{"id":"CVE-2025-68783","summary":"ALSA: usb-mixer: us16x08: validate meter packet indices","details":"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).","modified":"2026-03-31T17:30:04.108003Z","published":"2026-01-13T15:28:57.609Z","related":["MGASA-2026-0017","MGASA-2026-0018","SUSE-SU-2026:0447-1","SUSE-SU-2026:0472-1","SUSE-SU-2026:0473-1","SUSE-SU-2026:0587-1","SUSE-SU-2026:20477-1","SUSE-SU-2026:20498-1","SUSE-SU-2026:20555-1","SUSE-SU-2026:20599-1","SUSE-SU-2026:20615-1","SUSE-SU-2026:20845-1","SUSE-SU-2026:20876-1","openSUSE-SU-2026:20287-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68783.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2168866396bd28ec4f3c8da0fbc7d08b5bd4f053"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2f21a7cbaaa93926f5be15bc095b9c57c35748d9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/53461710a95e15ac1f6542450943a492ecf8e550"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5526c1c6ba1d0913c7dfcbbd6fe1744ea7c55f1e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a8ad320efb663be30b794e3dd3e829301c0d0ed3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cde47f4ccad6751ac36b7471572ddf38ee91870c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/eaa95228b8a56c4880a182c0350d67922b22408f"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68783.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-68783"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"d2bb390a2081a36ffe906724d2848d846f2aeb29"},{"fixed":"53461710a95e15ac1f6542450943a492ecf8e550"},{"fixed":"2168866396bd28ec4f3c8da0fbc7d08b5bd4f053"},{"fixed":"cde47f4ccad6751ac36b7471572ddf38ee91870c"},{"fixed":"2f21a7cbaaa93926f5be15bc095b9c57c35748d9"},{"fixed":"a8ad320efb663be30b794e3dd3e829301c0d0ed3"},{"fixed":"eaa95228b8a56c4880a182c0350d67922b22408f"},{"fixed":"5526c1c6ba1d0913c7dfcbbd6fe1744ea7c55f1e"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-68783.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.11.0"},{"fixed":"5.10.248"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.198"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.160"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.120"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.64"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.3"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-68783.json"}}],"schema_version":"1.7.5"}