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NVD / CVE Program· CNA Linux

CVE-2025-21835: usb: gadget: f_midi: fix MIDI Streaming descriptor lengths

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: 0.23% (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 3a983390d14e8498f303fc5cb23ab7d696b815db, 6ae6dee9f005a2f3b739b85abb6f14a0935699e0, 6b16761a928796e4b49e89a0b1ac284155172726.

Low priority for now. Upgrade to Linux Linux 3a983390d14e8498f303fc5cb23ab7d696b815db, 6ae6dee9f005a2f3b739b85abb6f14a0935699e0, 6b16761a928796e4b49e89a0b1ac284155172726 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: usb: gadget: f_midi: fix MIDI Streaming descriptor lengths While the MIDI jacks are configured correctly, and the MIDIStreaming endpoint descriptors are filled with the correct information, bNumEmbMIDIJack and bLength are set incorrectly in these descriptors. This does not matter when the numbers of in and out ports are equal, but when they differ the host will receive broken descriptors with uninitialized stack memory leaking into the descriptor for whichever value is smaller. The precise meaning of "in" and "out" in the port counts is not clearly defined and can be confusing. But elsewhere the driver consistently uses this to match the USB meaning of IN and OUT viewed from the host, so that "in" ports send data to the host and "out" ports receive data from it.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Mar 7, 2025
Updated
Oct 15, 2026
EPSS
0.2% · 13th 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 · 0.2%

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 kernel3.2 and later · before 5.4.291
  • linux linux kernel5.5 and later · before 5.10.235
  • linux linux kernel5.11 and later · before 5.15.179
  • linux linux kernel5.16 and later · before 6.1.129
  • linux linux kernel6.2 and later · before 6.6.79
  • linux linux kernel6.7 and later · before 6.12.16
  • linux linux kernel6.13 and later · before 6.13.4
  • linux linux kernel6.14

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

    • 3.2affected
    • c8933c3f79568263c90a46f06cf80419e6c63c97 and later · before 3a983390d14e8498f303fc5cb23ab7d696b815dbaffected · git
    • c8933c3f79568263c90a46f06cf80419e6c63c97 and later · before 9f36a89dcb78cb7e37f487b04a16396ac18c0636affected · git
    • c8933c3f79568263c90a46f06cf80419e6c63c97 and later · before d8e86700c8a8cf415e300a0921acd6a8f9b494f8affected · git
    • c8933c3f79568263c90a46f06cf80419e6c63c97 and later · before 9f6860a9c11301b052225ca8825f8d2b1a5825bfaffected · git
    • c8933c3f79568263c90a46f06cf80419e6c63c97 and later · before 6ae6dee9f005a2f3b739b85abb6f14a0935699e0affected · git
    • c8933c3f79568263c90a46f06cf80419e6c63c97 and later · before 6b16761a928796e4b49e89a0b1ac284155172726affected · git
    • c8933c3f79568263c90a46f06cf80419e6c63c97 and later · before a2d0694e1f111379c1efdf439dadd3cfd959fe9daffected · git
    • c8933c3f79568263c90a46f06cf80419e6c63c97 and later · before da1668997052ed1cb00322e1f3b63702615c9429affected · git
    • before 3.2not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.129-16.1.129-1
Debian:13linuxbefore 6.12.16-16.12.16-1

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-2025-21842Mar 7, 2025 · amdkfd: properly free gang_ctx_bo when failed to init user queue
    22Monitor
  • ← EarlierCVE-2025-21843Mar 7, 2025 · drm/panthor: avoid garbage value in panthor_ioctl_dev_query()
    22Monitor
  • Later →CVE-2025-21836Mar 7, 2025 · io_uring/kbuf: reallocate buf lists on upgrade
    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 Linux3a983390d14e8498f303fc5cb23ab7d696b815dbVendor (CNA)
Linux Linux6ae6dee9f005a2f3b739b85abb6f14a0935699e0Vendor (CNA)
Linux Linux6b16761a928796e4b49e89a0b1ac284155172726Vendor (CNA)
Linux Linux9f36a89dcb78cb7e37f487b04a16396ac18c0636Vendor (CNA)
Linux Linux9f6860a9c11301b052225ca8825f8d2b1a5825bfVendor (CNA)
Linux Linuxa2d0694e1f111379c1efdf439dadd3cfd959fe9dVendor (CNA)
Linux Linuxd8e86700c8a8cf415e300a0921acd6a8f9b494f8Vendor (CNA)
Linux Linuxda1668997052ed1cb00322e1f3b63702615c9429Vendor (CNA)
debian:linux6.1.129-1 · 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 (11 more)

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

All records