CVE-2021-47093 platform/x86: intel_pmc_core: fix memleak on registration failure

What is CVE-2021-47093?

CVE-2021-47093 is a medium-severity memory corruption vulnerability in Linux kernel, published on 4 Mar 2024. 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:

platform/x86: intel_pmc_core: fix memleak on registration failure

In case device registration fails during module initialisation, the platform device structure needs to be freed using platform_device_put() to properly free all resources (e.g. the device name).

Weakness: CWE-401

Which versions are affected by CVE-2021-47093?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2021-47093?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2021-47093 being exploited?

There is no known exploitation of CVE-2021-47093 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2021-47093, GHSA-g8fc-h787-jhv2, UBUNTU-CVE-2021-47093.