CVE-2026-89605Hinoki check available

Message-processing exhaustion via unreleased contexts

Published Sep 11, 2026 · Updated Sep 11, 2026

Resource leak in the eCryptfs messaging layer in Linux from 2.6.26 allows attackers to exhaust reusable message contexts. ecryptfs_send_message_locked moves a context to the allocated list before calling ecryptfs_send_miscdev but fails to return it when that send fails. Reachability requires eCryptfs and a userspace-daemon send failure; public material does not establish attacker control over that failure or a broader system crash.

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

Resource leak in the eCryptfs messaging layer in Linux from 2.6.26 allows attackers to exhaust reusable message contexts. ecryptfs_send_message_locked moves a context to the allocated list before calling ecryptfs_send_miscdev but fails to return it when that send fails. Reachability requires eCryptfs and a userspace-daemon send failure; public material does not establish attacker control over that failure or a broader system crash.

The record

CVE
CVE-2026-89605
Published
Sep 11, 2026
Updated
Sep 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
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 <219644a3ad5518217b2d62cad6d2c36a2308c949
  3. Affected versionversion=f66e883eb6186bc43a79581b67aff7d1a69d0ff1 <47ce611cb13f0eefa550d5434c1afcd4217bfc3e
  4. Affected versionversion=f66e883eb6186bc43a79581b67aff7d1a69d0ff1 <654b7e79443f5ea90849f5c1cf70c0d94bd5b10e
  5. Affected versionversion=f66e883eb6186bc43a79581b67aff7d1a69d0ff1 <9319706316a8e79f374627554386d575a84b637f

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 <219644a3ad5518217b2d62cad6d2c36a2308c949; version=f66e883eb6186bc43a79581b67aff7d1a69d0ff1 <47ce611cb13f0eefa550d5434c1afcd4217bfc3e; version=f66e883eb6186bc43a79581b67aff7d1a69d0ff1 <654b7e79443f5ea90849f5c1cf70c0d94bd5b10e; version=f66e883eb6186bc43a79581b67aff7d1a69d0ff1 <9319706316a8e79f374627554386d575a84b637f

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.

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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)
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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