{"dataType":"CVE_RECORD","cveMetadata":{"cveId":"CVE-2024-26654","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-02-19T14:20:24.144Z","datePublished":"2024-04-01T08:35:19.763Z","dateUpdated":"2026-05-11T20:01:35.213Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T20:01:35.213Z"},"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->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."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/sh/aica.c"],"versions":[{"version":"198de43d758ca2700e2b52b49c0b189b4931466c","lessThan":"eeb2a2ca0b8de7e1c66afaf719529154e7dc60b2","status":"affected","versionType":"git"},{"version":"198de43d758ca2700e2b52b49c0b189b4931466c","lessThan":"4206ad65a0ee76920041a755bd3c17c6ba59bba2","status":"affected","versionType":"git"},{"version":"198de43d758ca2700e2b52b49c0b189b4931466c","lessThan":"aa39e6878f61f50892ee2dd9d2176f72020be845","status":"affected","versionType":"git"},{"version":"198de43d758ca2700e2b52b49c0b189b4931466c","lessThan":"8c990221681688da34295d6d76cc2f5b963e83f5","status":"affected","versionType":"git"},{"version":"198de43d758ca2700e2b52b49c0b189b4931466c","lessThan":"9d66ae0e7bb78b54e1e0525456c6b54e1d132046","status":"affected","versionType":"git"},{"version":"198de43d758ca2700e2b52b49c0b189b4931466c","lessThan":"61d4787692c1fccdc268ffa7a891f9c149f50901","status":"affected","versionType":"git"},{"version":"198de43d758ca2700e2b52b49c0b189b4931466c","lessThan":"e955e8a7f38a856fc6534ba4e6bffd4d5cc80ac3","status":"affected","versionType":"git"},{"version":"198de43d758ca2700e2b52b49c0b189b4931466c","lessThan":"3c907bf56905de7d27b329afaf59c2fb35d17b04","status":"affected","versionType":"git"},{"version":"198de43d758ca2700e2b52b49c0b189b4931466c","lessThan":"051e0840ffa8ab25554d6b14b62c9ab9e4901457","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/sh/aica.c"],"versions":[{"version":"2.6.23","status":"affected"},{"version":"0","lessThan":"2.6.23","status":"unaffected","versionType":"semver"},{"version":"4.19.312","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.274","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.215","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.154","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.84","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.24","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.7.12","lessThanOrEqual":"6.7.*","status":"unaffected","versionType":"semver"},{"version":"6.8.3","lessThanOrEqual":"6.8.*","status":"unaffected","versionType":"semver"},{"version":"6.9","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.23","versionEndExcluding":"4.19.312"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.23","versionEndExcluding":"5.4.274"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.23","versionEndExcluding":"5.10.215"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.23","versionEndExcluding":"5.15.154"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.23","versionEndExcluding":"6.1.84"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.23","versionEndExcluding":"6.6.24"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.23","versionEndExcluding":"6.7.12"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.23","versionEndExcluding":"6.8.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.23","versionEndExcluding":"6.9"}]}]}],"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: 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