CVE-2026-82357 RT-Labs AB C-Open CANopen NULL pointer dereference
A remote attacker with CAN bus access can crash the device by triggering a NULL pointer dereference via the LSS protocol on misconfigured identity objects.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-82357?
CVE-2026-82357 is a high-severity vulnerability in RT-Labs AB C-Open, published on 1 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
RT-Labs AB C-Open CANopen contains a NULL pointer dereference if the LSS protocol is used to configure the device. An object defined by the user application may not have all required subindexes for object 0x1018. An unauthenticated, remote attacker with access to the CAN bus, through a compromised node for instance, can initiate the LSS protocol on a device with a misconfigured identity object and potentially crash the device. Fixed in 1.1.1.
Weakness: CWE-476
Which versions are affected by CVE-2026-82357?
How do I fix CVE-2026-82357?
No fix has been published for CVE-2026-82357 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-82357 being exploited?
There is no known exploitation of CVE-2026-82357 in the wild and no public exploit code.
Sources
Also known as GHSA-h298-2mcm-v4fm.