CVE-2024-57932 gve: guard XDP xmit NDO on existence of xdp queues
A missing check in the GVE network driver allows a null pointer dereference or divide-by-zero error, causing a kernel crash when XDP queues are absent.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-57932?
CVE-2024-57932 is a critical vulnerability in Linux kernel, published on 21 Jan 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
gve: guard XDP xmit NDO on existence of xdp queues
In GVE, dedicated XDP queues only exist when an XDP program is installed and the interface is up. As such, the NDO XDP XMIT callback should return early if either of these conditions are false.
In the case of no loaded XDP program, priv->num_xdp_queues=0 which can cause a divide-by-zero error, and in the case of interface down, num_xdp_queues remains untouched to persist XDP queue count for the next interface up, but the TX pointer itself would be NULL.
The XDP xmit callback also needs to synchronize with a device transitioning from open to close. This synchronization will happen via the GVE_PRIV_FLAGS_NAPI_ENABLED bit along with a synchronize_net() call, which waits for any RCU critical sections at call-time to complete.
Weakness: CWE-369
Which versions are affected by CVE-2024-57932?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-57932?
Apply the vendor's patch.
Is CVE-2024-57932 being exploited?
There is no known exploitation of CVE-2024-57932 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2024-57932, DEBIAN-CVE-2024-57932, GHSA-4hjr-56f9-j54w, UBUNTU-CVE-2024-57932.