Kernel memory exposure via reset recovery race
Published May 1, 2024 · Updated Aug 5, 2026
Use-after-free in the Linux QAT driver allows local users to read freed memory and disrupt affected kernels during PCI AER recovery. The reset scheduler frees reset_data after a restart exceeds ten seconds, but adf_device_reset_worker later reads that allocation for completion notification. Reachability requires local low-privileged access and an Intel QAT device undergoing the prolonged restart; the race can compromise kernel data or availability.
Summary
What happened
Use-after-free in the Linux QAT driver allows local users to read freed memory and disrupt affected kernels during PCI AER recovery. The reset scheduler frees reset_data after a restart exceeds ten seconds, but adf_device_reset_worker later reads that allocation for completion notification. Reachability requires local low-privileged access and an Intel QAT device undergoing the prolonged restart; the race can compromise kernel data or availability.
The record
- CVE
- CVE-2024-26974
- Published
- May 1, 2024
- Updated
- Aug 5, 2026
- Vendor
- Siemens
- Product
- SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
- Classifications
- CWE-367, CWE-416, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- May 1, 2024CVE publishedPublication date reported by the CVE source.
- Aug 5, 2026Record updatedLatest update available in the CVE record.
Exploitability
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- Affected versionversion=0 <*
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Published CVSS scores
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Attacks
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