Medium severity · published May 27, 2026
CVE-2026-46018
ALSA: usb-audio: stop parsing UAC2 rates at MAX_NR_RATES
5.5
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 8% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
3.0.81 before 3.1; 3.2.47 before 5.10.258; 5.11 before 5.15.209; 5.16 before 6.1.175; 6.2 before 6.6.140; 6.7 before 6.12.86; +2 more · source: NVD
LI
Linux · Linux
4fa0e81b83503900be277e6273a79651b375e288 before 5436bc1b07d4656f99412dc72871d250d7d55205; 4fa0e81b83503900be277e6273a79651b375e288 before 0da05fedf5e1966b7e7d389866cb86fcf09f4b32; 4fa0e81b83503900be277e6273a79651b375e288 before f14bd323eec4b4f0ef662520ec852e593ece1d4c; 4fa0e81b83503900be277e6273a79651b375e288 before ab5ba9fd138758ddc50222264ff246b31e397abf; 4fa0e81b83503900be277e6273a79651b375e288 before ba036305323814ec1f8655313b2fa6a0f7048716; 4fa0e81b83503900be277e6273a79651b375e288 before 4d7893a137eadb6163ea4298bf67d74b811d76ef; +7 more · source: vendor
SS
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem · Siemens
0 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-46018
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-46018
Patch
https://git.kernel.org/stable/c/0da05fedf5e1966b7e7d389866cb86fcf09f4b32
Patch
https://git.kernel.org/stable/c/3c318f97dcc50b2e0556a1813bd6958678e881fd
Patch
https://git.kernel.org/stable/c/4d7893a137eadb6163ea4298bf67d74b811d76ef
Patch
https://git.kernel.org/stable/c/5436bc1b07d4656f99412dc72871d250d7d55205
Patch
https://git.kernel.org/stable/c/a0b78639ef09b2e77974a3de3b1c07f6de3c5e56
Patch
https://git.kernel.org/stable/c/ab5ba9fd138758ddc50222264ff246b31e397abf
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