CVE-2026-64377 cpufreq: qcom-cpufreq-hw: Fix possible double free
A double free vulnerability in the Qualcomm cpufreq hardware driver allows attackers to cause system crashes or potentially execute arbitrary code.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-64377?
CVE-2026-64377 is a high-severity use after free vulnerability in Linux kernel, published on 25 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
cpufreq: qcom-cpufreq-hw: Fix possible double free
qcom_cpufreq.data is allocated with devm_kzalloc() in probe() as an array of per-domain data. qcom_cpufreq_hw_cpu_init() stores a pointer to one element of this array in policy->driver_data.
qcom_cpufreq_hw_cpu_exit() currently calls kfree() on policy->driver_data. This is not valid because the memory is devm-managed. For the first domain, this can free the devm-managed allocation while the devres entry is still active, leading to a possible double free when the platform device is later detached. For other domains, the pointer may refer to an element inside the array rather than the allocation base.
Remove the kfree(data) call and let devres release qcom_cpufreq.data.
This issue was found by a static analysis tool I am developing.
Weakness: CWE-415
Which versions are affected by CVE-2026-64377?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-64377?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-64377 being exploited?
There is no known exploitation of CVE-2026-64377 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-93692, BELL-CVE-2026-64377, DEBIAN-CVE-2026-64377, GHSA-9gw4-rc8j-j633, ROOT-OS-UBUNTU-2204-CVE-2026-64377, UBUNTU-CVE-2026-64377.