CVE-2026-89506
kernel: RDMA/uverbs: Add UVERBS_ATTR_UHW to UVERBS_METHOD_REG_MR
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 11, 2026
Updated · October 29, 2026
Description
A flaw was found in the Linux kernel's RDMA/uverbs component. A missing update to the UVERBS_METHOD_REG_MR ioctl allows a malicious userspace program to trigger a null pointer dereference in specific RDMA drivers (mthca, irdma, siw). This can lead to a system crash, resulting in a Denial of Service (DoS).
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 · NULL Pointer Dereference