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.
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
- Aug 23, 2024CVE publishedPublication date reported by the CVE source.
- Aug 5, 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.
- Affected versionversion=075b4e6a982d38121250c090f7b9294314ac1b19
- Affected versionversion=1c8d316294916da7e2a2f1f178ca3f3bd6d7b531
- Affected versionversion=2.6.32.30 <2.6.33
- Affected versionversion=2.6.33.8 <2.6.34
- Affected versionversion=2.6.34.10 <2.6.35
- Affected versionversion=2.6.35.12 <2.6.36
- Affected versionversion=2.6.37.3 <2.6.38
- Affected versionversion=2.6.38
- Affected versionversion=436e52f1a628233f080605dd736594df250897ca
- Affected versionversion=7606ee8aa33287dd3e6eb44c78541b87a413a325 <128e82e41cf7d74a562726c1587d9d2ede1a0a37
- Affected versionversion=7606ee8aa33287dd3e6eb44c78541b87a413a325 <4dacdb9720aaab10b6be121eae55820174d97174
- Affected versionversion=7606ee8aa33287dd3e6eb44c78541b87a413a325 <585e6bc7d0a9bf73a8be3d3fb34e86b90cc61a14
- Affected versionversion=7606ee8aa33287dd3e6eb44c78541b87a413a325 <5a3c473b28ae1c1f7c4dc129e30cb19ae6e96f89
- Affected versionversion=7606ee8aa33287dd3e6eb44c78541b87a413a325 <9c3746ce8d8fcb3a2405644fc0eec7fc5312de80
- Affected versionversion=7606ee8aa33287dd3e6eb44c78541b87a413a325 <afdcfd3d6fcdeca2735ca8d994c5f2d24a368f0a
- Affected versionversion=7606ee8aa33287dd3e6eb44c78541b87a413a325 <c3d0857b7fc2c49f68f89128a5440176089a8f54
- Affected versionversion=7606ee8aa33287dd3e6eb44c78541b87a413a325 <e8c1e606dab8c56cf074b43b98d0805de7322ba2
- Affected versionversion=927c3fa44e24300eb827ab9f9dacce6dff9c9bb7
- Affected versionversion=96ea4801d2035f89fc4ec4a67f49a18c35cb6715
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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