CVE-2026-98355 RDMA/rtrs: guard against null kobj name
A null pointer dereference in the Linux kernel RDMA client allows local attackers to cause a denial of service via error handling paths.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-98355?
CVE-2026-98355 is a vulnerability in Linux, published on 6 Oct 2026. 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:
RDMA/rtrs: guard against null kobj name
In the client, if `init_path()` errors, the callee tries to clean up with `rtrs_clt_close_conns()`. However, this can lead to calling the event tracing code with `clt_path->kobj->name` being `NULL` and thus causing a null pointer dereference when trying to copy from it.
This just adds a guard to check that the name is not `NULL` before copying from it. The server appears to have a similar pattern.
Which versions are affected by CVE-2026-98355?
How do I fix CVE-2026-98355?
Apply the vendor's patch.
Is CVE-2026-98355 being exploited?
There is no known exploitation of CVE-2026-98355 in the wild and no public exploit code.
Sources
Also known as AZL-106209, BELL-CVE-2026-98355, DEBIAN-CVE-2026-98355, GHSA-w8vc-67qx-3qw3, UBUNTU-CVE-2026-98355.