System lockup via stale DSP response handling
Published May 6, 2026 · Updated May 6, 2026
Denial of service in Linux Kernel 4.18 through 6.19.5 allows local users to lock up the system through the Qualcomm q6asm audio driver. The q6asm_stream_callback function continues processing late DSP responses for closed streams instead of exiting, including write-response opcodes. Reachability requires local low-privileged access and a system using the Qualcomm QDSP6 audio path; the result is a system lockup without reported data disclosure or modification.
Summary
What happened
Denial of service in Linux Kernel 4.18 through 6.19.5 allows local users to lock up the system through the Qualcomm q6asm audio driver. The q6asm_stream_callback function continues processing late DSP responses for closed streams instead of exiting, including write-response opcodes. Reachability requires local low-privileged access and a system using the Qualcomm QDSP6 audio path; the result is a system lockup without reported data disclosure or modification.
The record
- CVE
- CVE-2026-43204
- Published
- May 6, 2026
- Updated
- May 6, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- T1499
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- May 6, 2026CVE publishedPublication date reported by the CVE source.
- May 6, 2026Record updatedLatest update available in the CVE record.
Exploitability
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Is a vulnerable build present?
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- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3249251eac6081d5169ba09f2d9cca66ab0cab0d
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8a066a81ee0c1b6cdbd81393536c3b2d19ccef25
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What is affected?
Published CVSS scores
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Attacks
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Technologies
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