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Vulnerabilities

Vulnerability · CVE-2026-98252

RDMA/core: fix refcount bug in iwpm_get_nlmsg_request()

Published Oct 6, 2026 · catalog updated Nov 4, 2026 · RDMA/core: fix refcount bug

Last checked Nov 4, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-98252. EPSS is 0.12%. Act only if a listed version of RDMA/core: fix refcount bug is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (RDMA/core: fix refcount bug).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.0
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.12%
Remediation
Not established
Affected products
Linux Kernel

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().

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Linux Kernel3.16.0 → 5.10.271; 5.11.0 → 5.15.222; 5.16.0 → 6.1.189

How to fix CVE-2026-98252

  • Upgrade

    CVE-2026-98252 lists a fix boundary at 5.10.271. Compare the installed build with that boundary before you change production.

  • Version check

    Seen in 3.16.0 → 5.10.271; 5.11.0 → 5.15.222; 5.16.0 → 6.1.189

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-98252. EPSS is 0.12%. Act only if a listed version of RDMA/core: fix refcount bug is installed.

Which versions are affected?

Compare what you have installed with Kernel 3.16.0 → 5.10.271; 5.11.0 → 5.15.222; 5.16.0 → 6.1.189. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.12%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 6, 2026 · OpenSSF OSV / OSV Scanner

    Detected

    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_req

  2. Nov 4, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    Kernel fixed in 5.10.271; Kernel fixed in 5.15.222; Kernel fixed in 6.1.189; Kernel fixed in 6.6.158

  3. Nov 4, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    Kernel fixed in 5.10.271; 5.11.0

  4. Nov 4, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    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_req

Sources

References

Freshness

Last verified in this catalog Nov 4, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgNov 4, 2026
  • OpenSSF OSV / OSV ScannerNov 4, 2026