{"id":"CVE-2026-99182","aliases":[],"title":"ASoC: SOF: ipc4-topology: Fix shift-out-of-bounds for aggregated ALH capture","titleSource":"Linux","descriptionSource":"Linux","products":[{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"0390a102cc18cb7456d6c1f15ac51f1af90fcf9c","status":"affected","lessThan":"cad63a7798d6a6cac1fc68732595f0a3278ff6f0","versionType":"git"},{"version":"0390a102cc18cb7456d6c1f15ac51f1af90fcf9c","status":"affected","lessThan":"5e1322787c5e424a570e87c8c2c25e37552cbe3b","versionType":"git"},{"version":"0390a102cc18cb7456d6c1f15ac51f1af90fcf9c","status":"affected","lessThan":"746de48c3a250f0c264105dcbfcdf0c5001e970b","versionType":"git"}],"defaultStatus":"unaffected","source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-99182"},{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"6.3","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.3","versionType":"semver"},{"version":"6.18.59","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.13","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"defaultStatus":"affected","source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-99182"}],"remediation":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: SOF: ipc4-topology: Fix shift-out-of-bounds for aggregated ALH capture\n\nWhen ch_count is smaller than blob->alh_cfg.device_count (e.g. a mono\ncapture stream, such as a SmartMic, aggregated across multiple SDW\nlinks), step = ch_count / blob->alh_cfg.device_count truncates to 0.\nThe subsequent GENMASK(step - 1, 0) then underflows step - 1 (u32) to\nUINT_MAX, causing GENMASK()'s internal shift to use an out-of-bounds\nexponent:\n\n  UBSAN: shift-out-of-bounds in sound/soc/sof/ipc4-topology.c:2363:13\n  shift exponent 18446744069414584384 is too large for 64-bit type 'long unsigned int'\n\nTreat ch_count < device_count the same way as the existing \"channels\nequal to output reference channels\" case: apply the same ch_mask to\nevery aggregated device instead of trying to split channels that\ncan't be evenly divided.","severity":"unknown","score":null,"published":"2026-10-28T10:35:35.193Z","modified":"2026-10-28T10:35:35.193Z","withdrawn":false,"knownExploited":false,"affected":[],"references":["https://git.kernel.org/stable/c/cad63a7798d6a6cac1fc68732595f0a3278ff6f0","https://git.kernel.org/stable/c/5e1322787c5e424a570e87c8c2c25e37552cbe3b","https://git.kernel.org/stable/c/746de48c3a250f0c264105dcbfcdf0c5001e970b"],"sources":[{"name":"CVE","id":"CVE-2026-99182","modified":"2026-10-28T10:35:35.193Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-99182"}],"assessments":[],"sourceAffected":[],"kev":{"status":"not-listed","checkedAt":"2026-10-28T20:45:31.448Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}