CVE-2024-26654

{"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": "2026-08-05T11:26:33.368Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:26:33.368Z"}, "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."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerable code is reached only through the ALSA PCM character device `/dev/snd/pcmC0D0p` via open/ioctl(PREPARE,START)/close on the local system. There is no network-facing path into the Dreamcast AICA driver.\nAC:L - The attacker drives both sides of the race \u2014 arming the self-rearming timer/work pair with TRIGGER_START and then closing the substream \u2014 and the timer rearms every jiffy, so the window recurs continuously and a tight open/start/close loop wins it reliably. No condition outside the attacker's control is required.\nPR:L - Only a local unprivileged account with access to the sound device node is needed (audio group or console-user ACL); no capability, CAP_SYS_ADMIN, or root check exists anywhere on the `snd_pcm_release_substream()` \u2192 `snd_aicapcm_pcm_close()` path.\nUI:N - The attacking process performs every step itself \u2014 opening the PCM device, starting playback, and closing it \u2014 with no action from any other user.\nS:U - The use-after-free corrupts kernel slab memory within the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Use-after-free on a kmalloc-32 object: `startup_aica()` reads all 32 bytes of the freed `struct aica_channel` and DMAs them into SPU memory, and the freed slot can be groomed to hold attacker-selected reclaimed kernel objects, giving a path to kernel memory disclosure.\nI:H - `run_spu_dma()` performs `dreamcastcard->channel->flags |= 0x01` on freed memory \u2014 a read-modify-write into a reclaimed kmalloc-32 object the attacker can heap-spray, yielding a controlled write primitive usable for privilege escalation.\nA:H - The revived worker also dereferences `dreamcastcard->substream` after close sets it to NULL, giving a deterministic oops, and the UAF itself corrupts slab state leading to kernel panic."}]}], "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": 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"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": 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"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-1.2.0"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T00:07:19.846Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/eeb2a2ca0b8de7e1c66afaf719529154e7dc60b2", "tags": ["x_transferred"]}, {"url": 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There is no network-facing path into the Dreamcast AICA driver.\nAC:L - The attacker drives both sides of the race \u2014 arming the self-rearming timer/work pair with TRIGGER_START and then closing the substream \u2014 and the timer rearms every jiffy, so the window recurs continuously and a tight open/start/close loop wins it reliably. No condition outside the attacker's control is required.\nPR:L - Only a local unprivileged account with access to the sound device node is needed (audio group or console-user ACL); no capability, CAP_SYS_ADMIN, or root check exists anywhere on the `snd_pcm_release_substream()` \u2192 `snd_aicapcm_pcm_close()` path.\nUI:N - The attacking process performs every step itself \u2014 opening the PCM device, starting playback, and closing it \u2014 with no action from any other user.\nS:U - The use-after-free corrupts kernel slab memory within the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Use-after-free on a kmalloc-32 object: `startup_aica()` reads all 32 bytes of the freed `struct aica_channel` and DMAs them into SPU memory, and the freed slot can be groomed to hold attacker-selected reclaimed kernel objects, giving a path to kernel memory disclosure.\nI:H - `run_spu_dma()` performs `dreamcastcard->channel->flags |= 0x01` on freed memory \u2014 a read-modify-write into a reclaimed kmalloc-32 object the attacker can heap-spray, yielding a controlled write primitive usable for privilege escalation.\nA:H - The revived worker also dereferences `dreamcastcard->substream` after close sets it to NULL, giving a deterministic oops, and the UAF itself corrupts slab state leading to kernel panic."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "198de43d758ca2700e2b52b49c0b189b4931466c", "lessThan": "eeb2a2ca0b8de7e1c66afaf719529154e7dc60b2", "versionType": "git"}, {"status": "affected", "version": "198de43d758ca2700e2b52b49c0b189b4931466c", "lessThan": "4206ad65a0ee76920041a755bd3c17c6ba59bba2", "versionType": "git"}, {"status": "affected", "version": "198de43d758ca2700e2b52b49c0b189b4931466c", "lessThan": "aa39e6878f61f50892ee2dd9d2176f72020be845", "versionType": "git"}, {"status": "affected", "version": "198de43d758ca2700e2b52b49c0b189b4931466c", "lessThan": "8c990221681688da34295d6d76cc2f5b963e83f5", "versionType": "git"}, {"status": "affected", "version": "198de43d758ca2700e2b52b49c0b189b4931466c", "lessThan": "9d66ae0e7bb78b54e1e0525456c6b54e1d132046", "versionType": "git"}, {"status": "affected", "version": "198de43d758ca2700e2b52b49c0b189b4931466c", "lessThan": "61d4787692c1fccdc268ffa7a891f9c149f50901", "versionType": "git"}, {"status": "affected", "version": "198de43d758ca2700e2b52b49c0b189b4931466c", "lessThan": "e955e8a7f38a856fc6534ba4e6bffd4d5cc80ac3", "versionType": "git"}, {"status": "affected", "version": "198de43d758ca2700e2b52b49c0b189b4931466c", "lessThan": "3c907bf56905de7d27b329afaf59c2fb35d17b04", "versionType": "git"}, {"status": "affected", "version": "198de43d758ca2700e2b52b49c0b189b4931466c", "lessThan": "051e0840ffa8ab25554d6b14b62c9ab9e4901457", "versionType": "git"}], "programFiles": ["sound/sh/aica.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "2.6.23"}, {"status": "unaffected", "version": "0", "lessThan": "2.6.23", "versionType": "semver"}, {"status": "unaffected", "version": "4.19.312", "versionType": "semver", "lessThanOrEqual": "4.19.*"}, {"status": "unaffected", "version": "5.4.274", "versionType": "semver", "lessThanOrEqual": "5.4.*"}, {"status": "unaffected", "version": "5.10.215", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.154", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.84", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.24", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.7.12", "versionType": "semver", "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->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."}], "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": "2026-08-05T11:26:33.368Z"}}}, "cveMetadata": {"cveId": "CVE-2024-26654", "state": "PUBLISHED", "dateUpdated": "2026-08-05T11:26:33.368Z", "dateReserved": "2024-02-19T14:20:24.144Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-04-01T08:35:19.763Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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"07B237A9-69A3-4A9C-9DA0-4E06BD37AE73", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "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->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."}, {"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->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."}], "id": "CVE-2024-26654", "lastModified": "2026-08-04T11:16:53.580", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-26654", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-10T15:53:59.432754Z", "version": "2.0.3"}}]}, "published": "2024-04-01T09:15:51.063", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/051e0840ffa8ab25554d6b14b62c9ab9e4901457"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3c907bf56905de7d27b329afaf59c2fb35d17b04"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4206ad65a0ee76920041a755bd3c17c6ba59bba2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/61d4787692c1fccdc268ffa7a891f9c149f50901"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8c990221681688da34295d6d76cc2f5b963e83f5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9d66ae0e7bb78b54e1e0525456c6b54e1d132046"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/aa39e6878f61f50892ee2dd9d2176f72020be845"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e955e8a7f38a856fc6534ba4e6bffd4d5cc80ac3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/eeb2a2ca0b8de7e1c66afaf719529154e7dc60b2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/051e0840ffa8ab25554d6b14b62c9ab9e4901457"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3c907bf56905de7d27b329afaf59c2fb35d17b04"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4206ad65a0ee76920041a755bd3c17c6ba59bba2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/61d4787692c1fccdc268ffa7a891f9c149f50901"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8c990221681688da34295d6d76cc2f5b963e83f5"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9d66ae0e7bb78b54e1e0525456c6b54e1d132046"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/aa39e6878f61f50892ee2dd9d2176f72020be845"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e955e8a7f38a856fc6534ba4e6bffd4d5cc80ac3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/eeb2a2ca0b8de7e1c66afaf719529154e7dc60b2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List"], "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: ALSA: sh: aica: reorder cleanup operations to avoid UAF bugs", "id": "2272446", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2272446"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-416", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nALSA: sh: aica: reorder cleanup operations to avoid UAF bugs\nThe dreamcastcard->timer could schedule the spu_dma_work and the\nspu_dma_work could also arm the dreamcastcard->timer.\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(Thread 1) | (Thread 2)\nsnd_aicapcm_pcm_close() |\n... | run_spu_dma() //worker\n| mod_timer()\nflush_work() |\ndel_timer() | aica_period_elapsed() //timer\nkfree(dreamcastcard->channel) | schedule_work()\n| run_spu_dma() //worker\n... | dreamcastcard->channel-> //USE\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.", "A vulnerability was found in the ALSA sh driver of Linux Kernel, when the snd_pcm_substream closes and deallocates aica_channel, which can still be accessed by the spu_dma_work scheduled by dreamcastcard->timer and del_timer() returns directly, allowing the worker thread to be rescheduled during timer handling potentially leads to an Use-After-Free."], "mitigation": {"lang": "en:us", "value": "Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible."}, "name": "CVE-2024-26654", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-04-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-26654\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-26654\nhttps://lore.kernel.org/linux-cve-announce/2024040142-CVE-2024-26654-aa6c@gregkh/T"], "threat_severity": "Moderate"}

{}