CVE-2026-46146

System hang via malformed USB audio descriptor

Published May 28, 2026 · Updated May 28, 2026

Denial of service in affected Linux Kernel releases allows local users to hang the system via a malformed USB audio descriptor. In convert_chmap_v3() within sound/usb/stream.c, the parser advances its loop by cs_desc->wLength without first rejecting an undersized length. Exploitation requires local access and presentation of the malformed descriptor; a zero-length increment prevents loop progress and interrupts system availability.

CVSS severity5.5
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in affected Linux Kernel releases allows local users to hang the system via a malformed USB audio descriptor. In convert_chmap_v3() within sound/usb/stream.c, the parser advances its loop by cs_desc->wLength without first rejecting an undersized length. Exploitation requires local access and presentation of the malformed descriptor; a zero-length increment prevents loop progress and interrupts system availability.

The record

CVE
CVE-2026-46146
Published
May 28, 2026
Updated
May 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-835, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 28, 2026CVE publishedPublication date reported by the CVE source.
  2. May 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1034719fdefd26caeec0a44a868bb5a412c2c1a5 <e0e3dcf48189603f3865f1a0b799b3b42baae96d
  2. Affected versionversion=275e37532e8ebe25e8a4069b2d9f955bfd202a46
  3. Affected versionversion=47ab3d820cb0a502bd0074f83bb3cf7ab5d79902
  4. Affected versionversion=5.10.241 <5.11
  5. Affected versionversion=5.15.190 <5.16
  6. Affected versionversion=5.4.297 <5.5
  7. Affected versionversion=6.1.149 <6.2
  8. Affected versionversion=6.12.43 <6.12.88
  9. Affected versionversion=6.15.11 <6.16
  10. Affected versionversion=6.16.2 <6.17
  11. Affected versionversion=6.17
  12. Affected versionversion=6.6.103 <6.6.140
  13. Affected versionversion=786571b10b1ae6d90e1242848ce78ee7e1d493c4
  14. Affected versionversion=799c06ad4c9c790c265e8b6b94947213f1fb389c
  15. Affected versionversion=7ef3fd250f84494fb2f7871f357808edaa1fc6ce
  16. Affected versionversion=ae17b3b5e753efc239421d186cd1ff06e5ac296e <4e0ee232ebe3df04874125d7c7f3e6c25ea5483d
  17. Affected versionversion=dfdcbcde5c20df878178245d4449feada7d5b201
  18. Affected versionversion=ecfd41166b72b67d3bdeb88d224ff445f6163869 <6e7247d8f5fefeceb0bb9cc80a5388a636b219cd
  19. Affected versionversion=ecfd41166b72b67d3bdeb88d224ff445f6163869 <be09b47ed8677d76962e3240c145502e2ad9f3c8
  20. Affected versionversion=ecfd41166b72b67d3bdeb88d224ff445f6163869 <fa5b19ce69067874b1413f3c2027563bae8c2cb3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1034719fdefd26caeec0a44a868bb5a412c2c1a5 <e0e3dcf48189603f3865f1a0b799b3b42baae96d; version=275e37532e8ebe25e8a4069b2d9f955bfd202a46; version=47ab3d820cb0a502bd0074f83bb3cf7ab5d79902; version=5.10.241 <5.11; version=5.15.190 <5.16; version=5.4.297 <5.5; version=6.1.149 <6.2; version=6.12.43 <6.12.88; version=6.15.11 <6.16; version=6.16.2 <6.17; version=6.17; version=6.6.103 <6.6.140; version=786571b10b1ae6d90e1242848ce78ee7e1d493c4; version=799c06ad4c9c790c265e8b6b94947213f1fb389c; version=7ef3fd250f84494fb2f7871f357808edaa1fc6ce; version=ae17b3b5e753efc239421d186cd1ff06e5ac296e <4e0ee232ebe3df04874125d7c7f3e6c25ea5483d; version=dfdcbcde5c20df878178245d4449feada7d5b201; version=ecfd41166b72b67d3bdeb88d224ff445f6163869 <6e7247d8f5fefeceb0bb9cc80a5388a636b219cd; version=ecfd41166b72b67d3bdeb88d224ff445f6163869 <be09b47ed8677d76962e3240c145502e2ad9f3c8; version=ecfd41166b72b67d3bdeb88d224ff445f6163869 <fa5b19ce69067874b1413f3c2027563bae8c2cb3

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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