CVE-2022-49787 mmc: sdhci-pci: Fix possible memory leak caused by missing pci_dev_put()
A missing reference count decrement in the Linux kernel SDHCI PCI driver can cause a memory leak, potentially leading to denial of service.
- 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-2022-49787?
CVE-2022-49787 is a medium-severity memory corruption vulnerability in Linux kernel, published on 1 May 2025. 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:
mmc: sdhci-pci: Fix possible memory leak caused by missing pci_dev_put()
pci_get_device() will increase the reference count for the returned pci_dev. We need to use pci_dev_put() to decrease the reference count before amd_probe() returns. There is no problem for the 'smbus_dev == NULL' branch because pci_dev_put() can also handle the NULL input parameter case.
Weakness: CWE-401
Which versions are affected by CVE-2022-49787?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-49787?
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-2022-49787 being exploited?
There is no known exploitation of CVE-2022-49787 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-49787, GHSA-f248-rm72-p5mx, UBUNTU-CVE-2022-49787.