NULL Pointer Dereference in Linux kernel - CVE-2026-23242
Published: March 20, 2026
Vulnerability identifier: #VU124209
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-2026-23242
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 the RDMA/siw component when processing incoming RDMA packets. A local user can trigger improper error handling to cause a denial of service.
Exploitation requires access to RDMA subsystem and the ability to send crafted packets over TCP. The vulnerability affects the siw (Soft iWarp) driver in the Linux kernel.
How to mitigate CVE-2026-23242
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/14ab3da122bd18920ad57428f6cf4fade8385142
- https://git.kernel.org/stable/c/714c99e1dc8f85f446e05be02ba83972e981a817
- https://git.kernel.org/stable/c/8564dcc12fbb372d984ab45768cae9335777b274
- https://git.kernel.org/stable/c/87b7a036d2c73d5bb3ae2d47dee23de465db3355
- https://git.kernel.org/stable/c/ab61841633d10e56a58c1493a262f0d02dba2f5e
- https://git.kernel.org/stable/c/ab957056192d6bd068b3759cb2077d859cca01f0
- https://git.kernel.org/stable/c/ce025f7f5d070596194315eb2e4e89d568b8a755
- https://git.kernel.org/stable/c/ffba40b67663567481fa8a1ed5d2da36897c175d