CVE-2023-53654 octeontx2-af: Add validation before accessing cgx and lmac
A missing validation in the Linux kernel octeontx2-af driver causes a kernel panic when accessing noncontiguous LMACs, leading to 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-2023-53654?
CVE-2023-53654 is a medium-severity vulnerability in Linux kernel, published on 7 Oct 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:
octeontx2-af: Add validation before accessing cgx and lmac
with the addition of new MAC blocks like CN10K RPM and CN10KB RPM_USX, LMACs are noncontiguous and CGX blocks are also noncontiguous. But during RVU driver initialization, the driver is assuming they are contiguous and trying to access cgx or lmac with their id which is resulting in kernel panic.
This patch fixes the issue by adding proper checks.
[ 23.219150] pc : cgx_lmac_read+0x38/0x70 [ 23.219154] lr : rvu_program_channels+0x3f0/0x498 [ 23.223852] sp : ffff000100d6fc80 [ 23.227158] x29: ffff000100d6fc80 x28: ffff00010009f880 x27: 000000000000005a [ 23.234288] x26: ffff000102586768 x25: 0000000000002500 x24: fffffffffff0f000
Which versions are affected by CVE-2023-53654?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2023-53654?
Apply the vendor's patch.
Is CVE-2023-53654 being exploited?
There is no known exploitation of CVE-2023-53654 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2023-53654, DEBIAN-CVE-2023-53654, GHSA-qw28-7x42-46v9, UBUNTU-CVE-2023-53654.