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NVD / CVE Program· CNA Linux

CVE-2025-38249: ALSA: usb-audio: Fix out-of-bounds read in snd_usb_get_audioformat_uac3()

Noroxi assessment

Priority: Monitor (action score 28/100)

  • 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 0ee87c2814deb5e42921281116ac3abcb326880b, 11e740dc1a2c8590eb7074b5c4ab921bb6224c36, 24ff7d465c4284529bbfa207757bffb6f44b6403; azl3 kernel 6.6.92.2-2 on Azure Linux 3.0 6.6.96.1-1; cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.0 5.15.200.1-1.

Low priority for now. Upgrade to Linux Linux 0ee87c2814deb5e42921281116ac3abcb326880b, 11e740dc1a2c8590eb7074b5c4ab921bb6224c36, 24ff7d465c4284529bbfa207757bffb6f44b6403; azl3 kernel 6.6.92.2-2 on Azure Linux 3.0 6.6.96.1-1; cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.0 5.15.200.1-1 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: Fix out-of-bounds read in snd_usb_get_audioformat_uac3() In snd_usb_get_audioformat_uac3(), the length value returned from snd_usb_ctl_msg() is used directly for memory allocation without validation. This length is controlled by the USB device. The allocated buffer is cast to a uac3_cluster_header_descriptor and its fields are accessed without verifying that the buffer is large enough. If the device returns a smaller than expected length, this leads to an out-of-bounds read. Add a length check to ensure the buffer is large enough for uac3_cluster_header_descriptor.

HighCVSS 7.1 · v3.1—No exploit Fix available
Published
Jul 9, 2025
Updated
Jun 17, 2026
EPSS
0.1% · 8th percentile

Report tools

JSON

Action score

28

Monitor

Low priority for now.

CVSS
28 / 40 · 7.1 / 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

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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
debiandebian linux

Affected versions

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

  • debian debian linux11.0
  • linux linux kernel5.5 and later · before 5.10.240
  • linux linux kernel5.11 and later · before 5.15.187
  • linux linux kernel5.16 and later · before 6.1.143
  • linux linux kernel4.17 and later · before 5.4.296
  • linux linux kernel6.7 and later · before 6.12.36
  • linux linux kernel6.13 and later · before 6.15.5
  • linux linux kernel6.2 and later · before 6.6.96
  • linux linux kernel6.16

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

    • 4.17affected
    • 9a2fe9b801f585baccf8352d82839dcd54b300cf and later · before 24ff7d465c4284529bbfa207757bffb6f44b6403affected · git
    • 9a2fe9b801f585baccf8352d82839dcd54b300cf and later · before 2dc1c3edf67abd30c757f8054a5da61927cdda21affected · git
    • 9a2fe9b801f585baccf8352d82839dcd54b300cf and later · before c3fb926abe90d86f5e3055e0035f04d9892a118baffected · git
    • 9a2fe9b801f585baccf8352d82839dcd54b300cf and later · before 6eb211788e1370af52a245d4d7da35c374c7b401affected · git
    • 9a2fe9b801f585baccf8352d82839dcd54b300cf and later · before 74fcb3852a2f579151ce80b9ed96cd916ba0d5d8affected · git
    • 9a2fe9b801f585baccf8352d82839dcd54b300cf and later · before 0ee87c2814deb5e42921281116ac3abcb326880baffected · git
    • 9a2fe9b801f585baccf8352d82839dcd54b300cf and later · before 11e740dc1a2c8590eb7074b5c4ab921bb6224c36affected · git
    • 9a2fe9b801f585baccf8352d82839dcd54b300cf and later · before fb4e2a6e8f28a3c0ad382e363aeb9cd822007b8aaffected · git
    • before 4.17not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.147-16.1.147-1
Debian:13linuxbefore 6.12.37-16.12.37-1

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-2025-38245Jul 9, 2025 · atm: Release atm_dev_mutex after removing procfs in atm_dev_deregister().
    31Monitor
  • ← EarlierCVE-2025-38247Jul 9, 2025 · userns and mnt_idmap leak in open_tree_attr(2)
    22Monitor
  • Later →CVE-2025-38251Jul 9, 2025 · atm: clip: prevent NULL deref in clip_push()
    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 Linux0ee87c2814deb5e42921281116ac3abcb326880bVendor (CNA)
Linux Linux11e740dc1a2c8590eb7074b5c4ab921bb6224c36Vendor (CNA)
Linux Linux24ff7d465c4284529bbfa207757bffb6f44b6403Vendor (CNA)
Linux Linux2dc1c3edf67abd30c757f8054a5da61927cdda21Vendor (CNA)
Linux Linux6eb211788e1370af52a245d4d7da35c374c7b401Vendor (CNA)
Linux Linux74fcb3852a2f579151ce80b9ed96cd916ba0d5d8Vendor (CNA)
Linux Linuxc3fb926abe90d86f5e3055e0035f04d9892a118bVendor (CNA)
Linux Linuxfb4e2a6e8f28a3c0ad382e363aeb9cd822007b8aVendor (CNA)
azl3 kernel 6.6.92.2-2 on Azure Linux 3.06.6.96.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.05.15.200.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.147-1 · 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
high · data can be read
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
High
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-125 · Out-of-bounds Read

CVSS vector

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

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

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

References

Show all references (9 more)

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

All records