CVE-2022-50040 net: dsa: sja1105: fix buffer overflow in sja1105_setup_devlink_regions()
A buffer overflow in the sja1105 DSA driver allows attackers to cause a denial of service or potentially execute code via negative array indexing.
- 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-2022-50040?
CVE-2022-50040 is a high-severity memory corruption vulnerability in Linux kernel, published on 18 Jun 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:
net: dsa: sja1105: fix buffer overflow in sja1105_setup_devlink_regions()
If an error occurs in dsa_devlink_region_create(), then 'priv->regions' array will be accessed by negative index '-1'.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Weakness: CWE-787
Which versions are affected by CVE-2022-50040?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-50040?
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-2022-50040 being exploited?
There is no known exploitation of CVE-2022-50040 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-50040, GHSA-hvwq-g76h-7prv, UBUNTU-CVE-2022-50040.