Answer in brief
CVE-2026-64372 records a High severity (CVSS 7.8) vulnerability in cpufreq: pcc: fix use-after-free and double free in _OSC evaluation. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=0f1d683fb35d6c6f49ef696c95757f3970682a0e <8e454e9d0bc03446d610ee49abec9dfd424f6541 || >=0f1d683fb35d6c6f49ef696c95757f3970682a0e <632666a63116d8061c62a988d1ca39dcd6d27c9b || >=0f1d683fb35d6c6f49ef696c95757f3970682a0e <5cdb25f144b101083d8bf3fd023ad87fbe6850d7 || >=0f1d683fb35d6c6f49ef696c95757f3970682a0e <982c9f92d57bda2b769851ff6d90d43dcf5f3734 || >=0f1d683fb35d6c6f49ef696c95757f3970682a0e <a36ca93a8ba57464e521d70a337d37f069064111 || >=0f1d683fb35d6c6f49ef696c95757f3970682a0e <6ba6f6783be2ffeb2cbcdc9321c4b9f708f796f7 || >=0f1d683fb35d6c6f49ef696c95757f3970682a0e <0e3c739a2f6fc1de5b19a8839ab80696b9cb2a29 || >=0f1d683fb35d6c6f49ef696c95757f3970682a0e <266d3dd8b757b48a576e90f018b51f7b7563cc32 | 8e454e9d0bc03446d610ee49abec9dfd424f6541, 632666a63116d8061c62a988d1ca39dcd6d27c9b, 5cdb25f144b101083d8bf3fd023ad87fbe6850d7, 982c9f92d57bda2b769851ff6d90d43dcf5f3734, a36ca93a8ba57464e521d70a337d37f069064111, 6ba6f6783be2ffeb2cbcdc9321c4b9f708f796f7, 0e3c739a2f6fc1de5b19a8839ab80696b9cb2a29, 266d3dd8b757b48a576e90f018b51f7b7563cc32 |
| Linux/Linuxgeneric | 2.6.34 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.