Skip to content
Noroxi
NVD / CVE Program· CNA Linux

CVE-2026-52963: ALSA: usb-audio: Bound MIDI endpoint descriptor scans

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: 0.16% (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 09141583bd97f4bbd7358e29fd138fe798467cdb, 3d3b2b01a3e73828e201ece96f863e7a3e0cdc6e, 4.10; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.143.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 09141583bd97f4bbd7358e29fd138fe798467cdb, 3d3b2b01a3e73828e201ece96f863e7a3e0cdc6e, 4.10; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.143.1-1 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: Bound MIDI endpoint descriptor scans snd_usbmidi_get_ms_info() validates the internal MIDIStreaming endpoint descriptor size before using baAssocJackID[], but the descriptor walker can still return a class-specific endpoint descriptor whose bLength exceeds the remaining bytes in the endpoint-extra scan. That leaves later flexible-array reads bounded by bLength, but not by the remaining bytes in the endpoint-extra scan. Stop walking when bLength is zero or extends past the remaining endpoint-extra scan.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Jun 24, 2026
Updated
Nov 6, 2026
EPSS
0.1% · 5th 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%

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-2026-52963

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

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for linux records

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

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.

We use this product, ask for help

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 kernel4.4.238 and later · before 4.5
  • linux linux kernel4.9.238 and later · before 4.10
  • linux linux kernel4.14.200 and later · before 4.15
  • linux linux kernel4.19.149 and later · before 4.20
  • linux linux kernel5.4.69 and later · before 5.5
  • linux linux kernel5.7 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 6.6.141
  • linux linux kernel6.7 and later · before 6.12.91
  • linux linux kernel6.13 and later · before 6.18.33
  • linux linux kernel6.19 and later · before 7.0.10
  • 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

    • 9e0c71f2f633b0442661966228827d1a33df485f, 0868bc5654c07628c421547f0821650a8c2cb8f3, 78483c1c7741ffa72991d93d19a75bfdcc2cbf57, 65d95462001c6ccd9bc9499c1fc9a90eca9de496, ca767cf0152d18fc299cde85b18d1f46ac21e1ba, 5.7affected
    • 5c6cd7021a05a02fcf37f360592d7c18d4d807fb and later · before e2f1260a056eb3215c13c48c5378f3e4112dc3afaffected · git
    • 5c6cd7021a05a02fcf37f360592d7c18d4d807fb and later · before c65b137d351e21cbc5630e73ef0eb1e1d75f5b20affected · git
    • 5c6cd7021a05a02fcf37f360592d7c18d4d807fb and later · before 728ab0c72e49ca27185067984cd565425eb69b2eaffected · git
    • 5c6cd7021a05a02fcf37f360592d7c18d4d807fb and later · before 3d3b2b01a3e73828e201ece96f863e7a3e0cdc6eaffected · git
    • 5c6cd7021a05a02fcf37f360592d7c18d4d807fb and later · before a0226560540c16717efcceaf15c862cf115b01d3affected · git
    • 5c6cd7021a05a02fcf37f360592d7c18d4d807fb and later · before 09141583bd97f4bbd7358e29fd138fe798467cdbaffected · git
    • 5c6cd7021a05a02fcf37f360592d7c18d4d807fb and later · before c59159ce10e75b568cd0d4b29efcb0fb0ddecc94affected · git
    • 5c6cd7021a05a02fcf37f360592d7c18d4d807fb and later · before d6854daa67be623860f4e1873fd3d3c275aba4edaffected · git
    • 4.4.238 and later · before 4.5affected · 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 6.12.94-16.12.94-1
Debian:14linuxbefore 7.0.10-17.0.10-1

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-2026-52961Jun 24, 2026 · ceph: fix BUG_ON in __ceph_build_xattrs_blob() due to stale blob size
    22Monitor
  • ← EarlierCVE-2026-52962Jun 24, 2026 · ceph: fix a buffer leak in __ceph_setxattr()
    31Monitor
  • Later →CVE-2026-52964Jun 24, 2026 · ALSA: usb-audio: Bound MIDI 2.0 endpoint descriptor scans
    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 Linux09141583bd97f4bbd7358e29fd138fe798467cdbVendor (CNA)
Linux Linux3d3b2b01a3e73828e201ece96f863e7a3e0cdc6eVendor (CNA)
Linux Linux4.10Vendor (CNA)
Linux Linux4.15Vendor (CNA)
Linux Linux4.20Vendor (CNA)
Linux Linux4.5Vendor (CNA)
Linux Linux5.5Vendor (CNA)
Linux Linux728ab0c72e49ca27185067984cd565425eb69b2eVendor (CNA)
Linux Linuxa0226560540c16717efcceaf15c862cf115b01d3Vendor (CNA)
Linux Linuxc59159ce10e75b568cd0d4b29efcb0fb0ddecc94Vendor (CNA)
Linux Linuxc65b137d351e21cbc5630e73ef0eb1e1d75f5b20Vendor (CNA)
Linux Linuxd6854daa67be623860f4e1873fd3d3c275aba4edVendor (CNA)
Linux Linuxe2f1260a056eb3215c13c48c5378f3e4112dc3afVendor (CNA)
azl3 kernel 6.6.139.1-1 on Azure Linux 3.06.6.143.1-1 · 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).

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)

—

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 (7 more)

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

All records