CVE-2026-64372 (GCVE-0-2026-64372)
Vulnerability from cvelistv5
Published
2026-07-25 08:50
Modified
2026-10-19 20:38
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: cpufreq: pcc: fix use-after-free and double free in _OSC evaluation pcc_cpufreq_do_osc() calls acpi_evaluate_object() twice for the two-phase _OSC negotiation. Between the two calls it freed output.pointer but left output.length unchanged. Since acpi_evaluate_object() treats a non-zero length with a non-NULL pointer as an existing buffer to write into, the second call wrote into freed memory (use-after-free). The subsequent kfree(output.pointer) at out_free then freed the same pointer a second time (double free). Reset output.pointer to NULL and output.length to ACPI_ALLOCATE_BUFFER after freeing the first result, so ACPICA allocates a fresh buffer for each phase independently.
References
Impacted products
Vendor Product Version
Linux Linux Version: 0f1d683fb35d6c6f49ef696c95757f3970682a0e
Version: 0f1d683fb35d6c6f49ef696c95757f3970682a0e
Version: 0f1d683fb35d6c6f49ef696c95757f3970682a0e
Version: 0f1d683fb35d6c6f49ef696c95757f3970682a0e
Version: 0f1d683fb35d6c6f49ef696c95757f3970682a0e
Version: 0f1d683fb35d6c6f49ef696c95757f3970682a0e
Version: 0f1d683fb35d6c6f49ef696c95757f3970682a0e
Version: 0f1d683fb35d6c6f49ef696c95757f3970682a0e
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