CVE-2024-57893

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It stores the data\nin the internal buffer and this access is racy as of now, which may\nlead to the out-of-bounds access.\n\nAs a temporary band-aid fix, introduce a mutex for serializing the\nprocess of the SysEx message packets."}], "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 write() on the OSS sequencer character device /dev/sequencer or /dev/music, which requires local access to the machine. There is no remote or network path into snd_seq_oss_synth_sysex().\nAC:L - The attacker owns both sides of the race \u2014 two threads (or a concurrent SNDCTL_SEQ_RESET ioctl) hammering write() on the same file descriptor \u2014 and can retry the tight loop indefinitely until the unserialized dest/len window is hit. No condition outside the attacker's control is required.\nPR:L - Neither odev_open() nor the write path performs any capability check; only the device file permissions apply, and desktop udev/logind grant the logged-in unprivileged user access to /dev/sequencer and /dev/snd/seq (audio group / uaccess ACL). The attacker can even self-provision the required MIDI device by creating a MIDI_GENERIC sequencer port as an unprivileged user.\nUI:N - The attacker triggers the race entirely from its own threads via open/write/ioctl; no victim action, no file to be opened by another user, and no administrator step is involved.\nS:U - The corruption stays inside the kernel's own heap and security authority \u2014 a standard local kernel memory-safety bug with no VM, IOMMU, or sandbox boundary crossed.\nC:H - The race yields slab out-of-bounds access on a kmalloc'd object and, via the concurrent kfree() of info->sysex in the reset path, use-after-free access to freed heap memory; such heap corruption/UAF primitives are leverageable for kernel memory disclosure, and the SysEx event is dispatched with a racily-read length/pointer to a buffer the attacker can read back through the sequencer.\nI:H - This is an out-of-bounds heap *write* of fully attacker-chosen bytes past the 136-byte seq_oss_synth_sysex object (extendable further via chained lost-update races on the unlocked len++), plus a potential UAF write, which is the classic basis for heap grooming and control-flow hijack leading to privilege escalation.\nA:H - The out-of-bounds/use-after-free write reliably produces slab corruption and KASAN/SLUB-redzone-detected faults, and an unprivileged local user can repeat it in a loop to panic or destabilize the kernel."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["sound/core/seq/oss/seq_oss_synth.c"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "cff1de87ed14fc0f2332213d2367100e7ad0753a", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "d2392b79d8af3714ea8878b71c66dc49d3110f44", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "9d382112b36382aa65aad765f189ebde9926c101", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "0179488ca992d79908b8e26b9213f1554fc5bacc", "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/core/seq/oss/seq_oss_synth.c"], "versions": [{"version": "2.6.12", "status": "affected"}, {"version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.124", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.70", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.9", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.13", "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": "2.6.12", "versionEndExcluding": "6.1.124"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.6.70"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.12.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.13"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/cff1de87ed14fc0f2332213d2367100e7ad0753a"}, {"url": "https://git.kernel.org/stable/c/d2392b79d8af3714ea8878b71c66dc49d3110f44"}, {"url": "https://git.kernel.org/stable/c/9d382112b36382aa65aad765f189ebde9926c101"}, {"url": "https://git.kernel.org/stable/c/0179488ca992d79908b8e26b9213f1554fc5bacc"}], "title": "ALSA: seq: oss: Fix races at processing SysEx messages", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T20:55:07.270Z"}}]}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["sound/core/seq/oss/seq_oss_synth.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "cff1de87ed14fc0f2332213d2367100e7ad0753a", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "d2392b79d8af3714ea8878b71c66dc49d3110f44", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "9d382112b36382aa65aad765f189ebde9926c101", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "0179488ca992d79908b8e26b9213f1554fc5bacc", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["sound/core/seq/oss/seq_oss_synth.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.12"}, {"lessThan": "2.6.12", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.124", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.70", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.9", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.13", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "5D05F571-95D3-4BED-898B-B46FFC88EA32", "versionEndExcluding": "6.1.124", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "51E6CFF2-92AA-4936-95AB-2D068168A696", "versionEndExcluding": "6.6.70", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "1D13AF97-FFED-4B68-906D-CFE38D0B88DD", "versionEndExcluding": "6.12.9", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*", "matchCriteriaId": "62567B3C-6CEE-46D0-BC2E-B3717FBF7D13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:*", "matchCriteriaId": "5A073481-106D-4B15-B4C7-FB0213B8E1D4", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc3:*:*:*:*:*:*", "matchCriteriaId": "DE491969-75AE-4A6B-9A58-8FC5AF98798F", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc4:*:*:*:*:*:*", "matchCriteriaId": "93C0660D-7FB8-4FBA-892A-B064BA71E49E", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc5:*:*:*:*:*:*", "matchCriteriaId": "034C36A6-C481-41F3-AE9A-D116E5BE6895", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: seq: oss: Fix races at processing SysEx messages\n\nOSS sequencer handles the SysEx messages split in 6 bytes packets, and\nALSA sequencer OSS layer tries to combine those. It stores the data\nin the internal buffer and this access is racy as of now, which may\nlead to the out-of-bounds access.\n\nAs a temporary band-aid fix, introduce a mutex for serializing the\nprocess of the SysEx message packets."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ALSA: seq: oss: Se corrigen las ejecuciones al procesar mensajes SysEx El secuenciador OSS gestiona los mensajes SysEx divididos en paquetes de 6 bytes y la capa OSS del secuenciador ALSA intenta combinarlos. Almacena los datos en el b\u00fafer interno y este acceso es acelerado a partir de ahora, lo que puede llevar al acceso fuera de los l\u00edmites. Como soluci\u00f3n temporal, introduzca un mutex para serializar el proceso de los paquetes de mensajes SysEx."}], "id": "CVE-2024-57893", "lastModified": "2026-08-04T11:22:30.090", "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": 6.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-01-15T13:15:13.820", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0179488ca992d79908b8e26b9213f1554fc5bacc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9d382112b36382aa65aad765f189ebde9926c101"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cff1de87ed14fc0f2332213d2367100e7ad0753a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d2392b79d8af3714ea8878b71c66dc49d3110f44"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-362"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: ALSA: seq: oss: Fix races at processing SysEx messages", "id": "2338210", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2338210"}, "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"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nALSA: seq: oss: Fix races at processing SysEx messages\nOSS sequencer handles the SysEx messages split in 6 bytes packets, and\nALSA sequencer OSS layer tries to combine those. It stores the data\nin the internal buffer and this access is racy as of now, which may\nlead to the out-of-bounds access.\nAs a temporary band-aid fix, introduce a mutex for serializing the\nprocess of the SysEx message packets."], "name": "CVE-2024-57893", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "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": "2025-01-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-57893\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-57893\nhttps://lore.kernel.org/linux-cve-announce/2025011513-CVE-2024-57893-b263@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-07-13T11:30:58.573405+00:00", "updated": "2025-07-13T11:30:58.573464+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}