CVE-2026-80744Hinoki check available

Kernel warning via expected ENOMEM rollback

Published Sep 3, 2026 · Updated Sep 3, 2026

Improper error handling in the Linux kernel allows attackers to trigger a warning during an nf_tables offload rollback. The nft_flow_rule_offload_abort function applies WARN_ON_ONCE to every rollback error, incorrectly treating an expected ENOMEM allocation failure as a kernel bug. Reachability requires an nf_tables transaction to enter the flow-offload rollback path while allocation fails; the documented consequence is a warning splat.

CVSS severityUnavailable
Unscored
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Improper error handling in the Linux kernel allows attackers to trigger a warning during an nf_tables offload rollback. The nft_flow_rule_offload_abort function applies WARN_ON_ONCE to every rollback error, incorrectly treating an expected ENOMEM allocation failure as a kernel bug. Reachability requires an nf_tables transaction to enter the flow-offload rollback path while allocation fails; the documented consequence is a warning splat.

The record

CVE
CVE-2026-80744
Published
Sep 3, 2026
Updated
Sep 3, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 3, 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=5.5
  2. Affected versionversion=63b48c73ff567bbab1f940d6e8f3f48607077a13 <09bda4b6df222fd1819e8f188c3a6e90caf546d3
  3. Affected versionversion=63b48c73ff567bbab1f940d6e8f3f48607077a13 <17c132e18ca5d1641ddbaed8d0e6ecfd1d38fa0b
  4. Affected versionversion=63b48c73ff567bbab1f940d6e8f3f48607077a13 <2319033c4bf8bdb275a9e4e1f7af9bf8a457ad79
  5. Affected versionversion=63b48c73ff567bbab1f940d6e8f3f48607077a13 <4a923fe60939a194777bc605036ce2147ab00c9d
  6. Affected versionversion=63b48c73ff567bbab1f940d6e8f3f48607077a13 <6ee3803c22b72508c5baf1e5aecb21301b714be0
  7. Affected versionversion=63b48c73ff567bbab1f940d6e8f3f48607077a13 <7ce9851be6f2b019e96e105a9de99715aec6deb4
  8. Affected versionversion=63b48c73ff567bbab1f940d6e8f3f48607077a13 <c23620a0fa5b1d80399f894c41a9f78bc29d6235
  9. Affected versionversion=63b48c73ff567bbab1f940d6e8f3f48607077a13 <d02f592064347e0c1e0d84f24941ad338838cc48

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=5.5; version=63b48c73ff567bbab1f940d6e8f3f48607077a13 <09bda4b6df222fd1819e8f188c3a6e90caf546d3; version=63b48c73ff567bbab1f940d6e8f3f48607077a13 <17c132e18ca5d1641ddbaed8d0e6ecfd1d38fa0b; version=63b48c73ff567bbab1f940d6e8f3f48607077a13 <2319033c4bf8bdb275a9e4e1f7af9bf8a457ad79; version=63b48c73ff567bbab1f940d6e8f3f48607077a13 <4a923fe60939a194777bc605036ce2147ab00c9d; version=63b48c73ff567bbab1f940d6e8f3f48607077a13 <6ee3803c22b72508c5baf1e5aecb21301b714be0; version=63b48c73ff567bbab1f940d6e8f3f48607077a13 <7ce9851be6f2b019e96e105a9de99715aec6deb4; version=63b48c73ff567bbab1f940d6e8f3f48607077a13 <c23620a0fa5b1d80399f894c41a9f78bc29d6235; version=63b48c73ff567bbab1f940d6e8f3f48607077a13 <d02f592064347e0c1e0d84f24941ad338838cc48

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

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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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