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Linux KernelOperating system · Linux

CVE-2026-46018

MEDIUM · 5.5 CVSS v3.1 Published 2026-05-27
Fix available
A fix is available. Upgrade to 3.1 / 5.10.258 or later.
See remediation →
57/100
Remediation priority · Elevated
Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
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.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Linux KernelOperating system
Affected:>= 3.0.81, < 3.1>= 3.2.47, < 5.10.258>= 5.11, < 5.15.209>= 5.16, < 6.1.175>= 6.2, < 6.6.140>= 6.7, < 6.12.86>= 6.13, < 6.18.27>= 6.19, < 7.0.4

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 3.1 / 5.10.258 / 5.15.209 or later
Fixed in 3.15.10.2585.15.209
Vendor patch git.kernel.org →
Recommended fix High confidence

Linux kernel >= 6.1.175 (or >= 5.15.209, >= 5.10.258 depending on which stable branch is applicable)

  1. 1. Apply the kernel patch from commit 0da05fedf5e1966b7e7d389866cb86fcf09f4b32 to the affected kernel source code
  2. 2. The patch modifies the parse_uac2_sample_rate_range() function in sound/usb/clock.c (or similar ALSA usb-audio driver file)
  3. 3. Ensure the fix stops the entire parse loop when MAX_NR_RATES is reached, rather than just breaking out of the current rate loop
  4. 4. Recompile the kernel with the fix applied
  5. 5. Reboot the system with the patched kernel
Caveat Kernel upgrades may require rebuilding other kernel modules; ensure driver compatibility with the target kernel version

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,600. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-46018 in production — separate from our analysis above.

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What this is

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What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
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