CVE-2026-76925Hinoki check available

Arbitrary file manipulation via privileged chmod race

Published Sep 4, 2026 · Updated Sep 4, 2026

TOCTOU in Flatpak on Red Hat Enterprise Linux 7 through 10 allows local users to manipulate or disclose arbitrary files. The SystemHelper Deploy() path performs a privileged chmod before validating the OSTree repository, leaving a window in which a symlink can be redirected to another file. Exploitation requires local access and winning that deployment race; successful attacks are bounded to privileged file manipulation or information disclosure.

CVSS severityUnavailable
Unscored
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

TOCTOU in Flatpak on Red Hat Enterprise Linux 7 through 10 allows local users to manipulate or disclose arbitrary files. The SystemHelper Deploy() path performs a privileged chmod before validating the OSTree repository, leaving a window in which a symlink can be redirected to another file. Exploitation requires local access and winning that deployment race; successful attacks are bounded to privileged file manipulation or information disclosure.

The record

CVE
CVE-2026-76925
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
389 Directory Server
Product
Red Hat Enterprise Linux 10
Classifications
CWE-362, T1068
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?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

389 Directory Server · Red Hat Enterprise Linux 10Affected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 7Affected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 9Affected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 8Affected versions are unavailable in this record.

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)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T1068Exploitation for Privilege Escalation

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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