SECUFOCUSNOW
Home›CVE index›CVE-2026-64372
Review reviewHigh

CVE-2026-64372

Linux

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 outp...

CVSS
7.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2026.07.25
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.8

Vulnerability overview

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 outp...

Affected product and versions

Product
Linux
Affected versions
>= 0f1d683fb35d6c6f49ef696c95757f3970682a0e < 8e454e9d0bc03446d610ee49abec9dfd424f6541, >= 0f1d683fb35d6c6f49ef696c95757f3970682a0e < 632666a63116d8061c62a988d1ca39dcd6d27c9b, >= 0f1d683fb35d6c6f49ef696c95757f3970682a0e < 5cdb25f144b101083d8bf3fd023ad87fbe6850d7, >= 0f1d683fb35d6c6f49ef696c95757f3970682a0e < 982c9f92d57bda2b769851ff6d90d43dcf5f3734, >= 0f1d683fb35d6c6f49ef696c95757f3970682a0e < a36ca93a8ba57464e521d70a337d37f069064111, >= 0f1d683fb35d6c6f49ef696c95757f3970682a0e < 6ba6f6783be2ffeb2cbcdc9321c4b9f708f796f7, >= 0f1d683fb35d6c6f49ef696c95757f3970682a0e < 0e3c739a2f6fc1de5b19a8839ab80696b9cb2a29, >= 0f1d683fb35d6c6f49ef696c95757f3970682a0e < 266d3dd8b757b48a576e90f018b51f7b7563cc32, >= 2.6.34
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Not available