{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-68753", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-24T10:30:51.033Z", "datePublished": "2026-01-05T09:32:27.029Z", "dateUpdated": "2026-08-05T12:11:20.020Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:11:20.020Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: firewire-motu: add bounds check in put_user loop for DSP events\n\nIn the DSP event handling code, a put_user() loop copies event data.\nWhen the user buffer size is not aligned to 4 bytes, it could overwrite\nbeyond the buffer boundary.\n\nFix by adding a bounds check before put_user()." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H", "baseScore": 7.1, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The flaw is reached through a local read() on the MOTU ALSA hwdep device; there is no network-receive path, although a supported FireWire unit must be attached and streaming.\nAC:L - The caller can deterministically trigger the overrun by supplying a count greater than the 8-byte header but not divisible by four while a DSP event is queued. No race or condition outside the attacker's control is required.\nPR:L - No capability or authentication check exists in the hwdep path; the attacker only needs ordinary user access to the sound device, commonly granted through an active-seat ACL or audio-group membership.\nUI:N - The attacker can open the hwdep and PCM devices, start streaming, and issue the malformed read without action by another user.\nS:U - The overwrite affects memory associated with the local consuming process and does not cross a VM, IOMMU, container, or other security-authority boundary.\nC:N - The vulnerable operation only writes an initialized DSP event to userspace; it performs no out-of-bounds read and provides no kernel-memory disclosure primitive.\nI:H - The loop can write a complete 32-bit, device-influenced event when only one to three bytes remain, corrupting adjacent userspace control data. Under the required higher-severity treatment for an out-of-bounds write, integrity impact is High.\nA:H - The adjacent-memory corruption can terminate the consuming process or a critical audio or control service and can be triggered repeatedly. Under the required higher-severity treatment for any crash, availability impact is High." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "sound/firewire/motu/motu-hwdep.c" ], "versions": [ { "version": "634ec0b2906efd46f6f57977e172aa3470aca432", "lessThan": "ea2c921d9de6e32ca50cb817b9d57bb881be70de", "status": "affected", "versionType": "git" }, { "version": "634ec0b2906efd46f6f57977e172aa3470aca432", "lessThan": "6d4f17782ce4facf3197e79707df411ee3d7b30a", "status": "affected", "versionType": "git" }, { "version": "634ec0b2906efd46f6f57977e172aa3470aca432", "lessThan": "0d71b3c2ed742f1ccb3b0b7a61afb90c0251093f", "status": "affected", "versionType": "git" }, { "version": "634ec0b2906efd46f6f57977e172aa3470aca432", "lessThan": "df692cf2b601a54b34edfdb9e683d67483aa8ce1", "status": "affected", "versionType": "git" }, { "version": "634ec0b2906efd46f6f57977e172aa3470aca432", "lessThan": "8f9e51cf2a2a43d0cd72d3dc0b5ccea3f639c187", "status": "affected", "versionType": "git" }, { "version": "634ec0b2906efd46f6f57977e172aa3470aca432", "lessThan": "298e753880b6ea99ac30df34959a7a03b0878eed", "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/firewire/motu/motu-hwdep.c" ], "versions": [ { "version": "5.16", "status": "affected" }, { "version": "0", "lessThan": "5.16", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.160", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.120", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.63", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.17.13", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.2", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19", "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": "5.16", "versionEndExcluding": "6.1.160" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.6.120" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.12.63" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.17.13" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.18.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.19" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/ea2c921d9de6e32ca50cb817b9d57bb881be70de" }, { "url": "https://git.kernel.org/stable/c/6d4f17782ce4facf3197e79707df411ee3d7b30a" }, { "url": "https://git.kernel.org/stable/c/0d71b3c2ed742f1ccb3b0b7a61afb90c0251093f" }, { "url": "https://git.kernel.org/stable/c/df692cf2b601a54b34edfdb9e683d67483aa8ce1" }, { "url": "https://git.kernel.org/stable/c/8f9e51cf2a2a43d0cd72d3dc0b5ccea3f639c187" }, { "url": "https://git.kernel.org/stable/c/298e753880b6ea99ac30df34959a7a03b0878eed" } ], "title": "ALSA: firewire-motu: add bounds check in put_user loop for DSP events", "x_generator": { "engine": "bippy-1.2.0" } } } }