CVE-2025-39714
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: media: usbtv: Lock resolution while streaming When an program is streaming (ffplay) and another program (qv4l2) changes the TV standard from NTSC to PAL, the kernel crashes due to trying to copy to unmapped memory. Changing from NTSC to PAL increases the resolution in the usbtv struct, but the video plane buffer isn't adjusted, so it overflows. [hverkuil: call vb2_is_busy instead of vb2_is_streaming]
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-09-05 18:15:48.850000
Last modified
2026-10-19 21:10:00.160000
View original CVE JSON
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"published": "2025-09-05T18:15:48.850",
"lastModified": "2026-10-19T21:10:00.160",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: usbtv: Lock resolution while streaming\n\nWhen an program is streaming (ffplay) and another program (qv4l2)\nchanges the TV standard from NTSC to PAL, the kernel crashes due to trying\nto copy to unmapped memory.\n\nChanging from NTSC to PAL increases the resolution in the usbtv struct,\nbut the video plane buffer isn't adjusted, so it overflows.\n\n[hverkuil: call vb2_is_busy instead of vb2_is_streaming]"
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nmedia: usbtv: Bloquear la resolución durante la transmisión\n\nCuando un programa está transmitiendo (ffplay) y otro programa (qv4l2) cambia el estándar de TV de NTSC a PAL, el kernel falla debido a que intenta copiar a memoria no mapeada.\n\nCambiar de NTSC a PAL aumenta la resolución en la estructura usbtv, pero el búfer del plano de video no se ajusta, por lo que se desborda.\n\n[hverkuil: llamar a vb2_is_busy en lugar de vb2_is_streaming]"
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