CVE-2026-16118
Publication date 17 July 2026
Last updated 21 September 2026
Ubuntu priority
Description
A flaw was found in xdgmime. A heap-based buffer overflow can be triggered in _xdg_mime_magic_parse_magic_line() in the xdgmimemagic.c file on little-endian systems when an attacker-controlled MIME magic file in a user-writable XDG data location (e.g., in the $XDG_DATA_HOME/mime/magic path) is parsed by an application performing MIME type detection (e.g., via g_content_type_guess()). When performing byte-swap, incorrect pointer arithmetic on the write side causes an out-of-bounds write of 2 bytes, resulting in an application crash or memory corruption.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| glib2.0 | 26.04 LTS resolute |
Fixed 2.88.0-1ubuntu0.1
|
| 24.04 LTS noble |
Fixed 2.80.0-6ubuntu3.9
|
|
| 22.04 LTS jammy |
Fixed 2.72.4-0ubuntu2.10
|
|
| 20.04 LTS focal |
Fixed 2.64.6-1~ubuntu20.04.9+esm2
|
|
| 18.04 LTS bionic |
Fixed 2.56.4-0ubuntu0.18.04.9+esm6
|
|
| 16.04 LTS xenial |
Fixed 2.48.2-0ubuntu4.8+esm6
|
|
| 14.04 LTS trusty |
Fixed 2.40.2-0ubuntu1.1+esm8
|
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CVSS version: CVSS v3.0
Base score
7.1 · High
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
References
Related Ubuntu Security Notices (USN)
- USN-8794-1
- GLib vulnerabilities
- 21 September 2026