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NVD / CVE Program· CNA Linux

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

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: 0.13% (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 076d5d13eb9c1ad259a7f246149f6676c62285f9, 24a40df79307ca7ca0eec0889361cf6ac146d72a, 316aa0b1e3c5600eae5ab876394c1ac70e6db581; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.141.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 076d5d13eb9c1ad259a7f246149f6676c62285f9, 24a40df79307ca7ca0eec0889361cf6ac146d72a, 316aa0b1e3c5600eae5ab876394c1ac70e6db581; 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: 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.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 28, 2026
Updated
Nov 6, 2026
EPSS
0.1% · 2th percentile

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%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

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.

Follow CVE-2026-46146

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 kernel5.4.297 and later · before 5.5
  • linux linux kernel5.10.241 and later · before 5.10.258
  • linux linux kernel5.15.190 and later · before 5.15.209
  • linux linux kernel6.1.149 and later · before 6.1.175
  • linux linux kernel6.6.103 and later · before 6.6.140
  • linux linux kernel6.12.43 and later · before 6.12.88
  • linux linux kernel6.15.11 and later · before 6.16
  • linux linux kernel6.16.2 and later · before 6.17
  • linux linux kernel6.17.1 and later · before 6.18.30
  • linux linux kernel6.19 and later · before 7.0.7
  • linux linux kernel6.17
  • linux linux kernel7.1

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

    • 799c06ad4c9c790c265e8b6b94947213f1fb389c, dfdcbcde5c20df878178245d4449feada7d5b201, 7ef3fd250f84494fb2f7871f357808edaa1fc6ce, 6.17affected
    • 786571b10b1ae6d90e1242848ce78ee7e1d493c4 and later · before 076d5d13eb9c1ad259a7f246149f6676c62285f9affected · git
    • 275e37532e8ebe25e8a4069b2d9f955bfd202a46 and later · before 316aa0b1e3c5600eae5ab876394c1ac70e6db581affected · git
    • 47ab3d820cb0a502bd0074f83bb3cf7ab5d79902 and later · before 24a40df79307ca7ca0eec0889361cf6ac146d72aaffected · git
    • 1034719fdefd26caeec0a44a868bb5a412c2c1a5 and later · before e0e3dcf48189603f3865f1a0b799b3b42baae96daffected · git
    • ae17b3b5e753efc239421d186cd1ff06e5ac296e and later · before 4e0ee232ebe3df04874125d7c7f3e6c25ea5483daffected · git
    • ecfd41166b72b67d3bdeb88d224ff445f6163869 and later · before be09b47ed8677d76962e3240c145502e2ad9f3c8affected · git
    • ecfd41166b72b67d3bdeb88d224ff445f6163869 and later · before fa5b19ce69067874b1413f3c2027563bae8c2cb3affected · git
    • ecfd41166b72b67d3bdeb88d224ff445f6163869 and later · before 6e7247d8f5fefeceb0bb9cc80a5388a636b219cdaffected · git
    • 5.10.241 and later · before 5.10.258affected · 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 6.12.88-16.12.88-1
Debian:14linuxbefore 7.0.7-17.0.7-1

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-2026-46144May 28, 2026 · RDMA/mana: Fix error unwind in mana_ib_create_qp_rss()
    22Monitor
  • ← EarlierCVE-2026-46145May 28, 2026 · RDMA/mana: Validate rx_hash_key_len
    31Monitor
  • Later →CVE-2026-46148May 28, 2026 · spi: microchip-core-qspi: control built-in cs manually
    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 Linux076d5d13eb9c1ad259a7f246149f6676c62285f9Vendor (CNA)
Linux Linux24a40df79307ca7ca0eec0889361cf6ac146d72aVendor (CNA)
Linux Linux316aa0b1e3c5600eae5ab876394c1ac70e6db581Vendor (CNA)
Linux Linux4e0ee232ebe3df04874125d7c7f3e6c25ea5483dVendor (CNA)
Linux Linux5.10.258Vendor (CNA)
Linux Linux5.15.209Vendor (CNA)
Linux Linux5.5Vendor (CNA)
Linux Linux6.1.175Vendor (CNA)
Linux Linux6.12.88Vendor (CNA)
Linux Linux6.16Vendor (CNA)
Linux Linux6.17Vendor (CNA)
Linux Linux6.6.140Vendor (CNA)
Linux Linux6e7247d8f5fefeceb0bb9cc80a5388a636b219cdVendor (CNA)
Linux Linuxbe09b47ed8677d76962e3240c145502e2ad9f3c8Vendor (CNA)
Linux Linuxe0e3dcf48189603f3865f1a0b799b3b42baae96dVendor (CNA)
Linux Linuxfa5b19ce69067874b1413f3c2027563bae8c2cb3Vendor (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.

  • CVE-2026-3144836 days apartext4: avoid infinite loops caused by residual data
    37Monitor
  • CVE-2026-6388952 days apartscsi: scsi_transport_fc: Widen FPIN pname walker counter to u32
    32Monitor
  • CVE-2026-5293327 days apartio_uring/poll: fix signed comparison in io_poll_get_ownership()
    31Monitor
  • CVE-2026-460521 days apartceph: only d_add() negative dentries when they are unhashed
    30Monitor
  • CVE-2026-3155234 days apartwifi: wlcore: Return -ENOMEM instead of -EAGAIN if there is not enough headroom
    30Monitor
  • CVE-2026-6396852 days apartipv6: fix possible infinite loop in fib6_select_path()
    30Monitor

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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

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)

CWE-835 · Loop with Unreachable Exit Condition ('Infinite Loop')

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. SSVC exploitation— → none
  2. 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