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Fencer Vulns
medium 4.2

CVE-2026-1484 json

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

published 2026-01-27 9 mo ago modified 2026-11-06 3 d ago also EUVD-2026-4825

cvss
4.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 27%
public exploits
0
none known

Summary

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.

Patch / fix

  • Siemens RUGGEDCOM RST2428P V4.0
  • glib2.0 Debian 12 2.74.6-2+deb12u9
  • glib2.0 Debian 13 2.84.4-3~deb13u3
  • glib2.0 Debian 14 2.86.3-5

debian advisories DEBIAN-CVE-2026-1484

  • glib2.0 Ubuntu 22.04 LTS 2.72.4-0ubuntu2.9
  • glib2.0 Ubuntu 24.04 LTS 2.80.0-6ubuntu3.8
  • glib2.0 Ubuntu 25.10 2.86.0-2ubuntu0.3
  • glib2.0 Ubuntu 26.04 LTS 2.87.2-2

ubuntu advisories UBUNTU-CVE-2026-1484

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • glib2 Linux Micro 6.1 2.78.6-slfo.1.1_6.1
  • glib2 Linux Micro 6.0 2.76.2-12.1
  • glib2 SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Basesystem 15 SP7 +1 more 2.78.6-150600.4.35.1
  • glib2 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 2.84.4-160000.2.1
  • glib2 SLE Micro 5.2 2.62.6-150200.3.42.1
  • glib2 SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 2.48.2-12.58.1

suse advisories SUSE-SU-2026:20493-1SUSE-SU-2026:20446-1SUSE-SU-2026:0373-1SUSE-SU-2026:0372-1SUSE-SU-2026:20210-1SUSE-SU-2026:20221-1

  • glib2 openSUSE Leap 16.0 2.84.4-160000.2.1
  • glib2 openSUSE Tumbleweed 2.86.3-3.1

opensuse advisories openSUSE-SU-2026:20150-1openSUSE-SU-2026:10111-1

  • glib Azure Linux 3.0 2.78.6-7

azure linux advisories AZL-75920

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-1484 updated cvss 4.2

Glib: Integer Overflow Leading to Buffer Underflow and Out-of-Bounds Write in GLib g_base64_encode()

  • Red Hat Enterprise Linux 6 glib2 Red Hat Enterprise Linux 7 glib2, glib2-fam, glib2-tests Red Hat Enterprise Linux 8 glib2, librsvg2, glib2-fam, glib2-tests, mingw-glib2, mingw32-glib2, +2 more Red Hat Enterprise Linux 9 bootc, glib2, librsvg2, glib2-tests, mingw-glib2, mingw32-glib2, +3 more Red Hat Enterprise Linux 10 bootc, glib2, loupe, papers, rpm-ostree, mingw-glib2, +3 more
    affected: workaround, no fix available “Fix deferred”
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-core-bff-rhel9, rhoai/odh-dashboard-rhel9, rhoai/odh-mod-arch-maas-rhel9, rhoai/odh-mod-arch-automl-rhel9, rhoai/odh-mod-arch-gen-ai-rhel9, rhoai/odh-mod-arch-mlflow-rhel9, +6 more
    under investigation
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-mlflow-rhel9, rhoai/odh-kube-rbac-proxy-rhel9, rhoai/odh-maas-controller-rhel9, rhoai/odh-mlflow-operator-rhel9, rhoai/odh-model-controller-rhel9, rhoai/odh-ogx-k8s-operator-rhel9, +14 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
9 mo ago

Exploit prediction

0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.2 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat OpenShift AI (RHOAI)
  • Siemens RUGGEDCOM RST2428P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.