab8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5b4d9d20fd455a97920cf158dd19163b879cf65d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/78b07dada3f02f77762d0755a96d35f53b02be69"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9b2da9c673a0da1359a2151f7ce773e2f77d71a9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/dd1801aa01bba1760357f2a641346ae149686713"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/dd8689b52a24807c2d5ce0a17cb26dc87f75235c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f5e049028124f755283f2c07e7a3708361ed1dc8"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"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"}]}

{"bugzilla": {"description": "kernel: drm/radeon: fix uninitialized size issue in radeon_vce_cs_parse()", "id": "2357132", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2357132"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-908", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndrm/radeon: fix uninitialized size issue in radeon_vce_cs_parse()\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, 'size'\nwill point to 'tmp' variable before the latter had a chance to be\nassigned any value.\nPlay it safe and init 'tmp' with 0, thus ensuring that\nradeon_vce_cs_reloc() will catch an early error in cases like these.\nFound by Linux Verification Center (linuxtesting.org) with static\nanalysis tool SVACE.\n(cherry picked from commit 2d52de55f9ee7aaee0e09ac443f77855989c6b68)"], "name": "CVE-2025-21996", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-04-03T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-21996\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-21996\nhttps://lore.kernel.org/linux-cve-announce/2025040348-CVE-2025-21996-8e4a@gregkh/T"], "threat_severity": "Low"}