A flaw was found in the GLib Base64 encoding routine when processing very large input data. Due to incorrect use of integer types during length calculation, the library may miscalculate buffer boundaries. This can cause memory writes outside the allocated buffer. Applications that process untrusted or extremely large Base64 input using GLib may crash or behave unpredictably.
History

Tue, 27 Jan 2026 14:00:00 +0000

Type Values Removed Values Added
Description A flaw was found in the GLib Base64 encoding routine when processing very large input data. Due to incorrect use of integer types during length calculation, the library may miscalculate buffer boundaries. This can cause memory writes outside the allocated buffer. Applications that process untrusted or extremely large Base64 input using GLib may crash or behave unpredictably.
Title Glib: integer overflow leading to buffer underflow and out-of-bounds write in glib g_base64_encode()
First Time appeared Redhat
Redhat enterprise Linux
Weaknesses CWE-787
CPEs cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:6
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
References
Metrics cvssV3_1

{'score': 4.2, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L'}


cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-01-27T15:12:08.672Z

Reserved: 2026-01-27T11:58:49.994Z

Link: CVE-2026-1484

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-01-27T14:15:56.050

Modified: 2026-01-27T14:59:34.073

Link: CVE-2026-1484

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.