---
id: CVE-2026-1484
title: >-
  Glib: integer overflow leading to buffer underflow and out-of-bounds write in
  glib g_base64_encode()
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 out…
severity: medium
cvss: 4.2
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L'
cvssSource: cna
cwe:
  - CWE-787
vendor: Red Hat
product: bootc
affected:
  - bootc (all versions)
  - glib2 (all versions)
  - glycin-loaders (all versions)
  - loupe (all versions)
  - mingw-glib2 (all versions)
  - papers (all versions)
  - rpm-ostree (all versions)
  - glib2 (all versions)
  - glib2 (all versions)
  - glib2 (all versions)
  - librsvg2 (all versions)
  - mingw-glib2 (all versions)
  - bootc (all versions)
  - glib2 (all versions)
  - librsvg2 (all versions)
  - mingw-glib2 (all versions)
  - rhoai/odh-ai-gateway-operator-rhel9
  - rhoai/odh-core-bff-rhel9
  - rhoai/odh-dashboard-operator-rhel9
  - rhoai/odh-dashboard-rhel9
  - rhoai/odh-data-science-pipelines-operator-controller-rhel9
  - rhoai/odh-kf-notebook-controller-rhel9
  - rhoai/odh-kserve-controller-rhel9
  - rhoai/odh-kserve-llmisvc-controller-rhel9
  - rhoai/odh-kserve-module-operator-rhel9
  - rhoai/odh-kuberay-operator-controller-rhel9
  - rhoai/odh-kube-rbac-proxy-rhel9
  - rhoai/odh-llama-stack-k8s-operator-rhel9
  - rhoai/odh-maas-controller-rhel9
  - rhoai/odh-mlflow-operator-rhel9
  - rhoai/odh-mlflow-rhel9
  - rhoai/odh-mod-arch-agent-ops-rhel9
  - rhoai/odh-mod-arch-automl-rhel9
  - rhoai/odh-mod-arch-autorag-rhel9
  - rhoai/odh-mod-arch-eval-hub-rhel9
  - rhoai/odh-mod-arch-gen-ai-rhel9
  - rhoai/odh-mod-arch-maas-rhel9
  - rhoai/odh-mod-arch-mlflow-rhel9
  - rhoai/odh-mod-arch-model-registry-rhel9
  - rhoai/odh-model-controller-rhel9
  - rhoai/odh-model-registry-operator-rhel9
  - rhoai/odh-model-serving-api-rhel9
  - rhoai/odh-notebook-controller-rhel9
  - rhoai/odh-ogx-k8s-operator-rhel9
  - rhoai/odh-ogx-module-operator-rhel9
  - rhoai/odh-training-operator-rhel9
  - rhoai/odh-trustyai-service-operator-rhel9
  - rhoai/odh-workbenches-operator-rhel9
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-01-27T15:11:56.910934Z'
published: '2026-01-27'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T07:51:41.152Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-1484'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-1484'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2433259'
    label: RHBZ#2433259
  - url: 'https://gitlab.gnome.org/GNOME/glib/-/issues/3870'
tags:
  - cve.org
epss: 0.00341
epssPercentile: 0.27788
ingestedAt: '2026-11-05T22:38:31.375Z'
---

## Overview

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.

## Affected

- `bootc (all versions)`
- `glib2 (all versions)`
- `glycin-loaders (all versions)`
- `loupe (all versions)`
- `mingw-glib2 (all versions)`
- `papers (all versions)`
- `rpm-ostree (all versions)`
- `glib2 (all versions)`
- `glib2 (all versions)`
- `glib2 (all versions)`
- `librsvg2 (all versions)`
- `mingw-glib2 (all versions)`
- `bootc (all versions)`
- `glib2 (all versions)`
- `librsvg2 (all versions)`
- `mingw-glib2 (all versions)`
- `rhoai/odh-ai-gateway-operator-rhel9`
- `rhoai/odh-core-bff-rhel9`
- `rhoai/odh-dashboard-operator-rhel9`
- `rhoai/odh-dashboard-rhel9`
- `rhoai/odh-data-science-pipelines-operator-controller-rhel9`
- `rhoai/odh-kf-notebook-controller-rhel9`
- `rhoai/odh-kserve-controller-rhel9`
- `rhoai/odh-kserve-llmisvc-controller-rhel9`
- `rhoai/odh-kserve-module-operator-rhel9`
- `rhoai/odh-kuberay-operator-controller-rhel9`
- `rhoai/odh-kube-rbac-proxy-rhel9`
- `rhoai/odh-llama-stack-k8s-operator-rhel9`
- `rhoai/odh-maas-controller-rhel9`
- `rhoai/odh-mlflow-operator-rhel9`
- `rhoai/odh-mlflow-rhel9`
- `rhoai/odh-mod-arch-agent-ops-rhel9`
- `rhoai/odh-mod-arch-automl-rhel9`
- `rhoai/odh-mod-arch-autorag-rhel9`
- `rhoai/odh-mod-arch-eval-hub-rhel9`
- `rhoai/odh-mod-arch-gen-ai-rhel9`
- `rhoai/odh-mod-arch-maas-rhel9`
- `rhoai/odh-mod-arch-mlflow-rhel9`
- `rhoai/odh-mod-arch-model-registry-rhel9`
- `rhoai/odh-model-controller-rhel9`
- `rhoai/odh-model-registry-operator-rhel9`
- `rhoai/odh-model-serving-api-rhel9`
- `rhoai/odh-notebook-controller-rhel9`
- `rhoai/odh-ogx-k8s-operator-rhel9`
- `rhoai/odh-ogx-module-operator-rhel9`
- `rhoai/odh-training-operator-rhel9`
- `rhoai/odh-trustyai-service-operator-rhel9`
- `rhoai/odh-workbenches-operator-rhel9`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

### Workarounds

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.