CVE-2024-50145 octeon_ep: Add SKB allocation failures handling in __octep_oq_process_rx()
A missing null check in the Octeon Ethernet driver causes a kernel crash when memory allocation fails during packet processing.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-50145?
CVE-2024-50145 is a high-severity vulnerability in Linux kernel, published on 7 Nov 2024. 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:
octeon_ep: Add SKB allocation failures handling in __octep_oq_process_rx()
build_skb() returns NULL in case of a memory allocation failure so handle it inside __octep_oq_process_rx() to avoid NULL pointer dereference.
__octep_oq_process_rx() is called during NAPI polling by the driver. If skb allocation fails, keep on pulling packets out of the Rx DMA queue: we shouldn't break the polling immediately and thus falsely indicate to the octep_napi_poll() that the Rx pressure is going down. As there is no associated skb in this case, don't process the packets and don't push them up the network stack - they are skipped.
Helper function is implemented to unmmap/flush all the fragment buffers used by the dropped packet. 'alloc_failures' counter is incremented to mark the skb allocation error in driver statistics.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Weakness: CWE-476
Which versions are affected by CVE-2024-50145?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-50145?
Apply the vendor's patch.
Is CVE-2024-50145 being exploited?
There is no known exploitation of CVE-2024-50145 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-53391, BELL-CVE-2024-50145, DEBIAN-CVE-2024-50145, GHSA-f575-f7mf-jmpq, UBUNTU-CVE-2024-50145.