CVE-2026-1484

Glib: integer overflow leading to buffer underflow and out-of-bounds write in glib g_base64_encode()

Published: Jan 27, 2026Updated: Jun 2, 2026 Sources: CVE List NVD BDU csafCWE-787

4.2MEDIUM

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:HAttack Complexity

High

PR:NPrivileges Required

None

UI:RUser Interaction

Required

Scope

S:UScope

Unchanged

Impact

C:NConfidentiality

None

I:LIntegrity

Low

A:LAvailability

Low

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Weaknesses

CWE-787

Affected Products

Red Hat Inc.

commercial·USaka Red Hat

Red Hat Enterprise Linux 10On-premOS

Operating Systems / linux-distro

ООО «РусБИТех-Астра»

commercial·RUaka rusbitech-astra

Astra Linux Special EditionOn-premOS

Operating Systems / linux-distro

The GNOME Project

oss-projectaka glib, gdkpixbuf, libgsf

GlibLibraryLibrary

OSS Libraries / generic-library

АО «СберТех»

commercial·RUaka ao sbertech, сбертех

Platform V SberLinux OS ServerOn-premOS

Operating Systems / linux-distro

and 5 more affected products View all →

Exploitability

Official Patch Available

Workaround Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Initial Access

Privilege Escalation

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References

https://access.redhat.com/security/cve/CVE-2026-1484

access.redhat.com

https://bugzilla.redhat.com/show_bug.cgi?id=2433259

bugzilla.redhat.com

https://gitlab.gnome.org/GNOME/glib/-/issues/3870

gitlab.gnome.org

and 156 more references View all →

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