Bug 2546476 (CVE-2026-98252) - CVE-2026-98252 kernel: RDMA/core: fix refcount bug in iwpm_get_nlmsg_request()
Summary: CVE-2026-98252 kernel: RDMA/core: fix refcount bug in iwpm_get_nlmsg_request()
Keywords:
Status: NEW
Alias: CVE-2026-98252
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-06 09:27 UTC by OSIDB Bzimport
Modified: 2026-10-10 17:35 UTC (History)
17 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-10-06 09:27:24 UTC 
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().
Comment 1 gkamathe 2026-10-10 17:28:03 UTC 
Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98252.mbox
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