5.5

CVE-2025-21835: linux

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2025-21835DEBIAN-CVE-2025-21835
Published 07-03-2025Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2025-21835 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.23% chance of exploitation in the next 30 days, higher than 12.8% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.23%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 48 · Related 47
DLA-4102-1DLA-4178-1SUSE-SU-2025:01919-1SUSE-SU-2025:1177-1SUSE-SU-2025:1178-1SUSE-SU-2025:1180-1

Timeline

  1. 07-03-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.23%

Chance of exploitation in the next 30 days

Percentile

13%

Versus all other CVEs

30-day change

+0.03 pp

From 0.20% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.23%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu137 products
  • linuxAll versions (No fix recorded) | < 5.4.0-216.236 | < 5.15.0-140.150 | < 6.8.0-78.78
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1146.156 | < 5.15.0-1084.91 | < 6.8.0-1035.37
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ c8933c3f79568263c90a46f06cf80419e6c63c97, < 3a983390d14e8498f303fc5cb23ab7d696b815db | ≥ c8933c3f79568263c90a46f06cf80419e6c63c97, < 9f36a89dcb78cb7e37f487b04a16396ac18c0636 | ≥ c8933c3f79568263c90a46f06cf80419e6c63c97, < d8e86700c8a8cf415e300a0921acd6a8f9b494f8 | ≥ c8933c3f79568263c90a46f06cf80419e6c63c97, < 9f6860a9c11301b052225ca8825f8d2b1a5825bf | ≥ c8933c3f79568263c90a46f06cf80419e6c63c97, < 6ae6dee9f005a2f3b739b85abb6f14a0935699e0 | ≥ c8933c3f79568263c90a46f06cf80419e6c63c97, < 6b16761a928796e4b49e89a0b1ac284155172726 | ≥ c8933c3f79568263c90a46f06cf80419e6c63c97, < a2d0694e1f111379c1efdf439dadd3cfd959fe9d | ≥ c8933c3f79568263c90a46f06cf80419e6c63c97, < da1668997052ed1cb00322e1f3b63702615c9429 | 3.2
  • linux_kernel≥ 3.2, < 5.4.291 | ≥ 5.5, < 5.10.235 | ≥ 5.11, < 5.15.179 | ≥ 5.16, < 6.1.129 | ≥ 6.2, < 6.6.79 | ≥ 6.7, < 6.12.16 | ≥ 6.13, < 6.13.4 | 6.14:rc1 | 6.14:rc2
Debian1 product
  • linux< 6.1.129-1 | < 6.12.16-1

3 vendors · 140 products

References

55 links
Show all 55 references