What’s Vulnerable › Vulnerabilities

CVE-2026-91142: Cockpit: cockpit: unauthorized modification of login records via integer overflow

• Severity: low (CVSS 3.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-18 · updated 2026-10-16
• Weakness: CWE-190

Description

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.

Affected products

• Red Hat Enterprise Linux 10: all versions
• Red Hat Enterprise Linux 7: all versions
• Red Hat Enterprise Linux 8: all versions
• Red Hat Enterprise Linux 9: all versions
• Red Hat OpenShift Dev Spaces: all versions

References

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

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