CVE-2024-26654 (GCVE-0-2024-26654)

Vulnerability from cvelistv5 – Published: 2024-04-01 08:35 – Updated: 2025-05-04 08:53
VLAI?
Title
ALSA: sh: aica: reorder cleanup operations to avoid UAF bugs
Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: sh: aica: reorder cleanup operations to avoid UAF bugs The dreamcastcard->timer could schedule the spu_dma_work and the spu_dma_work could also arm the dreamcastcard->timer. When the snd_pcm_substream is closing, the aica_channel will be deallocated. But it could still be dereferenced in the worker thread. The reason is that del_timer() will return directly regardless of whether the timer handler is running or not and the worker could be rescheduled in the timer handler. As a result, the UAF bug will happen. The racy situation is shown below: (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 In order to mitigate this bug and other possible corner cases, call mod_timer() conditionally in run_spu_dma(), then implement PCM sync_stop op to cancel both the timer and worker. The sync_stop op will be called from PCM core appropriately when needed.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 198de43d758ca2700e2b52b49c0b189b4931466c , < eeb2a2ca0b8de7e1c66afaf719529154e7dc60b2 (git)
Affected: 198de43d758ca2700e2b52b49c0b189b4931466c , < 4206ad65a0ee76920041a755bd3c17c6ba59bba2 (git)
Affected: 198de43d758ca2700e2b52b49c0b189b4931466c , < aa39e6878f61f50892ee2dd9d2176f72020be845 (git)
Affected: 198de43d758ca2700e2b52b49c0b189b4931466c , < 8c990221681688da34295d6d76cc2f5b963e83f5 (git)
Affected: 198de43d758ca2700e2b52b49c0b189b4931466c , < 9d66ae0e7bb78b54e1e0525456c6b54e1d132046 (git)
Affected: 198de43d758ca2700e2b52b49c0b189b4931466c , < 61d4787692c1fccdc268ffa7a891f9c149f50901 (git)
Affected: 198de43d758ca2700e2b52b49c0b189b4931466c , < e955e8a7f38a856fc6534ba4e6bffd4d5cc80ac3 (git)
Affected: 198de43d758ca2700e2b52b49c0b189b4931466c , < 3c907bf56905de7d27b329afaf59c2fb35d17b04 (git)
Affected: 198de43d758ca2700e2b52b49c0b189b4931466c , < 051e0840ffa8ab25554d6b14b62c9ab9e4901457 (git)
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    Linux Linux Affected: 2.6.23
Unaffected: 0 , < 2.6.23 (semver)
Unaffected: 4.19.312 , ≤ 4.19.* (semver)
Unaffected: 5.4.274 , ≤ 5.4.* (semver)
Unaffected: 5.10.215 , ≤ 5.10.* (semver)
Unaffected: 5.15.154 , ≤ 5.15.* (semver)
Unaffected: 6.1.84 , ≤ 6.1.* (semver)
Unaffected: 6.6.24 , ≤ 6.6.* (semver)
Unaffected: 6.7.12 , ≤ 6.7.* (semver)
Unaffected: 6.8.3 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
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\"lessThanOrEqual\": \"6.7.*\"}, {\"status\": \"unaffected\", \"version\": \"6.8.3\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.8.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"sound/sh/aica.c\"], \"defaultStatus\": \"affected\"}], \"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\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"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.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.312\", \"versionStartIncluding\": \"2.6.23\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.274\", \"versionStartIncluding\": \"2.6.23\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.215\", \"versionStartIncluding\": \"2.6.23\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.154\", \"versionStartIncluding\": \"2.6.23\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.84\", \"versionStartIncluding\": \"2.6.23\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.24\", \"versionStartIncluding\": \"2.6.23\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7.12\", \"versionStartIncluding\": \"2.6.23\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8.3\", \"versionStartIncluding\": \"2.6.23\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9\", \"versionStartIncluding\": \"2.6.23\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T08:53:11.500Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-26654\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T08:53:11.500Z\", \"dateReserved\": \"2024-02-19T14:20:24.144Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-04-01T08:35:19.763Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.