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CVE.org (no NVD analysis yet)· CNA Linux

CVE-2026-98252: RDMA/core: fix refcount bug in iwpm_get_nlmsg_request()

Noroxi assessment

Priority: Monitor (action score 28/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.12% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: Linux Linux 117871cdb8927542abd7b65ce5995bf0265a8c05, 2fbac8a56004b6ce54fbfe845d4b25da6e0b55e8, 33fb59da49c4c3f5c2ec9f9d4447a56857a02c02; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.158.1-1.

Low priority for now. Upgrade to Linux Linux 117871cdb8927542abd7b65ce5995bf0265a8c05, 2fbac8a56004b6ce54fbfe845d4b25da6e0b55e8, 33fb59da49c4c3f5c2ec9f9d4447a56857a02c02; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.158.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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().

HighCVSS 7.0 · v3.1—No exploit Fix available
Published
Oct 6, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 1th percentile
CWE
—

Report tools

JSON

Action score

28

Monitor

Low priority for now.

CVSS
28 / 40 · 7.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CNA vs NVD score

NVD
—
CNA · Linux
7.0
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 3.16affected
    • 30dc5e63d6a5ad24894b5512d10b228d73645a44 and later · before 52c13c63bb3662c108244e7447055e30bf40244eaffected · git
    • 30dc5e63d6a5ad24894b5512d10b228d73645a44 and later · before 8a91609032d47e77bcb37bc8f6e88d89340d2709affected · git
    • 30dc5e63d6a5ad24894b5512d10b228d73645a44 and later · before ce8a379598bd4058081416abea4279fd05a95374affected · git
    • 30dc5e63d6a5ad24894b5512d10b228d73645a44 and later · before 2fbac8a56004b6ce54fbfe845d4b25da6e0b55e8affected · git
    • 30dc5e63d6a5ad24894b5512d10b228d73645a44 and later · before 88e429a4e9bac3d2138011c5ca06254331f2587faffected · git
    • 30dc5e63d6a5ad24894b5512d10b228d73645a44 and later · before e15eb536be4f646ce683d2867572b2200be877f7affected · git
    • 30dc5e63d6a5ad24894b5512d10b228d73645a44 and later · before 117871cdb8927542abd7b65ce5995bf0265a8c05affected · git
    • 30dc5e63d6a5ad24894b5512d10b228d73645a44 and later · before 33fb59da49c4c3f5c2ec9f9d4447a56857a02c02affected · git
    • before 3.16not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.190-16.1.190-1
Debian:12linux-6.12before 6.12.113-1~deb12u16.12.113-1~deb12u1
Debian:13linuxbefore 6.12.113-16.12.113-1
Debian:14linuxbefore 7.2.8-17.2.8-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-98250Oct 6, 2026 · nfsd: fix handling of NFSEXP_PNFS in the netlink codepath
    0Monitor
  • ← EarlierCVE-2026-98251Oct 6, 2026 · openvswitch: avoid reallocating confirmed conntrack labels
    31Monitor
  • Later →CVE-2026-98253Oct 6, 2026 · RDMA/ucma: Serialize join and leave on copy_to_user failure
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux117871cdb8927542abd7b65ce5995bf0265a8c05Vendor (CNA)
Linux Linux2fbac8a56004b6ce54fbfe845d4b25da6e0b55e8Vendor (CNA)
Linux Linux33fb59da49c4c3f5c2ec9f9d4447a56857a02c02Vendor (CNA)
Linux Linux52c13c63bb3662c108244e7447055e30bf40244eVendor (CNA)
Linux Linux88e429a4e9bac3d2138011c5ca06254331f2587fVendor (CNA)
Linux Linux8a91609032d47e77bcb37bc8f6e88d89340d2709Vendor (CNA)
Linux Linuxce8a379598bd4058081416abea4279fd05a95374Vendor (CNA)
Linux Linuxe15eb536be4f646ce683d2867572b2200be877f7Vendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.06.6.158.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux6.12.113-1 · Debian:13Package registry (OSV)
debian:linux7.2.8-1 · Debian:14Package registry (OSV)
debian:linux-6.126.12.113-1~deb12u1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. Fix recordedsame day
  3. TodayNov 2, 2026+27 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. CVSS— → 7
  2. Severity— → high
  3. Exploit maturity— → none
  4. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records