CVE-2026-96512

Out-of-window command execution via inherited timezone control

Published Sep 23, 2026 · Updated Sep 23, 2026

Time-based authorization bypass in Sudo in Red Hat Hardened Images allows local users to execute commands outside configured access windows. For NOTBEFORE or NOTAFTER timestamps without a trailing Z, Sudo evaluates local time using the caller-controlled TZ environment variable, allowing extreme offsets to shift the authorization window by about 25 hours. A local account and a matching time-restricted sudoers rule are required; authentication still applies, but commands remain usable after expiration or before activation.

CVSS severityUnavailable
Unscored
EPSS probability0.14%
Next 30 days · Oct 18, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Time-based authorization bypass in Sudo in Red Hat Hardened Images allows local users to execute commands outside configured access windows. For NOTBEFORE or NOTAFTER timestamps without a trailing Z, Sudo evaluates local time using the caller-controlled TZ environment variable, allowing extreme offsets to shift the authorization window by about 25 hours. A local account and a matching time-restricted sudoers rule are required; authentication still applies, but commands remain usable after expiration or before activation.

The record

CVE
CVE-2026-96512
Published
Sep 23, 2026
Updated
Sep 23, 2026
Vendor
Commonhaus Foundation
Product
Red Hat Hardened Images
Classifications
T1548.003
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 23, 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 privilegesauthenticated

What is affected?

Commonhaus Foundation · Red Hat Hardened ImagesAffected 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.

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

T1548.003Abuse Elevation Control Mechanism: Sudo and Sudo Caching

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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