CVE-2025-21996 (GCVE-0-2025-21996)
Vulnerability from cvelistv5
Published
2025-04-03 07:18
Modified
2025-05-04 07:27
Severity ?
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)
References
Impacted products
Vendor Product Version
Linux Linux Version: 2fc5703abda201f138faf63bdca743d04dbf4b1a
Version: 2fc5703abda201f138faf63bdca743d04dbf4b1a
Version: 2fc5703abda201f138faf63bdca743d04dbf4b1a
Version: 2fc5703abda201f138faf63bdca743d04dbf4b1a
Version: 2fc5703abda201f138faf63bdca743d04dbf4b1a
Version: 2fc5703abda201f138faf63bdca743d04dbf4b1a
Version: 2fc5703abda201f138faf63bdca743d04dbf4b1a
Version: 2fc5703abda201f138faf63bdca743d04dbf4b1a
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    "dateReserved": "2024-12-29T08:45:45.801Z",
    "dateUpdated": "2025-05-04T07:27:03.444Z",
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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. 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. 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}


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