Kernel out-of-bounds access via premature forced completion
Published Jun 19, 2024 · Updated Aug 5, 2026
Out-of-bounds access in the Linux mlx5 command path allows local users to compromise the kernel through a timed-out command. Forced-completion handling can run before a command entry receives an index, then use the negative error value -22 as an array index. Low-privileged local access and an enabled mlx5 path are required; the resulting kernel access can expose or alter data or interrupt the system.
Summary
What happened
Out-of-bounds access in the Linux mlx5 command path allows local users to compromise the kernel through a timed-out command. Forced-completion handling can run before a command entry receives an index, then use the negative error value -22 as an array index. Low-privileged local access and an enabled mlx5 path are required; the resulting kernel access can expose or alter data or interrupt the system.
The record
- CVE
- CVE-2024-38556
- Published
- Jun 19, 2024
- Updated
- Aug 5, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-129, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 19, 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=4646175c19fd019b773444a11ff62748eb83745b
- Affected versionversion=5.10.94 <5.11
- Affected versionversion=5.15.17 <5.16
- Affected versionversion=5.16.3 <5.17
- Affected versionversion=5.17
- Affected versionversion=5.4.174 <5.5
- Affected versionversion=74dd45122b84479eee50bd0956ae8bc5799c9f8a
- Affected versionversion=8e715cd613a1e872b9d918e912d90b399785761a <2d0962d05c93de391ce85f6e764df895f47c8918
- Affected versionversion=8e715cd613a1e872b9d918e912d90b399785761a <485d65e1357123a697c591a5aeb773994b247ad7
- Affected versionversion=8e715cd613a1e872b9d918e912d90b399785761a <4baae687a20ef2b82fde12de3c04461e6f2521d6
- Affected versionversion=8e715cd613a1e872b9d918e912d90b399785761a <94024332a129c6e4275569d85c0c1bfb2ae2d71b
- Affected versionversion=8e715cd613a1e872b9d918e912d90b399785761a <f9caccdd42e999b74303c9b0643300073ed5d319
- Affected versionversion=d73d81447c6651904dd4a9e3fd88651ff174c1b7
- Affected versionversion=e801f81cee3c8901f52ee48c6329802b28fbb49c
What conditions does exploitation require?
What is affected?
Published CVSS scores
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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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