Memory disclosure and test crash via length override
Published Jul 10, 2025 · Updated May 11, 2026
Out-of-bounds read in Linux kernel 6.14 through 6.15.3 allows local users to expose memory and crash the cs_dsp KUnit test. The cs_dsp_ctl_cache_init_multiple_offsets test allocates register values using a 4-byte mock template, then overrides the length to 8 bytes before later reads. The affected locus is KUnit test code under drivers/firmware/cirrus/test, so the condition requires that test suite to be built and invoked; no production driver path is identified.
Summary
What happened
Out-of-bounds read in Linux kernel 6.14 through 6.15.3 allows local users to expose memory and crash the cs_dsp KUnit test. The cs_dsp_ctl_cache_init_multiple_offsets test allocates register values using a 4-byte mock template, then overrides the length to 8 bytes before later reads. The affected locus is KUnit test code under drivers/firmware/cirrus/test, so the condition requires that test suite to be built and invoked; no production driver path is identified.
The record
- CVE
- CVE-2025-38330
- Published
- Jul 10, 2025
- Updated
- May 11, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-125
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 10, 2025CVE publishedPublication date reported by the CVE source.
- May 11, 2026Record updatedLatest update available in the CVE record.
Exploitability
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Is a vulnerable build present?
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- Affected versionversion=6.14
- Affected versionversion=9b33a4fc500cedc1adc9c0ee01e30ffd50e5887a <e3dafc64b90546eb769f33333afabd9e3e915757
- Affected versionversion=9b33a4fc500cedc1adc9c0ee01e30ffd50e5887a <f4ba2ea57da51d616b689c4b8826c517ff5a8523
What conditions does exploitation require?
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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