CVE-2026-80856Hinoki check available

File-operation stalls via leaked invalidate lock

Published Sep 4, 2026 · Updated Sep 4, 2026

Denial of service in the Linux kernel FUSE subsystem allows local users to stall later file faults and truncates through a DAX setattr. fuse_do_setattr() returns directly when write_inode_now() fails after taking filemap_invalidate_lock(), leaving the invalidate rwsem held. Reachability requires a DAX FUSE file, truncate-related attribute changes, writeback, and a writeback failure such as a daemon EIO response.

CVSS severityUnavailable
Unscored
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Denial of service in the Linux kernel FUSE subsystem allows local users to stall later file faults and truncates through a DAX setattr. fuse_do_setattr() returns directly when write_inode_now() fails after taking filemap_invalidate_lock(), leaving the invalidate rwsem held. Reachability requires a DAX FUSE file, truncate-related attribute changes, writeback, and a writeback failure such as a daemon EIO response.

The record

CVE
CVE-2026-80856
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 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=5.10
  2. Affected versionversion=6ae330cad6ef22ab8347ea9e0707dc56a7c7363f <03cfeeb135428fa83f0791d3f8f94d9298cae695
  3. Affected versionversion=6ae330cad6ef22ab8347ea9e0707dc56a7c7363f <1758730d9eaa3c06cf415c3446d9f6eed9ed3eed
  4. Affected versionversion=6ae330cad6ef22ab8347ea9e0707dc56a7c7363f <8f14906ce9103ab8f2f1ebda45935a0d61b9d763
  5. Affected versionversion=6ae330cad6ef22ab8347ea9e0707dc56a7c7363f <92588d187ba4697a322e7aefe5d9e538a87d1cd2
  6. Affected versionversion=6ae330cad6ef22ab8347ea9e0707dc56a7c7363f <9afeca0d569c9fc89d758fe7a9339d1e8afb1546
  7. Affected versionversion=6ae330cad6ef22ab8347ea9e0707dc56a7c7363f <dd278d954c0e96a9cbd3cc491e07b8267d25f8d5
  8. Affected versionversion=6ae330cad6ef22ab8347ea9e0707dc56a7c7363f <e8457ebfd77a46e8d1210e8888ea914ad064558e
  9. Affected versionversion=6ae330cad6ef22ab8347ea9e0707dc56a7c7363f <ea9fea370b8de4ffd72e0ef89550415c15637787

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=5.10; version=6ae330cad6ef22ab8347ea9e0707dc56a7c7363f <03cfeeb135428fa83f0791d3f8f94d9298cae695; version=6ae330cad6ef22ab8347ea9e0707dc56a7c7363f <1758730d9eaa3c06cf415c3446d9f6eed9ed3eed; version=6ae330cad6ef22ab8347ea9e0707dc56a7c7363f <8f14906ce9103ab8f2f1ebda45935a0d61b9d763; version=6ae330cad6ef22ab8347ea9e0707dc56a7c7363f <92588d187ba4697a322e7aefe5d9e538a87d1cd2; version=6ae330cad6ef22ab8347ea9e0707dc56a7c7363f <9afeca0d569c9fc89d758fe7a9339d1e8afb1546; version=6ae330cad6ef22ab8347ea9e0707dc56a7c7363f <dd278d954c0e96a9cbd3cc491e07b8267d25f8d5; version=6ae330cad6ef22ab8347ea9e0707dc56a7c7363f <e8457ebfd77a46e8d1210e8888ea914ad064558e; version=6ae330cad6ef22ab8347ea9e0707dc56a7c7363f <ea9fea370b8de4ffd72e0ef89550415c15637787

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)
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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