CVE-2026-80804Hinoki check available

System hang via missing NOFS context restoration

Published Sep 4, 2026 · Updated Sep 4, 2026

A deadlock in XFS in Linux 7.0, 7.1.0 through 7.1.10, and 7.2.0 allows attackers to hang the system via a failed transaction commit. In xfs_trans_roll, a failed __xfs_trans_commit clears the NOFS context, and the error path fails to restore it, allowing xfs_nondir_ilock_class and fs_reclaim to form a circular lock dependency. The Linux kernel CNA has not published how attackers can induce the commit failure, so reachability depends on access to that XFS transaction error path.

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

A deadlock in XFS in Linux 7.0, 7.1.0 through 7.1.10, and 7.2.0 allows attackers to hang the system via a failed transaction commit. In xfs_trans_roll, a failed __xfs_trans_commit clears the NOFS context, and the error path fails to restore it, allowing xfs_nondir_ilock_class and fs_reclaim to form a circular lock dependency. The Linux kernel CNA has not published how attackers can induce the commit failure, so reachability depends on access to that XFS transaction error path.

The record

CVE
CVE-2026-80804
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
Unavailable
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=7.0
  2. Affected versionversion=a1ca658d649a4d8972e2e21ac2625b633217e327 <0241ea5fb0fe86d2a673163b2f5815111aadc7f7
  3. Affected versionversion=a1ca658d649a4d8972e2e21ac2625b633217e327 <4d00a39c676274f4071b467e630565ac1e3ae0f2
  4. Affected versionversion=a1ca658d649a4d8972e2e21ac2625b633217e327 <b09198cf90ccf296970b774beea1c1ddb260f94c

What conditions does exploitation require?

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

What is affected?

The Linux Kernel Organization · Linuxversion=7.0; version=a1ca658d649a4d8972e2e21ac2625b633217e327 <0241ea5fb0fe86d2a673163b2f5815111aadc7f7; version=a1ca658d649a4d8972e2e21ac2625b633217e327 <4d00a39c676274f4071b467e630565ac1e3ae0f2; version=a1ca658d649a4d8972e2e21ac2625b633217e327 <b09198cf90ccf296970b774beea1c1ddb260f94c

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

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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