Heap-based Buffer Overflow Affecting glib2.0 package, versions <2.88.0-1ubuntu0.1


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.28% (19th percentile)

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  • Snyk IDSNYK-UBUNTU2604-GLIB20-18295729
  • published5 Sept 2026
  • disclosed17 Jul 2026

Introduced: 17 Jul 2026

CVE-2026-16118  (opens in a new tab)
CWE-122  (opens in a new tab)

How to fix?

Upgrade Ubuntu:26.04 glib2.0 to version 2.88.0-1ubuntu0.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream glib2.0 package and not the glib2.0 package as distributed by Ubuntu. See How to fix? for Ubuntu:26.04 relevant fixed versions and status.

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.

References

CVSS Base Scores

version 3.1