CVE-2026-89985Hinoki check available

Unspecified impact via incorrect memory-cgroup locking

Published Sep 16, 2026 · Updated Sep 16, 2026

A memory-cgroup locking flaw in Linux 7.1 allows attackers to cause unspecified impact via cross-node folio migration. mem_cgroup_migrate() and mem_cgroup_replace_folio() retain the source node's objcg after a folio moves, so LRU work locks a different memcg from the list being modified. Reachability requires a folio to migrate between nodes while object cgroups are being reparented; the published patch does not identify an externally observable consequence.

CVSS severityUnavailable
Unscored
EPSS probabilityUnavailable
No score available in this record
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

A memory-cgroup locking flaw in Linux 7.1 allows attackers to cause unspecified impact via cross-node folio migration. mem_cgroup_migrate() and mem_cgroup_replace_folio() retain the source node's objcg after a folio moves, so LRU work locks a different memcg from the list being modified. Reachability requires a folio to migrate between nodes while object cgroups are being reparented; the published patch does not identify an externally observable consequence.

The record

CVE
CVE-2026-89985
Published
Sep 16, 2026
Updated
Sep 16, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=7.1
  2. Affected versionversion=f1cf8d2f36dc369688bbe61ce064fbd829dbc9e1 <6165478eaa3094eaee1d5e33b12520064faf043d
  3. Affected versionversion=f1cf8d2f36dc369688bbe61ce064fbd829dbc9e1 <bf4ade7dbd76d4ec8697840e4ebb15ed77c5ec26

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=7.1; version=f1cf8d2f36dc369688bbe61ce064fbd829dbc9e1 <6165478eaa3094eaee1d5e33b12520064faf043d; version=f1cf8d2f36dc369688bbe61ce064fbd829dbc9e1 <bf4ade7dbd76d4ec8697840e4ebb15ed77c5ec26

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
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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