Medium severity · published May 28, 2026
CVE-2026-46146
ALSA: usb-audio: Avoid potential endless loop in convert_chmap_v3()
5.5
CVSS
0.1%
EPSS
No
On KEV
Description
In the Linux kernel, the following vulnerability has been resolved:
ALSA: usb-audio: Avoid potential endless loop in convert_chmap_v3()
The convert_chmap_v3() has a loop with its increment size of
cs_desc->wLength, but we forgot to validate cs_desc->wLength itself,
which may lead to potential endless loop by a malformed descriptor.
Add a proper size check to abort the loop for plugging the hole.
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)0.1% · higher than 3% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
5.4.297 before 5.5; 5.10.241 before 5.10.258; 5.15.190 before 5.15.209; 6.1.149 before 6.1.175; 6.6.103 before 6.6.140; 6.12.43 before 6.12.88; +12 more · source: NVD
LI
Linux · Linux
786571b10b1ae6d90e1242848ce78ee7e1d493c4 before 076d5d13eb9c1ad259a7f246149f6676c62285f9; 275e37532e8ebe25e8a4069b2d9f955bfd202a46 before 316aa0b1e3c5600eae5ab876394c1ac70e6db581; 47ab3d820cb0a502bd0074f83bb3cf7ab5d79902 before 24a40df79307ca7ca0eec0889361cf6ac146d72a; 1034719fdefd26caeec0a44a868bb5a412c2c1a5 before e0e3dcf48189603f3865f1a0b799b3b42baae96d; ae17b3b5e753efc239421d186cd1ff06e5ac296e before 4e0ee232ebe3df04874125d7c7f3e6c25ea5483d; ecfd41166b72b67d3bdeb88d224ff445f6163869 before be09b47ed8677d76962e3240c145502e2ad9f3c8; +14 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-2026-46146
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-46146
Patch
https://git.kernel.org/stable/c/076d5d13eb9c1ad259a7f246149f6676c62285f9
Patch
https://git.kernel.org/stable/c/24a40df79307ca7ca0eec0889361cf6ac146d72a
Patch
https://git.kernel.org/stable/c/316aa0b1e3c5600eae5ab876394c1ac70e6db581
Patch
https://git.kernel.org/stable/c/4e0ee232ebe3df04874125d7c7f3e6c25ea5483d
Patch
https://git.kernel.org/stable/c/6e7247d8f5fefeceb0bb9cc80a5388a636b219cd
Patch
https://git.kernel.org/stable/c/be09b47ed8677d76962e3240c145502e2ad9f3c8
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