{"id":"CVE-2025-68753","state":"PUBLISHED","title":"ALSA: firewire-motu: add bounds check in put_user loop for DSP events","description":"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().","publishedAt":"2026-01-05T09:32:27.029Z","updatedAt":"2026-10-19T18:05:06.414Z","severity":{"score":7.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"634ec0b2906efd46f6f57977e172aa3470aca432","status":"affected","lessThan":"ea2c921d9de6e32ca50cb817b9d57bb881be70de","versionType":"git"},{"version":"634ec0b2906efd46f6f57977e172aa3470aca432","status":"affected","lessThan":"6d4f17782ce4facf3197e79707df411ee3d7b30a","versionType":"git"},{"version":"634ec0b2906efd46f6f57977e172aa3470aca432","status":"affected","lessThan":"0d71b3c2ed742f1ccb3b0b7a61afb90c0251093f","versionType":"git"},{"version":"634ec0b2906efd46f6f57977e172aa3470aca432","status":"affected","lessThan":"df692cf2b601a54b34edfdb9e683d67483aa8ce1","versionType":"git"},{"version":"634ec0b2906efd46f6f57977e172aa3470aca432","status":"affected","lessThan":"8f9e51cf2a2a43d0cd72d3dc0b5ccea3f639c187","versionType":"git"},{"version":"634ec0b2906efd46f6f57977e172aa3470aca432","status":"affected","lessThan":"298e753880b6ea99ac30df34959a7a03b0878eed","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/firewire/motu/motu-hwdep.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.16","versionType":"semver"},{"version":"6.1.160","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.120","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.63","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.13","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18.2","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/firewire/motu/motu-hwdep.c"]}],"references":["https://git.kernel.org/stable/c/ea2c921d9de6e32ca50cb817b9d57bb881be70de","https://git.kernel.org/stable/c/6d4f17782ce4facf3197e79707df411ee3d7b30a","https://git.kernel.org/stable/c/0d71b3c2ed742f1ccb3b0b7a61afb90c0251093f","https://git.kernel.org/stable/c/df692cf2b601a54b34edfdb9e683d67483aa8ce1","https://git.kernel.org/stable/c/8f9e51cf2a2a43d0cd72d3dc0b5ccea3f639c187","https://git.kernel.org/stable/c/298e753880b6ea99ac30df34959a7a03b0878eed"],"weaknesses":["CWE-787"],"ingestedAt":"2026-10-29T20:09:56.034Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/68xxx/CVE-2025-68753.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-68753","state":"PUBLISHED","datePublished":"2026-01-05T09:32:27.029Z","dateUpdated":"2026-10-19T18:05:06.414Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-12-24T10:30:51.033Z"},"containers":{"cna":{"title":"ALSA: firewire-motu: add bounds check in put_user loop for DSP events","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()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"634ec0b2906efd46f6f57977e172aa3470aca432","status":"affected","lessThan":"ea2c921d9de6e32ca50cb817b9d57bb881be70de","versionType":"git"},{"version":"634ec0b2906efd46f6f57977e172aa3470aca432","status":"affected","lessThan":"6d4f17782ce4facf3197e79707df411ee3d7b30a","versionType":"git"},{"version":"634ec0b2906efd46f6f57977e172aa3470aca432","status":"affected","lessThan":"0d71b3c2ed742f1ccb3b0b7a61afb90c0251093f","versionType":"git"},{"version":"634ec0b2906efd46f6f57977e172aa3470aca432","status":"affected","lessThan":"df692cf2b601a54b34edfdb9e683d67483aa8ce1","versionType":"git"},{"version":"634ec0b2906efd46f6f57977e172aa3470aca432","status":"affected","lessThan":"8f9e51cf2a2a43d0cd72d3dc0b5ccea3f639c187","versionType":"git"},{"version":"634ec0b2906efd46f6f57977e172aa3470aca432","status":"affected","lessThan":"298e753880b6ea99ac30df34959a7a03b0878eed","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/firewire/motu/motu-hwdep.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.16","versionType":"semver"},{"version":"6.1.160","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.120","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.63","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.13","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18.2","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/firewire/motu/motu-hwdep.c"]}],"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"}],"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."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-05T12:11:20.020Z"},"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"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2025-68753","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-10-16T15:05:07.065721Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-787","lang":"en","type":"CWE","description":"CWE-787 Out-of-bounds Write"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-19T18:05:06.414Z"}}]}}}