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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 BDUCWE-787
NVD MITRE
4.2CVSSMEDIUM
EPSS Score
0.3%
Top 78.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:RS:UC:NI:LA:L
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
Open in CVSS calculator →

Weaknesses

CWE-787

Affected Products

Red Hat Enterprise LinuxRed Hat Inc.
On-premOS
Operating Systems / linux-distro
Astra Linux Special EditionООО «РусБИТех-Астра»
On-premOS
Operating Systems / linux-distro
GlibThe GNOME Project
LibraryLibrary
OSS Libraries / generic-library
Platform V SberLinux OS ServerАО «СберТех»
On-premOS
Operating Systems / linux-distro
Red Hat Enterprise Linux 10Red Hat
On-premOS
Operating Systems / linux-distro
red hat inc.commercialUSOperating Systemsaka red hat
ооо «русбитех-астра»commercialRUOperating Systemsaka rusbitech-astra
the gnome projectoss-projectOSS Librariesaka glib, gdkpixbuf, libgsf
ао «сбертех»commercialRUOperating Systemsaka ao sbertech, сбертех
red hatcommercialUSOperating Systemsaka red hat
and 4 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available
Workaround Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

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 5 more references View all →

Timeline

Published
Jan 27, 2026
Last Updated
Jun 2, 2026

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