CVE-2026-99182
Full vulnerability record from the local CVENow database.
Description
In 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.
View original CVE JSON
{
"id": "CVE-2026-99182",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-10-28T11:17:39.003",
"lastModified": "2026-10-28T11:17:39.003",
"vulnStatus": "Received",
"cveTags": [],
"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."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"sound/soc/sof/ipc4-topology.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "0390a102cc18cb7456d6c1f15ac51f1af90fcf9c",
"lessThan": "cad63a7798d6a6cac1fc68732595f0a3278ff6f0",
"versionType": "git",
"status": "affected"
},
{
"version": "0390a102cc18cb7456d6c1f15ac51f1af90fcf9c",
"lessThan": "5e1322787c5e424a570e87c8c2c25e37552cbe3b",
"versionType": "git",
"status": "affected"
},
{
"version": "0390a102cc18cb7456d6c1f15ac51f1af90fcf9c",
"lessThan": "746de48c3a250f0c264105dcbfcdf0c5001e970b",
"versionType": "git",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"sound/soc/sof/ipc4-topology.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "6.3",
"status": "affected"
},
{
"version": "0",
"lessThan": "6.3",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.59",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.2.13",
"lessThanOrEqual": "7.2.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.3",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {},
"references": [
{
"url": "https://git.kernel.org/stable/c/5e1322787c5e424a570e87c8c2c25e37552cbe3b",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/746de48c3a250f0c264105dcbfcdf0c5001e970b",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/cad63a7798d6a6cac1fc68732595f0a3278ff6f0",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}