CVE-2025-21708

Service interruption via unchecked USB endpoint types

Published Feb 27, 2025 · Updated May 11, 2026

Improper endpoint validation in the Linux rtl8150 USB driver allows local users to interrupt service through a crafted USB device. The driver accepts USB endpoint descriptors without confirming the required bulk and interrupt types, then submits URBs through mismatched pipes when rtl8150_open activates the interface. Exploitation requires local access and an rtl8150-compatible USB interface with unexpected endpoint types; reported impact is limited to availability, with no data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper endpoint validation in the Linux rtl8150 USB driver allows local users to interrupt service through a crafted USB device. The driver accepts USB endpoint descriptors without confirming the required bulk and interrupt types, then submits URBs through mismatched pipes when rtl8150_open activates the interface. Exploitation requires local access and an rtl8150-compatible USB interface with unexpected endpoint types; reported impact is limited to availability, with no data disclosure or modification.

The record

CVE
CVE-2025-21708
Published
Feb 27, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 27, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3c706829ceb6e347bd4ddfd17f1d3048acd69da2
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <431be4f78220d34ce21d67a6b843b7ca81bd82e9
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8f78a2b9ed4cb1e62c60d0a8905d9a37bc18c20d
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <90b7f2961798793275b4844348619b622f983907
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c843515ad2be7349dd6b60e5fd299d0da0b8458b
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d42168f109f96b5d18812a789086015a435ee667
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e10b392a7495a5dbbb25247e2c17d380d9899263
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f395b7efcee8df54309eb2d4a624ef13f5d88b66
  9. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3c706829ceb6e347bd4ddfd17f1d3048acd69da2; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <431be4f78220d34ce21d67a6b843b7ca81bd82e9; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8f78a2b9ed4cb1e62c60d0a8905d9a37bc18c20d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <90b7f2961798793275b4844348619b622f983907; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c843515ad2be7349dd6b60e5fd299d0da0b8458b; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d42168f109f96b5d18812a789086015a435ee667; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e10b392a7495a5dbbb25247e2c17d380d9899263; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f395b7efcee8df54309eb2d4a624ef13f5d88b66; version=2.6.12

Published CVSS scores

3.3OracleCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
5.5CanonicalCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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