7.8
HIGH
CVSS 3.1
CVE-2026-64372
cpufreq: pcc: fix use-after-free and double free in _OSC evaluation
Overview
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.
Details
INFO
Published Date :
July 25, 2026, 10:17 a.m.
Last Modified :
Aug. 17, 2026, 5:17 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework
for assessing the severity of vulnerabilities in software and systems.
We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
Fix memory corruption by correctly managing buffer allocation and deallocation in ACPI evaluation.
- Ensure pointers are reset to NULL after freeing.
- Set length to ACPI_ALLOCATE_BUFFER after freeing.
- Apply kernel updates to resolve memory management issues.
- Test the fix to prevent double frees.
References
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-64372.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64372 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-64372
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-64372 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64372 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '0f1d683fb35d6c6f49ef696c95757f3970682a0e', 'lessThan': '8e454e9d0bc03446d610ee49abec9dfd424f6541', 'versionType': 'git'}, {'status': 'affected', 'version': '0f1d683fb35d6c6f49ef696c95757f3970682a0e', 'lessThan': '632666a63116d8061c62a988d1ca39dcd6d27c9b', 'versionType': 'git'}, {'status': 'affected', 'version': '0f1d683fb35d6c6f49ef696c95757f3970682a0e', 'lessThan': '5cdb25f144b101083d8bf3fd023ad87fbe6850d7', 'versionType': 'git'}, {'status': 'affected', 'version': '0f1d683fb35d6c6f49ef696c95757f3970682a0e', 'lessThan': '982c9f92d57bda2b769851ff6d90d43dcf5f3734', 'versionType': 'git'}, {'status': 'affected', 'version': '0f1d683fb35d6c6f49ef696c95757f3970682a0e', 'lessThan': 'a36ca93a8ba57464e521d70a337d37f069064111', 'versionType': 'git'}, {'status': 'affected', 'version': '0f1d683fb35d6c6f49ef696c95757f3970682a0e', 'lessThan': '6ba6f6783be2ffeb2cbcdc9321c4b9f708f796f7', 'versionType': 'git'}, {'status': 'affected', 'version': '0f1d683fb35d6c6f49ef696c95757f3970682a0e', 'lessThan': '0e3c739a2f6fc1de5b19a8839ab80696b9cb2a29', 'versionType': 'git'}, {'status': 'affected', 'version': '0f1d683fb35d6c6f49ef696c95757f3970682a0e', 'lessThan': '266d3dd8b757b48a576e90f018b51f7b7563cc32', 'versionType': 'git'}], 'programFiles': ['drivers/cpufreq/pcc-cpufreq.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.34'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.34', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/cpufreq/pcc-cpufreq.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '0f1d683fb35d6c6f49ef696c95757f3970682a0e', 'lessThan': '8e454e9d0bc03446d610ee49abec9dfd424f6541', 'versionType': 'git'}, {'status': 'affected', 'version': '0f1d683fb35d6c6f49ef696c95757f3970682a0e', 'lessThan': '632666a63116d8061c62a988d1ca39dcd6d27c9b', 'versionType': 'git'}, {'status': 'affected', 'version': '0f1d683fb35d6c6f49ef696c95757f3970682a0e', 'lessThan': '5cdb25f144b101083d8bf3fd023ad87fbe6850d7', 'versionType': 'git'}, {'status': 'affected', 'version': '0f1d683fb35d6c6f49ef696c95757f3970682a0e', 'lessThan': '982c9f92d57bda2b769851ff6d90d43dcf5f3734', 'versionType': 'git'}, {'status': 'affected', 'version': '0f1d683fb35d6c6f49ef696c95757f3970682a0e', 'lessThan': 'a36ca93a8ba57464e521d70a337d37f069064111', 'versionType': 'git'}, {'status': 'affected', 'version': '0f1d683fb35d6c6f49ef696c95757f3970682a0e', 'lessThan': '6ba6f6783be2ffeb2cbcdc9321c4b9f708f796f7', 'versionType': 'git'}, {'status': 'affected', 'version': '0f1d683fb35d6c6f49ef696c95757f3970682a0e', 'lessThan': '0e3c739a2f6fc1de5b19a8839ab80696b9cb2a29', 'versionType': 'git'}, {'status': 'affected', 'version': '0f1d683fb35d6c6f49ef696c95757f3970682a0e', 'lessThan': '266d3dd8b757b48a576e90f018b51f7b7563cc32', 'versionType': 'git'}], 'programFiles': ['drivers/cpufreq/pcc-cpufreq.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.34'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.34', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/cpufreq/pcc-cpufreq.c'], 'defaultStatus': 'affected'}] -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 27, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 25, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '0f1d683fb35d6c6f49ef696c95757f3970682a0e', 'lessThan': '8e454e9d0bc03446d610ee49abec9dfd424f6541', 'versionType': 'git'}, {'status': 'affected', 'version': '0f1d683fb35d6c6f49ef696c95757f3970682a0e', 'lessThan': '632666a63116d8061c62a988d1ca39dcd6d27c9b', 'versionType': 'git'}, {'status': 'affected', 'version': '0f1d683fb35d6c6f49ef696c95757f3970682a0e', 'lessThan': '5cdb25f144b101083d8bf3fd023ad87fbe6850d7', 'versionType': 'git'}, {'status': 'affected', 'version': '0f1d683fb35d6c6f49ef696c95757f3970682a0e', 'lessThan': '982c9f92d57bda2b769851ff6d90d43dcf5f3734', 'versionType': 'git'}, {'status': 'affected', 'version': '0f1d683fb35d6c6f49ef696c95757f3970682a0e', 'lessThan': 'a36ca93a8ba57464e521d70a337d37f069064111', 'versionType': 'git'}, {'status': 'affected', 'version': '0f1d683fb35d6c6f49ef696c95757f3970682a0e', 'lessThan': '6ba6f6783be2ffeb2cbcdc9321c4b9f708f796f7', 'versionType': 'git'}, {'status': 'affected', 'version': '0f1d683fb35d6c6f49ef696c95757f3970682a0e', 'lessThan': '0e3c739a2f6fc1de5b19a8839ab80696b9cb2a29', 'versionType': 'git'}, {'status': 'affected', 'version': '0f1d683fb35d6c6f49ef696c95757f3970682a0e', 'lessThan': '266d3dd8b757b48a576e90f018b51f7b7563cc32', 'versionType': 'git'}], 'programFiles': ['drivers/cpufreq/pcc-cpufreq.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.34'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.34', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/cpufreq/pcc-cpufreq.c'], 'defaultStatus': 'affected'}] Added 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. Added Reference https://git.kernel.org/stable/c/0e3c739a2f6fc1de5b19a8839ab80696b9cb2a29 Added Reference https://git.kernel.org/stable/c/266d3dd8b757b48a576e90f018b51f7b7563cc32 Added Reference https://git.kernel.org/stable/c/5cdb25f144b101083d8bf3fd023ad87fbe6850d7 Added Reference https://git.kernel.org/stable/c/632666a63116d8061c62a988d1ca39dcd6d27c9b Added Reference https://git.kernel.org/stable/c/6ba6f6783be2ffeb2cbcdc9321c4b9f708f796f7 Added Reference https://git.kernel.org/stable/c/8e454e9d0bc03446d610ee49abec9dfd424f6541 Added Reference https://git.kernel.org/stable/c/982c9f92d57bda2b769851ff6d90d43dcf5f3734 Added Reference https://git.kernel.org/stable/c/a36ca93a8ba57464e521d70a337d37f069064111
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.