CVE-2026-89609

Unspecified impact via unlocked daemon queue cleanup

Published Sep 11, 2026 · Updated Sep 11, 2026

A race condition in Linux eCryptFS allows attackers to cause unspecified impact during encrypted-filesystem daemon teardown. ecryptfs_exorcise_daemon() moves queued message contexts to the free list without holding ecryptfs_msg_ctx_lists_mux, racing with other global list users. The public kernel record does not identify a reliable trigger, required privileges, or a more specific consequence.

CVSS severityUnavailable
Unscored
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A race condition in Linux eCryptFS allows attackers to cause unspecified impact during encrypted-filesystem daemon teardown. ecryptfs_exorcise_daemon() moves queued message contexts to the free list without holding ecryptfs_msg_ctx_lists_mux, racing with other global list users. The public kernel record does not identify a reliable trigger, required privileges, or a more specific consequence.

The record

CVE
CVE-2026-89609
Published
Sep 11, 2026
Updated
Sep 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-362
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 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=2.6.26
  2. Affected versionversion=f66e883eb6186bc43a79581b67aff7d1a69d0ff1 <0d9636ecba34bd553ecf19049f7705505aea62fd
  3. Affected versionversion=f66e883eb6186bc43a79581b67aff7d1a69d0ff1 <4c02acbe0a2692ca9991c51e62bbe6d6b59dac31
  4. Affected versionversion=f66e883eb6186bc43a79581b67aff7d1a69d0ff1 <779972513c2fa8c7938e54976f686091dafff22f
  5. Affected versionversion=f66e883eb6186bc43a79581b67aff7d1a69d0ff1 <7e48afafe7abc275f7b6916613bb18b821e7d94a

What conditions does exploitation require?

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

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.26; version=f66e883eb6186bc43a79581b67aff7d1a69d0ff1 <0d9636ecba34bd553ecf19049f7705505aea62fd; version=f66e883eb6186bc43a79581b67aff7d1a69d0ff1 <4c02acbe0a2692ca9991c51e62bbe6d6b59dac31; version=f66e883eb6186bc43a79581b67aff7d1a69d0ff1 <779972513c2fa8c7938e54976f686091dafff22f; version=f66e883eb6186bc43a79581b67aff7d1a69d0ff1 <7e48afafe7abc275f7b6916613bb18b821e7d94a

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)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

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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