CVE-2026-90218Hinoki check available

Kernel warning via device-less RDMA resource registration

Published Sep 17, 2026 · Updated Sep 17, 2026

Linux 5.13 RDMA/cma error handling allows local users to trigger a kernel warning through asynchronous address resolution. The addr_handler() function calls rdma_restrack_add() even after cma_acquire_dev_by_src_ip() fails, passing a resource with a NULL device pointer to res_to_rt(). The path requires failed RDMA device acquisition; the published trace demonstrates a warning, not a crash or data access.

CVSS severity3.3
Low
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Linux 5.13 RDMA/cma error handling allows local users to trigger a kernel warning through asynchronous address resolution. The addr_handler() function calls rdma_restrack_add() even after cma_acquire_dev_by_src_ip() fails, passing a resource with a NULL device pointer to res_to_rt(). The path requires failed RDMA device acquisition; the published trace demonstrates a warning, not a crash or data access.

The record

CVE
CVE-2026-90218
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=073fdf539d4c022162db3d77a5afca1710f0de2d
  2. Affected versionversion=5.10.37 <5.10.270
  3. Affected versionversion=5.11.21 <5.12
  4. Affected versionversion=5.12.4 <5.13
  5. Affected versionversion=5.13
  6. Affected versionversion=c5ebaca402f5c5bd61ac8316feb2aa3a0be4d4a8 <1d7e55ea64dd15769318ba2e0fe0956db82ba3c3
  7. Affected versionversion=cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa <2a63cb9ea862ac7d947952b497eef6520853538c
  8. Affected versionversion=cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa <39e83bb77fc92344cd62a373b311f096d812e548
  9. Affected versionversion=cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa <544e40805dbb6cfe64916bd4c8b238fec585ac2a
  10. Affected versionversion=cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa <64a2bd4cfc16c24f0a0e6321a2fd00ffde3e0a5b
  11. Affected versionversion=cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa <9c80273d663959504957606b9a24fe901ee2a4a1
  12. Affected versionversion=cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa <c6d1ec4fbe56492bb88987d577f04a5fb6955f26
  13. Affected versionversion=cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa <f72957e0b31f2962f4c1089a9223f1206aa26983
  14. Affected versionversion=fa37a461bd6d9ee86e891ba3e4074a450e44c881

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=073fdf539d4c022162db3d77a5afca1710f0de2d; version=5.10.37 <5.10.270; version=5.11.21 <5.12; version=5.12.4 <5.13; version=5.13; version=c5ebaca402f5c5bd61ac8316feb2aa3a0be4d4a8 <1d7e55ea64dd15769318ba2e0fe0956db82ba3c3; version=cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa <2a63cb9ea862ac7d947952b497eef6520853538c; version=cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa <39e83bb77fc92344cd62a373b311f096d812e548; version=cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa <544e40805dbb6cfe64916bd4c8b238fec585ac2a; version=cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa <64a2bd4cfc16c24f0a0e6321a2fd00ffde3e0a5b; version=cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa <9c80273d663959504957606b9a24fe901ee2a4a1; version=cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa <c6d1ec4fbe56492bb88987d577f04a5fb6955f26; version=cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa <f72957e0b31f2962f4c1089a9223f1206aa26983; version=fa37a461bd6d9ee86e891ba3e4074a450e44c881

Published CVSS scores

3.3Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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