cve-2024-26654
Vulnerability from cvelistv5
Published
2024-04-01 08:35
Modified
2024-11-05 09:13
Severity ?
EPSS score ?
Summary
ALSA: sh: aica: reorder cleanup operations to avoid UAF bugs
References
Impacted products
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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-\u003echannel) | schedule_work()\n | run_spu_dma() //worker\n ... | dreamcastcard-\u003echannel-\u003e //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." } ], "providerMetadata": { "dateUpdated": "2024-11-05T09:13:17.089Z", "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux" }, "references": [ { "url": "https://git.kernel.org/stable/c/eeb2a2ca0b8de7e1c66afaf719529154e7dc60b2" }, { "url": "https://git.kernel.org/stable/c/4206ad65a0ee76920041a755bd3c17c6ba59bba2" }, { "url": "https://git.kernel.org/stable/c/aa39e6878f61f50892ee2dd9d2176f72020be845" }, { "url": "https://git.kernel.org/stable/c/8c990221681688da34295d6d76cc2f5b963e83f5" }, { "url": "https://git.kernel.org/stable/c/9d66ae0e7bb78b54e1e0525456c6b54e1d132046" }, { "url": "https://git.kernel.org/stable/c/61d4787692c1fccdc268ffa7a891f9c149f50901" }, { "url": "https://git.kernel.org/stable/c/e955e8a7f38a856fc6534ba4e6bffd4d5cc80ac3" }, { "url": "https://git.kernel.org/stable/c/3c907bf56905de7d27b329afaf59c2fb35d17b04" }, { "url": "https://git.kernel.org/stable/c/051e0840ffa8ab25554d6b14b62c9ab9e4901457" } ], "title": "ALSA: sh: aica: reorder cleanup operations to avoid UAF bugs", "x_generator": { "engine": "bippy-9e1c9544281a" } } }, "cveMetadata": { "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "assignerShortName": "Linux", "cveId": "CVE-2024-26654", "datePublished": "2024-04-01T08:35:19.763Z", "dateReserved": "2024-02-19T14:20:24.144Z", "dateUpdated": "2024-11-05T09:13:17.089Z", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.1", "meta": { "nvd": "{\"cve\":{\"id\":\"CVE-2024-26654\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-04-01T09:15:51.063\",\"lastModified\":\"2024-11-21T09:02:46.457\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"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-\u003etimer could schedule the spu_dma_work and the\\nspu_dma_work could also arm the dreamcastcard-\u003etimer.\\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-\u003echannel) | schedule_work()\\n | run_spu_dma() //worker\\n ... | dreamcastcard-\u003echannel-\u003e //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.\"},{\"lang\":\"es\",\"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-\u0026gt;timer podr\u00eda programar el spu_dma_work y el spu_dma_work tambi\u00e9n podr\u00eda armar el dreamcastcard-\u0026gt;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-\u0026gt;channel) | schedule_work() | run_spu_dma() //worker ... | dreamcastcard-\u0026gt;channel-\u0026gt; //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.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/051e0840ffa8ab25554d6b14b62c9ab9e4901457\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3c907bf56905de7d27b329afaf59c2fb35d17b04\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4206ad65a0ee76920041a755bd3c17c6ba59bba2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/61d4787692c1fccdc268ffa7a891f9c149f50901\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8c990221681688da34295d6d76cc2f5b963e83f5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9d66ae0e7bb78b54e1e0525456c6b54e1d132046\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/aa39e6878f61f50892ee2dd9d2176f72020be845\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e955e8a7f38a856fc6534ba4e6bffd4d5cc80ac3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/eeb2a2ca0b8de7e1c66afaf719529154e7dc60b2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/051e0840ffa8ab25554d6b14b62c9ab9e4901457\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/3c907bf56905de7d27b329afaf59c2fb35d17b04\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/4206ad65a0ee76920041a755bd3c17c6ba59bba2\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/61d4787692c1fccdc268ffa7a891f9c149f50901\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/8c990221681688da34295d6d76cc2f5b963e83f5\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/9d66ae0e7bb78b54e1e0525456c6b54e1d132046\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/aa39e6878f61f50892ee2dd9d2176f72020be845\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/e955e8a7f38a856fc6534ba4e6bffd4d5cc80ac3\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/eeb2a2ca0b8de7e1c66afaf719529154e7dc60b2\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}" } }
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Sightings
Author | Source | Type | Date |
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Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.