CVE-2024-43883Network attack vector

Kernel code execution via stale USB device references

Published Aug 23, 2024 · Updated Aug 5, 2026

Use-after-free in the Linux vhci-hcd USB/IP client allows remote attackers to execute kernel code through crafted protocol traffic. Concurrent reset and enumeration paths drop a usb_device reference before acquiring its replacement, leaving vdev->udev and in-flight URBs pointing to freed heap memory. A malicious or compromised USB/IP server can drive the race without target credentials, enabling kernel-memory disclosure, corruption, code execution, or a crash.

CVSS severity9.8
Critical
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux vhci-hcd USB/IP client allows remote attackers to execute kernel code through crafted protocol traffic. Concurrent reset and enumeration paths drop a usb_device reference before acquiring its replacement, leaving vdev->udev and in-flight URBs pointing to freed heap memory. A malicious or compromised USB/IP server can drive the race without target credentials, enabling kernel-memory disclosure, corruption, code execution, or a crash.

The record

CVE
CVE-2024-43883
Published
Aug 23, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 23, 2024CVE 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=075b4e6a982d38121250c090f7b9294314ac1b19
  2. Affected versionversion=1c8d316294916da7e2a2f1f178ca3f3bd6d7b531
  3. Affected versionversion=2.6.32.30 <2.6.33
  4. Affected versionversion=2.6.33.8 <2.6.34
  5. Affected versionversion=2.6.34.10 <2.6.35
  6. Affected versionversion=2.6.35.12 <2.6.36
  7. Affected versionversion=2.6.37.3 <2.6.38
  8. Affected versionversion=2.6.38
  9. Affected versionversion=436e52f1a628233f080605dd736594df250897ca
  10. Affected versionversion=7606ee8aa33287dd3e6eb44c78541b87a413a325 <128e82e41cf7d74a562726c1587d9d2ede1a0a37
  11. Affected versionversion=7606ee8aa33287dd3e6eb44c78541b87a413a325 <4dacdb9720aaab10b6be121eae55820174d97174
  12. Affected versionversion=7606ee8aa33287dd3e6eb44c78541b87a413a325 <585e6bc7d0a9bf73a8be3d3fb34e86b90cc61a14
  13. Affected versionversion=7606ee8aa33287dd3e6eb44c78541b87a413a325 <5a3c473b28ae1c1f7c4dc129e30cb19ae6e96f89
  14. Affected versionversion=7606ee8aa33287dd3e6eb44c78541b87a413a325 <9c3746ce8d8fcb3a2405644fc0eec7fc5312de80
  15. Affected versionversion=7606ee8aa33287dd3e6eb44c78541b87a413a325 <afdcfd3d6fcdeca2735ca8d994c5f2d24a368f0a
  16. Affected versionversion=7606ee8aa33287dd3e6eb44c78541b87a413a325 <c3d0857b7fc2c49f68f89128a5440176089a8f54
  17. Affected versionversion=7606ee8aa33287dd3e6eb44c78541b87a413a325 <e8c1e606dab8c56cf074b43b98d0805de7322ba2
  18. Affected versionversion=927c3fa44e24300eb827ab9f9dacce6dff9c9bb7
  19. Affected versionversion=96ea4801d2035f89fc4ec4a67f49a18c35cb6715

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=075b4e6a982d38121250c090f7b9294314ac1b19; version=1c8d316294916da7e2a2f1f178ca3f3bd6d7b531; version=2.6.32.30 <2.6.33; version=2.6.33.8 <2.6.34; version=2.6.34.10 <2.6.35; version=2.6.35.12 <2.6.36; version=2.6.37.3 <2.6.38; version=2.6.38; version=436e52f1a628233f080605dd736594df250897ca; version=7606ee8aa33287dd3e6eb44c78541b87a413a325 <128e82e41cf7d74a562726c1587d9d2ede1a0a37; version=7606ee8aa33287dd3e6eb44c78541b87a413a325 <4dacdb9720aaab10b6be121eae55820174d97174; version=7606ee8aa33287dd3e6eb44c78541b87a413a325 <585e6bc7d0a9bf73a8be3d3fb34e86b90cc61a14; version=7606ee8aa33287dd3e6eb44c78541b87a413a325 <5a3c473b28ae1c1f7c4dc129e30cb19ae6e96f89; version=7606ee8aa33287dd3e6eb44c78541b87a413a325 <9c3746ce8d8fcb3a2405644fc0eec7fc5312de80; version=7606ee8aa33287dd3e6eb44c78541b87a413a325 <afdcfd3d6fcdeca2735ca8d994c5f2d24a368f0a; version=7606ee8aa33287dd3e6eb44c78541b87a413a325 <c3d0857b7fc2c49f68f89128a5440176089a8f54; version=7606ee8aa33287dd3e6eb44c78541b87a413a325 <e8c1e606dab8c56cf074b43b98d0805de7322ba2; version=927c3fa44e24300eb827ab9f9dacce6dff9c9bb7; version=96ea4801d2035f89fc4ec4a67f49a18c35cb6715

Published CVSS scores

7.1Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
9.8Linux Kernel CVE TeamCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.1OracleCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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.

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free

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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