CVE-2026-92503Hinoki check available

Filesystem hang via EA-inode eviction deadlock

Published Sep 17, 2026 · Updated Sep 17, 2026

Deadlock in Linux kernel ext4 allows local users to hang filesystem operations via concurrent extended-attribute workloads. ext4_xattr_inode_cache_find() retains an mbcache entry while ext4_iget() waits for inode eviction, whose thread waits for that entry to be released. Triggering requires ea_inode enabled and overlapping inode eviction; the disclosed consequence is blocked filesystem work, not code execution.

CVSS severity4.7
Medium
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Deadlock in Linux kernel ext4 allows local users to hang filesystem operations via concurrent extended-attribute workloads. ext4_xattr_inode_cache_find() retains an mbcache entry while ext4_iget() waits for inode eviction, whose thread waits for that entry to be released. Triggering requires ea_inode enabled and overlapping inode eviction; the disclosed consequence is blocked filesystem work, not code execution.

The record

CVE
CVE-2026-92503
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=0752e7fb549d90c33b4d4186f11cfd25a556d1dd
  2. Affected versionversion=0a46ef234756dca04623b7591e8ebb3440622f0b <03438084a7b8621fb5c762dd3d04cff5f2630fb2
  3. Affected versionversion=0a46ef234756dca04623b7591e8ebb3440622f0b <7720fddd1fe344d14be258a2028f74ebf1569511
  4. Affected versionversion=111103907234bffd0a34fba070ad9367de058752
  5. Affected versionversion=6.10
  6. Affected versionversion=6.1.107 <6.2
  7. Affected versionversion=6.6.47 <6.7
  8. Affected versionversion=6.9.7 <6.10
  9. Affected versionversion=737fb7853acd5bc8984f6f42e4bfba3334be8ae1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=0752e7fb549d90c33b4d4186f11cfd25a556d1dd; version=0a46ef234756dca04623b7591e8ebb3440622f0b <03438084a7b8621fb5c762dd3d04cff5f2630fb2; version=0a46ef234756dca04623b7591e8ebb3440622f0b <7720fddd1fe344d14be258a2028f74ebf1569511; version=111103907234bffd0a34fba070ad9367de058752; version=6.10; version=6.1.107 <6.2; version=6.6.47 <6.7; version=6.9.7 <6.10; version=737fb7853acd5bc8984f6f42e4bfba3334be8ae1

Published CVSS scores

4.7Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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