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NVD / CVE Program· CNA Linux

CVE-2026-46018: ALSA: usb-audio: stop parsing UAC2 rates at MAX_NR_RATES

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.18% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 0da05fedf5e1966b7e7d389866cb86fcf09f4b32, 3.1, 3.3; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.141.1-1.

Low priority for now. Upgrade to Linux Linux 0da05fedf5e1966b7e7d389866cb86fcf09f4b32, 3.1, 3.3; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.141.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 27, 2026
Updated
Oct 15, 2026
EPSS
0.1% · 7th percentile
CWE
—

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel3.0.81 and later · before 3.1
  • linux linux kernel3.2.47 and later · before 5.10.258
  • linux linux kernel5.11 and later · before 5.15.209
  • linux linux kernel5.16 and later · before 6.1.175
  • linux linux kernel6.2 and later · before 6.6.140
  • linux linux kernel6.7 and later · before 6.12.86
  • linux linux kernel6.13 and later · before 6.18.27
  • linux linux kernel6.19 and later · before 7.0.4

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 44f059fb742aac78cffdab5e0d8fe0c9910c1ded, c25a53781f61c78bf2a2fa308bbd35b42ba346f6, 3.3affected
    • 4fa0e81b83503900be277e6273a79651b375e288 and later · before 5436bc1b07d4656f99412dc72871d250d7d55205affected · git
    • 4fa0e81b83503900be277e6273a79651b375e288 and later · before 0da05fedf5e1966b7e7d389866cb86fcf09f4b32affected · git
    • 4fa0e81b83503900be277e6273a79651b375e288 and later · before f14bd323eec4b4f0ef662520ec852e593ece1d4caffected · git
    • 4fa0e81b83503900be277e6273a79651b375e288 and later · before ab5ba9fd138758ddc50222264ff246b31e397abfaffected · git
    • 4fa0e81b83503900be277e6273a79651b375e288 and later · before ba036305323814ec1f8655313b2fa6a0f7048716affected · git
    • 4fa0e81b83503900be277e6273a79651b375e288 and later · before 4d7893a137eadb6163ea4298bf67d74b811d76efaffected · git
    • 4fa0e81b83503900be277e6273a79651b375e288 and later · before a0b78639ef09b2e77974a3de3b1c07f6de3c5e56affected · git
    • 4fa0e81b83503900be277e6273a79651b375e288 and later · before 3c318f97dcc50b2e0556a1813bd6958678e881fdaffected · git
    • 3.0.81 and later · before 3.1affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.176-16.1.176-1
Debian:13linuxbefore 6.12.86-16.12.86-1
Debian:14linuxbefore 7.0.4-17.0.4-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-46014May 27, 2026 · KVM: SVM: Add missing save/restore handling of LBR MSRs
    22Monitor
  • ← EarlierCVE-2026-46015May 27, 2026 · tcp: call sk_data_ready() after listener migration
    31Monitor
  • Later →CVE-2026-46021May 27, 2026 · thermal: core: Fix thermal zone governor cleanup issues
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux0da05fedf5e1966b7e7d389866cb86fcf09f4b32Vendor (CNA)
Linux Linux3.1Vendor (CNA)
Linux Linux3.3Vendor (CNA)
Linux Linux3c318f97dcc50b2e0556a1813bd6958678e881fdVendor (CNA)
Linux Linux4d7893a137eadb6163ea4298bf67d74b811d76efVendor (CNA)
Linux Linux5436bc1b07d4656f99412dc72871d250d7d55205Vendor (CNA)
Linux Linuxa0b78639ef09b2e77974a3de3b1c07f6de3c5e56Vendor (CNA)
Linux Linuxab5ba9fd138758ddc50222264ff246b31e397abfVendor (CNA)
Linux Linuxba036305323814ec1f8655313b2fa6a0f7048716Vendor (CNA)
Linux Linuxf14bd323eec4b4f0ef662520ec852e593ece1d4cVendor (CNA)
azl3 kernel 6.6.139.1-1 on Azure Linux 3.06.6.141.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.176-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (8 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records