CVE-2022-49756 phy: usb: sunplus: Fix potential null-ptr-deref in sp_usb_phy_probe()

What is CVE-2022-49756?

CVE-2022-49756 is a medium-severity vulnerability in Linux kernel, published on 27 Mar 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:

phy: usb: sunplus: Fix potential null-ptr-deref in sp_usb_phy_probe()

sp_usb_phy_probe() will call platform_get_resource_byname() that may fail and return NULL. devm_ioremap() will use usbphy->moon4_res_mem->start as input, which may causes null-ptr-deref. Check the ret value of platform_get_resource_byname() to avoid the null-ptr-deref.

Weakness: CWE-476

Which versions are affected by CVE-2022-49756?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2022-49756?

Apply the vendor's patch.

Is CVE-2022-49756 being exploited?

There is no known exploitation of CVE-2022-49756 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-2022-49756, GHSA-57pw-gf47-fr76, UBUNTU-CVE-2022-49756.