CVE Intelligence
Medium Denial of service

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

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.

Published May 28, 2026 · Updated Oct 14, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: Linux

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.
How the score was calculated
  • EPSS 0.2% (30-day exploitation probability)+1
  • Technical severity (medium)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation
Not confirmed
Not in CISA KEV — an absence of record, not proof it is unexploited.
EPSS FIRST
0.16%
ahead of 5% of scored CVEs · Oct 14, 2026
Affects
Linux
Linux and 1 more
CVSS base
5.5
Medium · 2 source(s)

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

  • Documented patch — git.kernel.org (NIST National Vulnerability Database)
  • Documented patch — git.kernel.org (NIST National Vulnerability Database)
  • Documented patch — git.kernel.org (NIST National Vulnerability Database)
  • Documented patch — git.kernel.org (NIST National Vulnerability Database)
  • Documented patch — git.kernel.org (NIST National Vulnerability Database)
  • Documented patch — git.kernel.org (NIST National Vulnerability Database)
  • Documented patch — git.kernel.org (NIST National Vulnerability Database)
  • Documented patch — git.kernel.org (NIST National Vulnerability Database)

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

  1. Identify exposed assets running the affected vendor/product/version combinations (Linux Linux, Linux Linux Kernel).
  2. Apply the fixed version or the patch documented under Remediation.
  3. Search available logs for exploit probes matching the vulnerability class (denial of service), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

VendorProductVersionsStatusSource
Linux Linux ≥ 5.10.241 and < 5.10.258≥ 47ab3d820cb0a502bd0074f83bb3cf7ab5d79902 and < 24a40df79307ca7ca0eec0889361cf6ac146d72a≥ 1034719fdefd26caeec0a44a868bb5a412c2c1a5 and < e0e3dcf48189603f3865f1a0b799b3b42baae96d≥ ae17b3b5e753efc239421d186cd1ff06e5ac296e and < 4e0ee232ebe3df04874125d7c7f3e6c25ea5483d≥ ecfd41166b72b67d3bdeb88d224ff445f6163869 and < be09b47ed8677d76962e3240c145502e2ad9f3c8≥ ecfd41166b72b67d3bdeb88d224ff445f6163869 and < fa5b19ce69067874b1413f3c2027563bae8c2cb3≥ ecfd41166b72b67d3bdeb88d224ff445f6163869 and < 6e7247d8f5fefeceb0bb9cc80a5388a636b219cdversion 799c06ad4c9c790c265e8b6b94947213f1fb389c
and 12 more version dfdcbcde5c20df878178245d4449feada7d5b201version 7ef3fd250f84494fb2f7871f357808edaa1fc6ce≥ 275e37532e8ebe25e8a4069b2d9f955bfd202a46 and < 316aa0b1e3c5600eae5ab876394c1ac70e6db581≥ 5.15.190 and < 5.15.209≥ 6.1.149 and < 6.1.175≥ 6.6.103 and < 6.6.140≥ 6.12.43 and < 6.12.88≥ 5.4.297 and < 5.5≥ 6.15.11 and < 6.16≥ 6.16.2 and < 6.17version 6.17≥ 786571b10b1ae6d90e1242848ce78ee7e1d493c4 and < 076d5d13eb9c1ad259a7f246149f6676c62285f9
Vulnerable CVE Program (cve.org) e CISA ADP
Linux Linux Kernel ≥ 5.10.241 and < 5.10.258≥ 5.4.297 and < 5.5≥ 5.15.190 and < 5.15.209≥ 6.1.149 and < 6.1.175≥ 6.6.103 and < 6.6.140≥ 6.12.43 and < 6.12.88≥ 6.15.11 and < 6.16≥ 6.16.2 and < 6.17
and 10 more ≥ 6.17.1 and < 6.18.30≥ 6.19 and < 7.0.7version 6.17version 6.17-rc2version 6.17-rc3version 6.17-rc4version 6.17-rc5version 6.17-rc6version 6.17-rc7version 7.1-rc1
Vulnerable NIST National Vulnerability Database

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

ScoreVersionSeverityExpl.ImpactScored by
5.5 CVSS 3.1 Medium 1.8 3.6 nvd@nist.gov via NIST National Vulnerability Database
5.5 CVSS 3.1 Medium — — GitHub, Inc. via GitHub Security Advisories
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H (score shown at the top: nvd@nist.gov)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-835 · Infinite Loop

Other CVEs with this weakness →

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 0.16%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

  • Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.
  • Track CPU/memory spikes and availability drops correlated with request patterns.
endpoint telemetry (EDR)resource metrics

Timeline

What happened to this CVE, newest first.

  • 2026
  • Source status changed · Analyzed → Modified
    Oct 14, 2026 · NIST National Vulnerability Database
  • Affected products added · linux/linux
    Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
  • Record published
    Oct 13, 2026
  • Fix documented
    Oct 13, 2026 · NIST National Vulnerability Database
  • CVSS changed · 5.5
    Oct 13, 2026 · NIST National Vulnerability Database
  • Source status changed · → Analyzed
    Oct 13, 2026 · NIST National Vulnerability Database
  • Record created in this database
    Oct 13, 2026 · NIST National Vulnerability Database
  • CVE published
    May 28, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

  • 2× References added · Oct 14, 2026 – Oct 14, 2026
  • 1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

11 on the record

Elsewhere on this site

Linux
every CVE for this vendor
Denial of service
same class
CWE-835
other pages naming this weakness

Related CVEs (same products)

  • CVE-2026-99999 ipv4: validate checksum_start before completing checksum 8h
  • CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 8h
  • CVE-2026-98424 wifi: cfg80211: undo netns switch if renaming the wiphy fails 1d
  • CVE-2026-98425 wifi: mac80211: don't warn when an IBSS has no channel to scan 1d
  • CVE-2026-98426 wifi: mwifiex: fix IRQ leak using wrong index in MSI-X error path 1d
  • CVE-2026-98427 net/sched: codel: bound the dropping loop per dequeue call 1d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No CISA SSVC assessment.
  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-46146 is "ALSA: usb-audio: Avoid potential endless loop in convert_chmap_v3()", rated Medium. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 5.5 describes technical severity. EPSS 0.16% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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