VulnerabilityPublished 28 May 2026Updated 6 Nov 2026

CVE-2026-46146: Linux kernel · ALSA: usb-audio: Avoid potential endless loop in convert_chmap_v3()

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in fa5b19ce69067874b1413f3c2027563bae8c2cb3 : 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 fa5b19ce69067874b1413f3c2027563bae8c2cb3, e0e3dcf48189603f3865f1a0b799b3b42baae96d, be09b47ed8677d76962e3240c145502e2ad9f3c8 +13

Exploitation evidence

Disclosed: evidence found.
CVE published 28 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 >=5.10.241 <5.10.258 >=5.15.190 <5.15.209 >=6.1.149 <6.1.175 >=6.6.103 <6.6.140 >=6.12.43 <6.12.88 >=5.4.297 <5.5 >=6.15.11 <6.16 >=6.16.2 <6.17	Fixed in fa5b19ce69067874b1413f3c2027563bae8c2cb3 e0e3dcf48189603f3865f1a0b799b3b42baae96d be09b47ed8677d76962e3240c145502e2ad9f3c8 316aa0b1e3c5600eae5ab876394c1ac70e6db581 076d5d13eb9c1ad259a7f246149f6676c62285f9 24a40df79307ca7ca0eec0889361cf6ac146d72a 6e7247d8f5fefeceb0bb9cc80a5388a636b219cd 6.17 6.16 6.12.88 6.6.140 6.1.175 5.15.209 5.10.258 5.5 4e0ee232ebe3df04874125d7c7f3e6c25ea5483d
LinuxLinux	Affected =6.17	Fixed in–

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.

References

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