mirror of
https://github.com/fkie-cad/nvd-json-data-feeds.git
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61 lines
4.6 KiB
JSON
61 lines
4.6 KiB
JSON
{
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"id": "CVE-2024-26654",
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"published": "2024-04-01T09:15:51.063",
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"lastModified": "2024-06-25T21:15:58.207",
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"vulnStatus": "Awaiting Analysis",
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"cveTags": [],
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: sh: aica: reorder cleanup operations to avoid UAF bugs\n\nThe dreamcastcard->timer could schedule the spu_dma_work and the\nspu_dma_work could also arm the dreamcastcard->timer.\n\nWhen the snd_pcm_substream is closing, the aica_channel will be\ndeallocated. But it could still be dereferenced in the worker\nthread. The reason is that del_timer() will return directly\nregardless of whether the timer handler is running or not and\nthe worker could be rescheduled in the timer handler. As a result,\nthe UAF bug will happen. The racy situation is shown below:\n\n (Thread 1) | (Thread 2)\nsnd_aicapcm_pcm_close() |\n ... | run_spu_dma() //worker\n | mod_timer()\n flush_work() |\n del_timer() | aica_period_elapsed() //timer\n kfree(dreamcastcard->channel) | schedule_work()\n | run_spu_dma() //worker\n ... | dreamcastcard->channel-> //USE\n\nIn order to mitigate this bug and other possible corner cases,\ncall mod_timer() conditionally in run_spu_dma(), then implement\nPCM sync_stop op to cancel both the timer and worker. The sync_stop\nop will be called from PCM core appropriately when needed."
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},
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{
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"lang": "es",
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ALSA: sh: aica: reordenar operaciones de limpieza para evitar errores UAF. El dreamcastcard->timer podr\u00eda programar el spu_dma_work y el spu_dma_work tambi\u00e9n podr\u00eda armar el dreamcastcard->timer. Cuando se cierre snd_pcm_substream, se desasignar\u00e1 aica_channel. Pero a\u00fan se podr\u00eda eliminar la referencia en el hilo del trabajador. La raz\u00f3n es que del_timer() regresar\u00e1 directamente independientemente de si el controlador del temporizador se est\u00e1 ejecutando o no y el trabajador podr\u00eda reprogramarse en el controlador del temporizador. Como resultado, se producir\u00e1 el error UAF. La situaci\u00f3n picante se muestra a continuaci\u00f3n: (Thread 1) | (Thread 2) snd_aicapcm_pcm_close() | ... | run_spu_dma() //worker | mod_timer() flush_work() | del_timer() | aica_period_elapsed() //timer kfree(dreamcastcard->channel) | schedule_work() | run_spu_dma() //worker ... | dreamcastcard->channel-> //USE Para mitigar este error y otros posibles casos extremos, llame a mod_timer() condicionalmente en run_spu_dma(), luego implemente la operaci\u00f3n PCM sync_stop para cancelar tanto el temporizador como el trabajador. La operaci\u00f3n sync_stop se llamar\u00e1 desde el n\u00facleo PCM de forma adecuada cuando sea necesario."
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}
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],
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"metrics": {},
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/051e0840ffa8ab25554d6b14b62c9ab9e4901457",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/3c907bf56905de7d27b329afaf59c2fb35d17b04",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/4206ad65a0ee76920041a755bd3c17c6ba59bba2",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/61d4787692c1fccdc268ffa7a891f9c149f50901",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/8c990221681688da34295d6d76cc2f5b963e83f5",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/9d66ae0e7bb78b54e1e0525456c6b54e1d132046",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/aa39e6878f61f50892ee2dd9d2176f72020be845",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/e955e8a7f38a856fc6534ba4e6bffd4d5cc80ac3",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/eeb2a2ca0b8de7e1c66afaf719529154e7dc60b2",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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}
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]
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} |