CVE-2025-40140

Kernel memory corruption via USB URB double submission

Published Nov 12, 2025 · Updated Aug 5, 2026

A race in the Linux rtl8150 USB network driver allows adjacent unauthenticated attackers to corrupt kernel memory and crash the host. rtl8150_set_multicast wakes the transmit queue while an earlier USB request remains active, letting rtl8150_start_xmit submit the same URB twice and use a freed packet buffer. Exploitation requires an RTL8150 interface and same-segment traffic that drives multicast changes while replies keep transmission active; successful races disclose heap data, corrupt memory, or panic the kernel.

CVSS severity8.8
High
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

A race in the Linux rtl8150 USB network driver allows adjacent unauthenticated attackers to corrupt kernel memory and crash the host. rtl8150_set_multicast wakes the transmit queue while an earlier USB request remains active, letting rtl8150_start_xmit submit the same URB twice and use a freed packet buffer. Exploitation requires an RTL8150 interface and same-segment traffic that drives multicast changes while replies keep transmission active; successful races disclose heap data, corrupt memory, or panic the kernel.

The record

CVE
CVE-2025-40140
Published
Nov 12, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 12, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <114e05344763a102a8844efd96ec06ba99293ccd
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1a08a37ac03d07a1608a1592791041cac979fbc3
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <54f8ef1a970a8376e5846ed90854decf7c00555d
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6053e47bbf212b93c051beb4261d7d5a409d0ce3
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6394bade9daab8e318c165fe43bba012bf13cd8e
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <958baf5eaee394e5fd976979b0791a875f14a179
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9d72df7f5eac946f853bf49c428c4e87a17d91da
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cce3c0e21cdd15bcba5c35d3af1700186de8f187
  9. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <114e05344763a102a8844efd96ec06ba99293ccd; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1a08a37ac03d07a1608a1592791041cac979fbc3; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <54f8ef1a970a8376e5846ed90854decf7c00555d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6053e47bbf212b93c051beb4261d7d5a409d0ce3; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6394bade9daab8e318c165fe43bba012bf13cd8e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <958baf5eaee394e5fd976979b0791a875f14a179; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9d72df7f5eac946f853bf49c428c4e87a17d91da; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cce3c0e21cdd15bcba5c35d3af1700186de8f187; version=2.6.12

Published CVSS scores

8.8Linux kernel CVE teamCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application or System Exploitation

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo