Local ADC corruption via stale SPI cleanup state
Published Jul 25, 2026 · Updated Jul 25, 2026
Improper state cleanup in Linux Kernel 6.14 allows local users to corrupt ADC measurements and interrupt a shared SPI bus. In ad_sigma_delta_single_conversion(), cleanup runs while keep_cs_asserted remains true, so callback transfers leave chip select asserted; the buffer-enable error path also retains continuous mode and a stale bus_locked flag after releasing the SPI bus. An unprivileged user can trigger the path through world-readable IIO *_raw sysfs attributes, causing unintended ADC register writes or bus unavailability until reset.
Summary
What happened
Improper state cleanup in Linux Kernel 6.14 allows local users to corrupt ADC measurements and interrupt a shared SPI bus. In ad_sigma_delta_single_conversion(), cleanup runs while keep_cs_asserted remains true, so callback transfers leave chip select asserted; the buffer-enable error path also retains continuous mode and a stale bus_locked flag after releasing the SPI bus. An unprivileged user can trigger the path through world-readable IIO *_raw sysfs attributes, causing unintended ADC register writes or bus unavailability until reset.
The record
- CVE
- CVE-2026-64501
- Published
- Jul 25, 2026
- Updated
- Jul 25, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- T1499, T1565
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 25, 2026CVE publishedPublication date reported by the CVE source.
- Jul 25, 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=132d44dc6966c1cf841ffe0f6f048165687e870b <c313bb7c38855e94ceef939d152dd75e5a904b5f
- Affected versionversion=132d44dc6966c1cf841ffe0f6f048165687e870b <c72da0688575e5ef39c36bb44fed53aa18f8ae65
- Affected versionversion=132d44dc6966c1cf841ffe0f6f048165687e870b <f1de829ee87a1198d3465493ce430d36c5fa029c
- Affected versionversion=6.14
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Public exploit references
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Technologies
Your stack
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Your stack
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