Driver cleanup disruption via runtime PM counter underflow
Published May 8, 2026 · Updated May 8, 2026
Integer underflow in the Linux Kernel wave5 driver allows local users to disrupt driver removal by unloading an affected module. The wave5 driver remove path unconditionally calls pm_runtime_put_sync() after autosuspend can reduce the usage count to zero, decrementing it to -1. Reachability requires local access, an affected kernel with the wave5 media driver active, and module removal; the reported consequence is a runtime-PM underflow warning during cleanup.
Summary
What happened
Integer underflow in the Linux Kernel wave5 driver allows local users to disrupt driver removal by unloading an affected module. The wave5 driver remove path unconditionally calls pm_runtime_put_sync() after autosuspend can reduce the usage count to zero, decrementing it to -1. Reachability requires local access, an affected kernel with the wave5 media driver active, and module removal; the reported consequence is a runtime-PM underflow warning during cleanup.
The record
- CVE
- CVE-2026-43301
- Published
- May 8, 2026
- Updated
- May 8, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- CWE-191, T1499.004
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- May 8, 2026CVE publishedPublication date reported by the CVE source.
- May 8, 2026Record updatedLatest update available in the CVE record.
Exploitability
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- Affected versionversion=6.8
- Affected versionversion=9707a6254a8a6b978bde811a44fe07d86c229d1c <0bffda02317989f8d5cdc2d4462a4110b1290cf0
- Affected versionversion=9707a6254a8a6b978bde811a44fe07d86c229d1c <3a278a55ead50db2444c8f01410c7f5a68723990
- Affected versionversion=9707a6254a8a6b978bde811a44fe07d86c229d1c <9cf4452e824c1e2d41c9c0b13cc8a32a0a7dec38
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What is affected?
Published CVSS scores
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Attacks
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Technologies
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Your stack
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