ASoC: SOF: ipc4-topology: Fix shift-out-of-bounds for aggregated ALH capture

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-99182
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-28 11:17:39 UTC
Updated2026-10-28 11:17:39 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ASoC: SOF: ipc4-topology: Fix shift-out-of-bounds for aggregated ALH capture When ch_count is smaller than blob->alh_cfg.device_count (e.g. a mono capture stream, such as a SmartMic, aggregated across multiple SDW links), step = ch_count / blob->alh_cfg.device_count truncates to 0. The subsequent GENMASK(step - 1, 0) then underflows step - 1 (u32) to UINT_MAX, causing GENMASK()'s internal shift to use an out-of-bounds exponent: UBSAN: shift-out-of-bounds in sound/soc/sof/ipc4-topology.c:2363:13 shift exponent 18446744069414584384 is too large for 64-bit type 'long unsigned int' Treat ch_count < device_count the same way as the existing "channels equal to output reference channels" case: apply the same ch_mask to every aggregated device instead of trying to split channels that can't be evenly divided.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 0390a102cc18cb7456d6c1f15ac51f1af90fcf9c cad63a7798d6a6cac1fc68732595f0a3278ff6f0 git Not specified
CNA Linux Linux affected 0390a102cc18cb7456d6c1f15ac51f1af90fcf9c 5e1322787c5e424a570e87c8c2c25e37552cbe3b git Not specified
CNA Linux Linux affected 0390a102cc18cb7456d6c1f15ac51f1af90fcf9c 746de48c3a250f0c264105dcbfcdf0c5001e970b git Not specified
CNA Linux Linux affected 6.3 Not specified
CNA Linux Linux unaffected 6.3 semver Not specified
CNA Linux Linux unaffected 6.18.59 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.13 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/746de48c3a250f0c264105dcbfcdf0c5001e970b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5e1322787c5e424a570e87c8c2c25e37552cbe3b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/cad63a7798d6a6cac1fc68732595f0a3278ff6f0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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