CVE-2026-15588
Publication date 20 July 2026
Last updated 7 August 2026
Ubuntu priority
Description
A denial-of-service and resource exhaustion vulnerability exists within the `GDBus` component of GLib. The `gdbusauth` authentication mechanism fails to enforce proper length limitations on data lines read from a client. An unauthenticated local or remote attacker can exploit this lack of input validation by sending excessively long streams of data, causing the application to consume massive amounts of system memory and CPU, potentially leading to a crash or system hang.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| glib2.0 | 26.04 LTS resolute |
Vulnerable
|
| 24.04 LTS noble |
Vulnerable
|
|
| 22.04 LTS jammy |
Vulnerable
|
|
| 20.04 LTS focal |
Vulnerable
|
|
| 18.04 LTS bionic |
Vulnerable
|
|
| 16.04 LTS xenial |
Vulnerable
|
|
| 14.04 LTS trusty |
Vulnerable
|
Severity score breakdown
CVSS version: CVSS v3.0
Base score
5.3 · Medium
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
References
Other references
- https://www.cve.org/CVERecord?id=CVE-2026-15588
- https://gitlab.gnome.org/GNOME/glib/-/issues/3985
- https://gitlab.gnome.org/GNOME/glib/-/merge_requests/5240
- https://gitlab.gnome.org/GNOME/glib/-/merge_requests/5241
- https://access.redhat.com/errata/RHSA-2026:39985
- https://access.redhat.com/errata/RHSA-2026:40485
- https://access.redhat.com/errata/RHSA-2026:42329
- https://access.redhat.com/security/cve/CVE-2026-15588
- https://bugzilla.redhat.com/show_bug.cgi?id=2499675