CVE-2026-91142 - Cockpit: integer overflow in `do_lastlog()` offset calculation can misaddress `lastlog` entries on ilp32 builds

CVE-2026-91142 - Cockpit: integer overflow in `do_lastlog()` offset calculation can misaddress `lastlog` entries on ilp32 builds

https://cvefeed.io/rssfeed/latest.atom / Fri, 09/18/2026 - 19:32
CVE ID :CVE-2026-91142
Published : Sept. 18, 2026, 4:44 p.m. | 24 minutes ago
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.
Severity: 3.6 | LOW
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