CVE-2024-55639 net: renesas: rswitch: avoid use-after-put for a device tree node
A use-after-free vulnerability in the Renesas rswitch network driver allows attackers to cause denial of service or potentially execute code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-55639?
CVE-2024-55639 is a high-severity use after free vulnerability in Linux kernel, published on 11 Jan 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:
net: renesas: rswitch: avoid use-after-put for a device tree node
The device tree node saved in the rswitch_device structure is used at several driver locations. So passing this node to of_node_put() after the first use is wrong.
Move of_node_put() for this node to exit paths.
Which versions are affected by CVE-2024-55639?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-55639?
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-2024-55639 being exploited?
There is no known exploitation of CVE-2024-55639 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2024-55639, DEBIAN-CVE-2024-55639, GHSA-ff8h-hp46-6356, UBUNTU-CVE-2024-55639.