CVE WatchOct 19, 2026

CVE-2026-64372

In the Linux kernel, the following vulnerability has been resolved: cpufreq: pcc: fix use-after-free and double free in _OSC evaluation pc

CVSS

7.8

High

EPSS

0.1%

KEV

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Exploit Today

0-100

Published: Jul 25, 2026 · Last modified: Oct 19, 2026 · CWE-416

EPSS · 30d

0.1%EPSS · 30 days0.1%

2026-10-072026-11-04

Technical description

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.

Official references

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