VulnerabilityPublished 28 Oct 2026

CVE-2026-99182: Linux kernel · ASoC: SOF: ipc4-topology: Fix shift-out-of-bounds for aggregated ALH capture

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in cad63a7798d6a6cac1fc68732595f0a3278ff6f0 : update Linux kernel when convenient.

Data as of 28 Oct 2026, 10:58 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

Patch: Available – fixed in cad63a7798d6a6cac1fc68732595f0a3278ff6f0, 746de48c3a250f0c264105dcbfcdf0c5001e970b, 5e1322787c5e424a570e87c8c2c25e37552cbe3b

Exploitation evidence

Disclosed: evidence found.
CVE published 28 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Linux kernel to cad63a7798d6a6cac1fc68732595f0a3278ff6f0, 746de48c3a250f0c264105dcbfcdf0c5001e970b or 5e1322787c5e424a570e87c8c2c25e37552cbe3b.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 0390a102cc18cb7456d6c1f15ac51f1af90fcf9c, < cad63a7798d6a6cac1fc68732595f0a3278ff6f0	Fixed in cad63a7798d6a6cac1fc68732595f0a3278ff6f0
LinuxLinux	Affected ≥ 0390a102cc18cb7456d6c1f15ac51f1af90fcf9c, < 746de48c3a250f0c264105dcbfcdf0c5001e970b	Fixed in 746de48c3a250f0c264105dcbfcdf0c5001e970b
LinuxLinux	Affected ≥ 0390a102cc18cb7456d6c1f15ac51f1af90fcf9c, < 5e1322787c5e424a570e87c8c2c25e37552cbe3b	Fixed in 5e1322787c5e424a570e87c8c2c25e37552cbe3b
LinuxLinux	Affected =6.3	Fixed in–
Debiandebian/linux`pkg:deb/debian/linux`Other threats	Affected =6.3	Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

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.

References

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