CVE-2026-91142

A flaw was found in Cockpit. An authenticated local user with a large user identifier (UID) can cause unauthorized modification and disclosure of login records. On 32-bit systems, an integer overflow during session accounting allows the user's login process to read or overwrite the legacy log entries of other accounts.

CVSS v3 3.6 LOW

3.6^/10

CVSS v3 : LOW

Vector :

Exploitability : 1.0 / Impact : 2.5

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-91142
https://bugzilla.redhat.com/show_bug.cgi?id=2479459

Configurations

No configuration.

History

16 Oct 2026, 18:19

Type	Values Removed	Values Added
CWE	~~CWE-787~~	CWE-190
Summary	(en) 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.	(en) A flaw was found in Cockpit. An authenticated local user with a large user identifier (UID) can cause unauthorized modification and disclosure of login records. On 32-bit systems, an integer overflow during session accounting allows the user's login process to read or overwrite the legacy log entries of other accounts.

18 Sep 2026, 17:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-18 17:17

Updated : 2026-10-16 18:19

NVD link : CVE-2026-91142

Mitre link : CVE-2026-91142

CVE.ORG link : CVE-2026-91142

JSON object : View

Products Affected

No product.

CWE

CWE-190

Integer Overflow or Wraparound

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