A flaw was found in Cockpit. An integer overflow vulnerability in the `do_lastlog()` function, specifically in the offset calculation for `lastlog` entries on ILP32 (Integer, Long, Pointer 32-bit) builds, can be exploited. A low-privileged authenticated user with a specially provisioned large User ID (UID) can cause the computed offset to wrap around. This allows the user to perform unauthorized reads and writes to other users' `lastlog` records, potentially disclosing or altering sensitive login accounting information.
Advisories

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Fixes

Solution

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Workaround

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History

Sat, 19 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Low


Fri, 18 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 18 Sep 2026 16:45:00 +0000

Type Values Removed Values Added
Description A flaw was found in Cockpit. An integer overflow vulnerability in the `do_lastlog()` function, specifically in the offset calculation for `lastlog` entries on ILP32 (Integer, Long, Pointer 32-bit) builds, can be exploited. A low-privileged authenticated user with a specially provisioned large User ID (UID) can cause the computed offset to wrap around. This allows the user to perform unauthorized reads and writes to other users' `lastlog` records, potentially disclosing or altering sensitive login accounting information.
Title Cockpit: integer overflow in `do_lastlog()` offset calculation can misaddress `lastlog` entries on ilp32 builds
First Time appeared Redhat
Redhat enterprise Linux
Redhat openshift Devspaces
Weaknesses CWE-787
CPEs cpe:/a:redhat:openshift_devspaces:3
cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
Redhat openshift Devspaces
References
Metrics cvssV3_1

{'score': 3.6, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-09-18T17:09:57.106Z

Reserved: 2026-09-14T20:35:27.812Z

Link: CVE-2026-91142

cve-icon Vulnrichment

Updated: 2026-09-18T17:09:51.291Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-18T17:17:05.283

Modified: 2026-09-18T19:06:08.407

Link: CVE-2026-91142

cve-icon Redhat

Severity : Low

Publid Date: 2026-09-18T16:27:00Z

Links: CVE-2026-91142 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses