CVE-2026-80880Hinoki check available

Unspecified impact via in-place ODP re-registration race

Published Sep 4, 2026 · Updated Sep 4, 2026

A race condition in the Linux kernel IB/mlx5 driver allows local users to trigger unsafe implicit ODP memory-region re-registration. The rereg_mr path changes a parent memory key in place even though implicit ODP child keys require rebuilding the entire registration; without a translation request, it also fails to allocate a new memory region through mlx5_ib_reg_user_mr(). Exploitation requires mlx5 RDMA hardware, an implicit ODP registration, and local access to re-register it; the public record does not state a resulting crash, disclosure, or privilege gain.

CVSS severityUnavailable
Unscored
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

A race condition in the Linux kernel IB/mlx5 driver allows local users to trigger unsafe implicit ODP memory-region re-registration. The rereg_mr path changes a parent memory key in place even though implicit ODP child keys require rebuilding the entire registration; without a translation request, it also fails to allocate a new memory region through mlx5_ib_reg_user_mr(). Exploitation requires mlx5 RDMA hardware, an implicit ODP registration, and local access to re-register it; the public record does not state a resulting crash, disclosure, or privilege gain.

The record

CVE
CVE-2026-80880
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 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=5.11
  2. Affected versionversion=ef3642c4f54d3493c92c71faf46139b2473bc532 <5d02b9a2efd11d28d2a8feac7769686b1b871d9c
  3. Affected versionversion=ef3642c4f54d3493c92c71faf46139b2473bc532 <94f7e50eb6b2ce7fbd9aeac1db22460d2013a3fb
  4. Affected versionversion=ef3642c4f54d3493c92c71faf46139b2473bc532 <cbc9982c8573fb9e35040063aa78c8ebe768a1ff
  5. Affected versionversion=ef3642c4f54d3493c92c71faf46139b2473bc532 <d4f84bfa089fe71f775d25beb29303e844494c25
  6. Affected versionversion=ef3642c4f54d3493c92c71faf46139b2473bc532 <eb7cb798e563b3f3b3baeb9cc6f7455764267e50
  7. Affected versionversion=ef3642c4f54d3493c92c71faf46139b2473bc532 <ee7a8335069150c3f1893a697ab30bbeca00d796
  8. Affected versionversion=ef3642c4f54d3493c92c71faf46139b2473bc532 <ee914ef54a7e707453ecb43eb30fb0a5c6dd0d69

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=5.11; version=ef3642c4f54d3493c92c71faf46139b2473bc532 <5d02b9a2efd11d28d2a8feac7769686b1b871d9c; version=ef3642c4f54d3493c92c71faf46139b2473bc532 <94f7e50eb6b2ce7fbd9aeac1db22460d2013a3fb; version=ef3642c4f54d3493c92c71faf46139b2473bc532 <cbc9982c8573fb9e35040063aa78c8ebe768a1ff; version=ef3642c4f54d3493c92c71faf46139b2473bc532 <d4f84bfa089fe71f775d25beb29303e844494c25; version=ef3642c4f54d3493c92c71faf46139b2473bc532 <eb7cb798e563b3f3b3baeb9cc6f7455764267e50; version=ef3642c4f54d3493c92c71faf46139b2473bc532 <ee7a8335069150c3f1893a697ab30bbeca00d796; version=ef3642c4f54d3493c92c71faf46139b2473bc532 <ee914ef54a7e707453ecb43eb30fb0a5c6dd0d69

Published CVSS scores

No CVSS assessment is available in this record.

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.

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

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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