CVE-2024-36974 net/sched: taprio: always validate TCA_TAPRIO_ATTR_PRIOMAP
A missing validation in the Linux kernel taprio scheduler allows local attackers to inject arbitrary data, potentially leading to code execution or privilege escalation.
- 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-2024-36974?
CVE-2024-36974 is a high-severity missing authorization vulnerability in Linux kernel, published on 18 Jun 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:
net/sched: taprio: always validate TCA_TAPRIO_ATTR_PRIOMAP
If one TCA_TAPRIO_ATTR_PRIOMAP attribute has been provided, taprio_parse_mqprio_opt() must validate it, or userspace can inject arbitrary data to the kernel, the second time taprio_change() is called.
First call (with valid attributes) sets dev->num_tc to a non zero value.
Second call (with arbitrary mqprio attributes) returns early from taprio_parse_mqprio_opt() and bad things can happen.
Which versions are affected by CVE-2024-36974?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-36974?
Apply the vendor's patch.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2024-36974 being exploited?
There is no known exploitation of CVE-2024-36974 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2024-36974, DEBIAN-CVE-2024-36974, GHSA-rx99-hq7r-6g3r, UBUNTU-CVE-2024-36974.