{"api_version":"1","generated_at":"2026-10-28T23:35:54+00:00","cve":"CVE-2026-99182","urls":{"html":"https://cve.report/CVE-2026-99182","api":"https://cve.report/api/cve/CVE-2026-99182.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-99182","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-99182"},"summary":{"title":"ASoC: SOF: ipc4-topology: Fix shift-out-of-bounds for aggregated ALH capture","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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-28 11:17:39","updated_at":"2026-10-28 11:17:39"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/746de48c3a250f0c264105dcbfcdf0c5001e970b","name":"https://git.kernel.org/stable/c/746de48c3a250f0c264105dcbfcdf0c5001e970b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5e1322787c5e424a570e87c8c2c25e37552cbe3b","name":"https://git.kernel.org/stable/c/5e1322787c5e424a570e87c8c2c25e37552cbe3b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/cad63a7798d6a6cac1fc68732595f0a3278ff6f0","name":"https://git.kernel.org/stable/c/cad63a7798d6a6cac1fc68732595f0a3278ff6f0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-99182","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-99182","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0390a102cc18cb7456d6c1f15ac51f1af90fcf9c cad63a7798d6a6cac1fc68732595f0a3278ff6f0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0390a102cc18cb7456d6c1f15ac51f1af90fcf9c 5e1322787c5e424a570e87c8c2c25e37552cbe3b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0390a102cc18cb7456d6c1f15ac51f1af90fcf9c 746de48c3a250f0c264105dcbfcdf0c5001e970b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.3","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.3 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.59 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.13 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["sound/soc/sof/ipc4-topology.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"cad63a7798d6a6cac1fc68732595f0a3278ff6f0","status":"affected","version":"0390a102cc18cb7456d6c1f15ac51f1af90fcf9c","versionType":"git"},{"lessThan":"5e1322787c5e424a570e87c8c2c25e37552cbe3b","status":"affected","version":"0390a102cc18cb7456d6c1f15ac51f1af90fcf9c","versionType":"git"},{"lessThan":"746de48c3a250f0c264105dcbfcdf0c5001e970b","status":"affected","version":"0390a102cc18cb7456d6c1f15ac51f1af90fcf9c","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["sound/soc/sof/ipc4-topology.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.3"},{"lessThan":"6.3","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.59","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.13","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.59","versionStartIncluding":"6.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.13","versionStartIncluding":"6.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"6.3","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-10-28T10:35:35.193Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/cad63a7798d6a6cac1fc68732595f0a3278ff6f0"},{"url":"https://git.kernel.org/stable/c/5e1322787c5e424a570e87c8c2c25e37552cbe3b"},{"url":"https://git.kernel.org/stable/c/746de48c3a250f0c264105dcbfcdf0c5001e970b"}],"title":"ASoC: SOF: ipc4-topology: Fix shift-out-of-bounds for aggregated ALH capture","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-99182","datePublished":"2026-10-28T10:35:35.193Z","dateReserved":"2026-09-25T10:25:14.399Z","dateUpdated":"2026-10-28T10:35:35.193Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-28 11:17:39","lastModifiedDate":"2026-10-28 11:17:39","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"99182","Ordinal":"1","Title":"ASoC: SOF: ipc4-topology: Fix shift-out-of-bounds for aggregated","CVE":"CVE-2026-99182","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"99182","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"ASoC: SOF: ipc4-topology: Fix shift-out-of-bounds for aggregated"}]}}}