VulnerabilityPublished 27 May 2026Updated 6 Nov 2026

CVE-2026-46018: Linux kernel · ALSA: usb-audio: stop parsing UAC2 rates at MAX_NR_RATES

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in f14bd323eec4b4f0ef662520ec852e593ece1d4c : update Linux kernel when convenient.

Data as of 6 Nov 2026, 16:34 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch

Available – fixed in f14bd323eec4b4f0ef662520ec852e593ece1d4c, ba036305323814ec1f8655313b2fa6a0f7048716, ab5ba9fd138758ddc50222264ff246b31e397abf +7

Exploitation evidence

Disclosed: evidence found.
CVE published 27 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 6 Nov 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.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), 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 to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected >=3.0.81 <3.1 >=3.2.47 <3.3	Fixed in f14bd323eec4b4f0ef662520ec852e593ece1d4c ba036305323814ec1f8655313b2fa6a0f7048716 ab5ba9fd138758ddc50222264ff246b31e397abf a0b78639ef09b2e77974a3de3b1c07f6de3c5e56 5436bc1b07d4656f99412dc72871d250d7d55205 4d7893a137eadb6163ea4298bf67d74b811d76ef 3c318f97dcc50b2e0556a1813bd6958678e881fd 3.3 3.1 0da05fedf5e1966b7e7d389866cb86fcf09f4b32
LinuxLinux	Affected =3.3	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: stop parsing UAC2 rates at MAX_NR_RATES parse_uac2_sample_rate_range() caps the number of enumerated rates at MAX_NR_RATES, but it only breaks out of the current rate loop. A malformed UAC2 RANGE response with additional triplets continues parsing the remaining triplets and repeatedly prints "invalid uac2 rates" while probe still holds register_mutex. Stop the whole parse once the cap is reached and return the number of rates collected so far.

References

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