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Linux Kernel RDMA iwpm_get_nlmsg_request Refcount Race Produces a Local Use-After-Free

Last refreshed2026-10-10

Status: UPDATED  |  Advisory ID: CVE-2026-98252

Key Details

CVECVE-2026-98252
CVSS Score / Version7.0 (High) / CVSS v3.1
Updated2026-10-07
CVSS VectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS Proseattack vector is local; attack complexity is high; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected productsLinux Kernel

Affected Products, Subsystems & Sectors

VendorProductAffected VersionsPatch Status
LinuxLinux Kernel
SubsystemsOT Supporting Infrastructure
SectorsAll Sectors

What to Know

In the Linux kernel, the following vulnerability has been resolved:

RDMA/core: fix refcount bug in iwpm_get_nlmsg_request()

iwpm_get_nlmsg_request() initializes refcount _after_ list_add_tail()

making it accessible to global list where another CPU can kref_get()

on nlmsg_request causing a refcount "addition on 0" bug. Fix this

by initializing kref _before_ list_add_tail() so refcount for

nlmsg_request can be incremented/decremented normally. In addition,

also initialize every field before list_add_tail(). (NVD)

What to Do

Monitor Linux's web page for any future patch releases.

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-98252
CVEhttps://www.cve.org/CVERecord?id=CVE-2026-98252