NULL pointer dereference in Linux kernel - CVE-2026-31425
Published: April 14, 2026
Vulnerability identifier: #VU125853
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-31425
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a null pointer dereference in rds_ib_get_mr() when processing sendmsg() requests with the RDS_CMSG_RDMA_MAP control message on a connection before IB connection establishment. A local user can send a specially crafted sendmsg request to cause a denial of service.
The issue occurs on a fresh outgoing connection before the rdma_cm_id and queue pair have been created.
How to mitigate CVE-2026-31425
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/23e07c340c445f0ebff7757ba15434cb447eb662
- https://git.kernel.org/stable/c/450ec93c0f172374acbf236f1f5f02d53650aa2d
- https://git.kernel.org/stable/c/47de5b73db3b88f45c107393f26aeba26e9e8fae
- https://git.kernel.org/stable/c/6b0a8de67ac0c74e1a7df92b73c862cb36780dfc
- https://git.kernel.org/stable/c/a54ecccfae62c5c85259ae5ea5d9c20009519049
- https://git.kernel.org/stable/c/a5bfd14c9a299e6db4add4440430ee5e010b03ad