{"id":"CVE-2025-68783","state":"PUBLISHED","title":"ALSA: usb-mixer: us16x08: validate meter packet indices","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-mixer: us16x08: validate meter packet indices\n\nget_meter_levels_from_urb() parses the 64-byte meter packets sent by\nthe device and fills the per-channel arrays meter_level[],\ncomp_level[] and master_level[] in struct snd_us16x08_meter_store.\n\nCurrently the function derives the channel index directly from the\nmeter packet (MUB2(meter_urb, s) - 1) and uses it to index those\narrays without validating the range. If the packet contains a\nnegative or out-of-range channel number, the driver may write past\nthe end of these arrays.\n\nIntroduce a local channel variable and validate it before updating the\narrays. We reject negative indices, limit meter_level[] and\ncomp_level[] to SND_US16X08_MAX_CHANNELS, and guard master_level[]\nupdates with ARRAY_SIZE(master_level).","publishedAt":"2026-01-13T15:28:57.609Z","updatedAt":"2026-05-11T21:53:16.125Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"d2bb390a2081a36ffe906724d2848d846f2aeb29","status":"affected","lessThan":"53461710a95e15ac1f6542450943a492ecf8e550","versionType":"git"},{"version":"d2bb390a2081a36ffe906724d2848d846f2aeb29","status":"affected","lessThan":"2168866396bd28ec4f3c8da0fbc7d08b5bd4f053","versionType":"git"},{"version":"d2bb390a2081a36ffe906724d2848d846f2aeb29","status":"affected","lessThan":"cde47f4ccad6751ac36b7471572ddf38ee91870c","versionType":"git"},{"version":"d2bb390a2081a36ffe906724d2848d846f2aeb29","status":"affected","lessThan":"2f21a7cbaaa93926f5be15bc095b9c57c35748d9","versionType":"git"},{"version":"d2bb390a2081a36ffe906724d2848d846f2aeb29","status":"affected","lessThan":"a8ad320efb663be30b794e3dd3e829301c0d0ed3","versionType":"git"},{"version":"d2bb390a2081a36ffe906724d2848d846f2aeb29","status":"affected","lessThan":"eaa95228b8a56c4880a182c0350d67922b22408f","versionType":"git"},{"version":"d2bb390a2081a36ffe906724d2848d846f2aeb29","status":"affected","lessThan":"5526c1c6ba1d0913c7dfcbbd6fe1744ea7c55f1e","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/usb/mixer_us16x08.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.11","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.11","versionType":"semver"},{"version":"5.10.248","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.198","status":"unaffected","lessThanOrEqual":"5.15.*","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":"6.12.64","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.3","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/usb/mixer_us16x08.c"]}],"references":["https://git.kernel.org/stable/c/53461710a95e15ac1f6542450943a492ecf8e550","https://git.kernel.org/stable/c/2168866396bd28ec4f3c8da0fbc7d08b5bd4f053","https://git.kernel.org/stable/c/cde47f4ccad6751ac36b7471572ddf38ee91870c","https://git.kernel.org/stable/c/2f21a7cbaaa93926f5be15bc095b9c57c35748d9","https://git.kernel.org/stable/c/a8ad320efb663be30b794e3dd3e829301c0d0ed3","https://git.kernel.org/stable/c/eaa95228b8a56c4880a182c0350d67922b22408f","https://git.kernel.org/stable/c/5526c1c6ba1d0913c7dfcbbd6fe1744ea7c55f1e"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:56.034Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/68xxx/CVE-2025-68783.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-68783","state":"PUBLISHED","datePublished":"2026-01-13T15:28:57.609Z","dateUpdated":"2026-05-11T21:53:16.125Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-12-24T10:30:51.036Z"},"containers":{"cna":{"title":"ALSA: usb-mixer: us16x08: validate meter packet indices","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-mixer: us16x08: validate meter packet indices\n\nget_meter_levels_from_urb() parses the 64-byte meter packets sent by\nthe device and fills the per-channel arrays meter_level[],\ncomp_level[] and master_level[] in struct snd_us16x08_meter_store.\n\nCurrently the function derives the channel index directly from the\nmeter packet (MUB2(meter_urb, s) - 1) and uses it to index those\narrays without validating the range. If the packet contains a\nnegative or out-of-range channel number, the driver may write past\nthe end of these arrays.\n\nIntroduce a local channel variable and validate it before updating the\narrays. We reject negative indices, limit meter_level[] and\ncomp_level[] to SND_US16X08_MAX_CHANNELS, and guard master_level[]\nupdates with ARRAY_SIZE(master_level)."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"d2bb390a2081a36ffe906724d2848d846f2aeb29","status":"affected","lessThan":"53461710a95e15ac1f6542450943a492ecf8e550","versionType":"git"},{"version":"d2bb390a2081a36ffe906724d2848d846f2aeb29","status":"affected","lessThan":"2168866396bd28ec4f3c8da0fbc7d08b5bd4f053","versionType":"git"},{"version":"d2bb390a2081a36ffe906724d2848d846f2aeb29","status":"affected","lessThan":"cde47f4ccad6751ac36b7471572ddf38ee91870c","versionType":"git"},{"version":"d2bb390a2081a36ffe906724d2848d846f2aeb29","status":"affected","lessThan":"2f21a7cbaaa93926f5be15bc095b9c57c35748d9","versionType":"git"},{"version":"d2bb390a2081a36ffe906724d2848d846f2aeb29","status":"affected","lessThan":"a8ad320efb663be30b794e3dd3e829301c0d0ed3","versionType":"git"},{"version":"d2bb390a2081a36ffe906724d2848d846f2aeb29","status":"affected","lessThan":"eaa95228b8a56c4880a182c0350d67922b22408f","versionType":"git"},{"version":"d2bb390a2081a36ffe906724d2848d846f2aeb29","status":"affected","lessThan":"5526c1c6ba1d0913c7dfcbbd6fe1744ea7c55f1e","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/usb/mixer_us16x08.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.11","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.11","versionType":"semver"},{"version":"5.10.248","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.198","status":"unaffected","lessThanOrEqual":"5.15.*","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":"6.12.64","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.3","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/usb/mixer_us16x08.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/53461710a95e15ac1f6542450943a492ecf8e550"},{"url":"https://git.kernel.org/stable/c/2168866396bd28ec4f3c8da0fbc7d08b5bd4f053"},{"url":"https://git.kernel.org/stable/c/cde47f4ccad6751ac36b7471572ddf38ee91870c"},{"url":"https://git.kernel.org/stable/c/2f21a7cbaaa93926f5be15bc095b9c57c35748d9"},{"url":"https://git.kernel.org/stable/c/a8ad320efb663be30b794e3dd3e829301c0d0ed3"},{"url":"https://git.kernel.org/stable/c/eaa95228b8a56c4880a182c0350d67922b22408f"},{"url":"https://git.kernel.org/stable/c/5526c1c6ba1d0913c7dfcbbd6fe1744ea7c55f1e"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:53:16.125Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"5.10.248"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"5.15.198"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.1.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.6.120"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.12.64"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.18.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.19"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}