CVE-2024-46834 ethtool: fail closed if we can't get max channel used in indirection tables
A missing check in the Linux kernel ethtool subsystem can lead to crashes when indirection table channels are out of bounds, causing denial of service.
- 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-2024-46834?
CVE-2024-46834 is a high-severity vulnerability in Linux kernel, published on 27 Sep 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:
ethtool: fail closed if we can't get max channel used in indirection tables
Commit 0d1b7d6c9274 ("bnxt: fix crashes when reducing ring count with active RSS contexts") proves that allowing indirection table to contain channels with out of bounds IDs may lead to crashes. Currently the max channel check in the core gets skipped if driver can't fetch the indirection table or when we can't allocate memory.
Both of those conditions should be extremely rare but if they do happen we should try to be safe and fail the channel change.
Which versions are affected by CVE-2024-46834?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-46834?
Apply the vendor's patch.
Is CVE-2024-46834 being exploited?
There is no known exploitation of CVE-2024-46834 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-50207, AZL-50244, BELL-CVE-2024-46834, DEBIAN-CVE-2024-46834, GHSA-xrh8-p79x-xgf7, ROOT-OS-DEBIAN-11-CVE-2024-46834 and 3 more.