Local denial of service via premature MSI-X reads
Published May 8, 2025 · Updated May 23, 2026
Denial of service in the Linux kernel NIU driver allows local users to panic SPARC systems during MSI-X initialization. In niu_try_msix(), the driver lets MSI-X table registers be read before each vector's ENTRY_DATA register has been written, provoking a non-resumable hardware trap. The condition requires a SPARC system with NIU hardware after power-up; an ordinary reboot into an affected kernel does not retrigger it.
Summary
What happened
Denial of service in the Linux kernel NIU driver allows local users to panic SPARC systems during MSI-X initialization. In niu_try_msix(), the driver lets MSI-X table registers be read before each vector's ENTRY_DATA register has been written, provoking a non-resumable hardware trap. The condition requires a SPARC system with NIU hardware after power-up; an ordinary reboot into an affected kernel does not retrigger it.
The record
- CVE
- CVE-2025-37833
- Published
- May 8, 2025
- Updated
- May 23, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- Unavailable
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- May 8, 2025CVE publishedPublication date reported by the CVE source.
- May 23, 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?
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- Affected versionversion=1866c8f6d43c3c6ffa2bfe086b65392b3a3fafb1
- Affected versionversion=3590d16b47ac561a4f2504befe43def10ed1814c
- Affected versionversion=3b570884c868c12e3184627ce4b4a167e9d6f018
- Affected versionversion=4.14.245 <4.15
- Affected versionversion=4.19.205 <4.20
- Affected versionversion=4.4.282 <4.5
- Affected versionversion=4.9.281 <4.10
- Affected versionversion=5.10.60 <5.11
- Affected versionversion=5.13.12 <5.14
- Affected versionversion=5.14
- Affected versionversion=5.4.142 <5.5
- Affected versionversion=6c971252f09040af40d20851cf4e14018e6710d9
- Affected versionversion=7d5ec3d3612396dc6d4b76366d20ab9fc06f399f <64903e4849a71cf7f7c7e5d45225ccefc1280929
- Affected versionversion=7d5ec3d3612396dc6d4b76366d20ab9fc06f399f <c187aaa9e79b4b6d86ac7ba941e579ad33df5538
- Affected versionversion=7d5ec3d3612396dc6d4b76366d20ab9fc06f399f <fbb429ddff5c8e479edcc7dde5a542c9295944e6
- Affected versionversion=aa8092c1d1f142f797995d0448afb73a5148f4ae
- Affected versionversion=e1d5e8a561baaafed6e35d72a6ad53d248580d6c
- Affected versionversion=e6454fd429b0ba6513ac1de27a0bd6ccac021a40
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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