CVE-2023-52626 net/mlx5e: Fix operation precedence bug in port timestamping napi_poll context
An out-of-bounds read in the Linux kernel's mlx5e driver can cause crashes or leak memory contents due to incorrect pointer arithmetic.
- 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-2023-52626?
CVE-2023-52626 is a high-severity memory corruption vulnerability in Linux kernel, published on 26 Mar 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/mlx5e: Fix operation precedence bug in port timestamping napi_poll context
Indirection (*) is of lower precedence than postfix increment (++). Logic in napi_poll context would cause an out-of-bound read by first increment the pointer address by byte address space and then dereference the value. Rather, the intended logic was to dereference first and then increment the underlying value.
Weakness: CWE-125
Which versions are affected by CVE-2023-52626?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2023-52626?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2023-52626 being exploited?
There is no known exploitation of CVE-2023-52626 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2023-52626, DEBIAN-CVE-2023-52626, GHSA-qggq-gw32-wcq3, UBUNTU-CVE-2023-52626.