{"id":"CVE-2026-99182","published":"2026-10-28T11:17:39.003","lastModified":"2026-10-28T11:17:39.003","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.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/5e1322787c5e424a570e87c8c2c25e37552cbe3b","tags":[]},{"url":"https://git.kernel.org/stable/c/746de48c3a250f0c264105dcbfcdf0c5001e970b","tags":[]},{"url":"https://git.kernel.org/stable/c/cad63a7798d6a6cac1fc68732595f0a3278ff6f0","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}