# CVE-2026-1484: glib2.0: A flaw was found in the GLib Base64 encoding routine when processing very large input data

CVE-2026-1484 is fixed in 14 products on 1 platform, first by gir1.2-girepository-3.0 2.80.0-6ubuntu3.8, released January 27, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-1484
- Priority: Routine
- CVSS: 4.2 (medium)
- EPSS: 0.0034
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 27, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | gir1.2-girepository-3.0 Ubuntu 24.04.5 LTS (noble) | 2.80.0-6ubuntu3.8 | [gir1.2-girepository-3.0 2.80.0-6ubuntu3.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gir1.2-girepository-3.0-2.80.0-6ubuntu3.8.md) | Jan 27, 2026 |
| Linux | gir1.2-girepository-3.0 Ubuntu 25.10 (questing) | 2.86.0-2ubuntu0.3 | [gir1.2-girepository-3.0 2.86.0-2ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-gir1.2-girepository-3.0-2.86.0-2ubuntu0.3.md) | Jan 27, 2026 |
| Linux | gir1.2-girepository-3.0 Ubuntu 26.04.1 LTS (resolute) | 2.87.2-2 | [gir1.2-girepository-3.0 2.87.2-2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gir1.2-girepository-3.0-2.87.2-2.md) | Jan 27, 2026 |
| Linux | gir1.2-glib-2.0 Ubuntu 24.04.5 LTS (noble) | 2.80.0-6ubuntu3.8 | [gir1.2-glib-2.0 2.80.0-6ubuntu3.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gir1.2-glib-2.0-2.80.0-6ubuntu3.8.md) | Jan 27, 2026 |
| Linux | gir1.2-glib-2.0 Ubuntu 25.10 (questing) | 2.86.0-2ubuntu0.3 | [gir1.2-glib-2.0 2.86.0-2ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-gir1.2-glib-2.0-2.86.0-2ubuntu0.3.md) | Jan 27, 2026 |
| Linux | gir1.2-glib-2.0 Ubuntu 26.04.1 LTS (resolute) | 2.87.2-2 | [gir1.2-glib-2.0 2.87.2-2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gir1.2-glib-2.0-2.87.2-2.md) | Jan 27, 2026 |
| Linux | girepository-tools Ubuntu 25.10 (questing) | 2.86.0-2ubuntu0.3 | [girepository-tools 2.86.0-2ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-girepository-tools-2.86.0-2ubuntu0.3.md) | Jan 27, 2026 |
| Linux | girepository-tools Ubuntu 26.04.1 LTS (resolute) | 2.87.2-2 | [girepository-tools 2.87.2-2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-girepository-tools-2.87.2-2.md) | Jan 27, 2026 |
| Linux | glib2 opensuse-leap 15.6 | 2.78.6-150600.4.35.1 | [SUSE-SU-2026:0373-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0373-1.md) | Feb 4, 2026 |
| Linux | glib2 opensuse-leap 16.0 | 2.84.4-160000.2.1 | [OPENSUSE-SU-2026:20150-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20150-1.md) | Feb 2, 2026 |
| Linux | glib2 sles 15.6 | 2.78.6-150600.4.35.1 | [SUSE-SU-2026:0373-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0373-1.md) | Feb 4, 2026 |
| Linux | glib2 sles 15.7 | 2.78.6-150600.4.35.1 | [SUSE-SU-2026:0373-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0373-1.md) | Feb 4, 2026 |
| Linux | glib2 sles 16.0 | 2.84.4-160000.2.1 | [SUSE-SU-2026:20221-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20221-1.md) | Feb 2, 2026 |
| Linux | glib2-doc opensuse-leap 15.6 | 2.78.6-150600.4.35.1 | [SUSE-SU-2026:0373-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0373-1.md) | Feb 4, 2026 |
| Linux | glib2-doc opensuse-leap 16.0 | 2.84.4-160000.2.1 | [OPENSUSE-SU-2026:20150-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20150-1.md) | Feb 2, 2026 |
| Linux | glib2-doc sles 16.0 | 2.84.4-160000.2.1 | [SUSE-SU-2026:20221-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20221-1.md) | Feb 2, 2026 |
| Linux | glib2.0 Debian 12.15 (bookworm) | 2.74.6-2+deb12u9 | [DEBIAN-CVE-2026-1484](https://patchblox.com/security/data/fix/linux/debian-cve-2026-1484.md) | Jan 27, 2026 |
| Linux | glib2.0 Debian 13.5 (trixie) | 2.84.4-3~deb13u3 | [DEBIAN-CVE-2026-1484](https://patchblox.com/security/data/fix/linux/debian-cve-2026-1484.md) | Jan 27, 2026 |
| Linux | glib2.0 Debian 14 | 2.86.3-5 | [DEBIAN-CVE-2026-1484](https://patchblox.com/security/data/fix/linux/debian-cve-2026-1484.md) | Jan 27, 2026 |
| Linux | libgio-2.0-dev-bin Ubuntu 25.10 (questing) | 2.86.0-2ubuntu0.3 | [libgio-2.0-dev-bin 2.86.0-2ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libgio-2.0-dev-bin-2.86.0-2ubuntu0.3.md) | Jan 27, 2026 |
| Linux | libgio-2.0-dev-bin Ubuntu 26.04.1 LTS (resolute) | 2.87.2-2 | [libgio-2.0-dev-bin 2.87.2-2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libgio-2.0-dev-bin-2.87.2-2.md) | Jan 27, 2026 |
| Linux | libgirepository-2.0-0 Ubuntu 24.04.5 LTS (noble) | 2.80.0-6ubuntu3.8 | [libgirepository-2.0-0 2.80.0-6ubuntu3.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libgirepository-2.0-0-2.80.0-6ubuntu3.8.md) | Jan 27, 2026 |
| Linux | libgirepository-2.0-0 Ubuntu 25.10 (questing) | 2.86.0-2ubuntu0.3 | [libgirepository-2.0-0 2.86.0-2ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libgirepository-2.0-0-2.86.0-2ubuntu0.3.md) | Jan 27, 2026 |
| Linux | libgirepository-2.0-0 Ubuntu 26.04.1 LTS (resolute) | 2.87.2-2 | [libgirepository-2.0-0 2.87.2-2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libgirepository-2.0-0-2.87.2-2.md) | Jan 27, 2026 |
| Linux | libglib2.0-0 Ubuntu 22.04.1 LTS (jammy) | 2.72.4-0ubuntu2.9 | [libglib2.0-0 2.72.4-0ubuntu2.9](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libglib2.0-0-2.72.4-0ubuntu2.9.md) | Jan 27, 2026 |
| Linux | libglib2.0-0t64 Ubuntu 24.04.5 LTS (noble) | 2.80.0-6ubuntu3.8 | [libglib2.0-0t64 2.80.0-6ubuntu3.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libglib2.0-0t64-2.80.0-6ubuntu3.8.md) | Jan 27, 2026 |
| Linux | libglib2.0-0t64 Ubuntu 25.10 (questing) | 2.86.0-2ubuntu0.3 | [libglib2.0-0t64 2.86.0-2ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libglib2.0-0t64-2.86.0-2ubuntu0.3.md) | Jan 27, 2026 |
| Linux | libglib2.0-0t64 Ubuntu 26.04.1 LTS (resolute) | 2.87.2-2 | [libglib2.0-0t64 2.87.2-2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libglib2.0-0t64-2.87.2-2.md) | Jan 27, 2026 |
| Linux | libglib2.0-bin Ubuntu 22.04.1 LTS (jammy) | 2.72.4-0ubuntu2.9 | [libglib2.0-bin 2.72.4-0ubuntu2.9](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libglib2.0-bin-2.72.4-0ubuntu2.9.md) | Jan 27, 2026 |
| Linux | libglib2.0-bin Ubuntu 24.04.5 LTS (noble) | 2.80.0-6ubuntu3.8 | [libglib2.0-bin 2.80.0-6ubuntu3.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libglib2.0-bin-2.80.0-6ubuntu3.8.md) | Jan 27, 2026 |
| Linux | libglib2.0-bin Ubuntu 25.10 (questing) | 2.86.0-2ubuntu0.3 | [libglib2.0-bin 2.86.0-2ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libglib2.0-bin-2.86.0-2ubuntu0.3.md) | Jan 27, 2026 |
| Linux | libglib2.0-bin Ubuntu 26.04.1 LTS (resolute) | 2.87.2-2 | [libglib2.0-bin 2.87.2-2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libglib2.0-bin-2.87.2-2.md) | Jan 27, 2026 |
| Linux | libglib2.0-data Ubuntu 22.04.1 LTS (jammy) | 2.72.4-0ubuntu2.9 | [libglib2.0-data 2.72.4-0ubuntu2.9](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libglib2.0-data-2.72.4-0ubuntu2.9.md) | Jan 27, 2026 |
| Linux | libglib2.0-data Ubuntu 24.04.5 LTS (noble) | 2.80.0-6ubuntu3.8 | [libglib2.0-data 2.80.0-6ubuntu3.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libglib2.0-data-2.80.0-6ubuntu3.8.md) | Jan 27, 2026 |
| Linux | libglib2.0-data Ubuntu 25.10 (questing) | 2.86.0-2ubuntu0.3 | [libglib2.0-data 2.86.0-2ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libglib2.0-data-2.86.0-2ubuntu0.3.md) | Jan 27, 2026 |
| Linux | libglib2.0-data Ubuntu 26.04.1 LTS (resolute) | 2.87.2-2 | [libglib2.0-data 2.87.2-2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libglib2.0-data-2.87.2-2.md) | Jan 27, 2026 |
| Linux | libglib2.0-dev-bin Ubuntu 22.04.1 LTS (jammy) | 2.72.4-0ubuntu2.9 | [libglib2.0-dev-bin 2.72.4-0ubuntu2.9](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libglib2.0-dev-bin-2.72.4-0ubuntu2.9.md) | Jan 27, 2026 |
| Linux | libglib2.0-dev-bin Ubuntu 24.04.5 LTS (noble) | 2.80.0-6ubuntu3.8 | [libglib2.0-dev-bin 2.80.0-6ubuntu3.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libglib2.0-dev-bin-2.80.0-6ubuntu3.8.md) | Jan 27, 2026 |
| Linux | libglib2.0-dev-bin Ubuntu 25.10 (questing) | 2.86.0-2ubuntu0.3 | [libglib2.0-dev-bin 2.86.0-2ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libglib2.0-dev-bin-2.86.0-2ubuntu0.3.md) | Jan 27, 2026 |
| Linux | libglib2.0-dev-bin Ubuntu 26.04.1 LTS (resolute) | 2.87.2-2 | [libglib2.0-dev-bin 2.87.2-2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libglib2.0-dev-bin-2.87.2-2.md) | Jan 27, 2026 |
| Linux | libglib2.0-tests Ubuntu 22.04.1 LTS (jammy) | 2.72.4-0ubuntu2.9 | [libglib2.0-tests 2.72.4-0ubuntu2.9](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libglib2.0-tests-2.72.4-0ubuntu2.9.md) | Jan 27, 2026 |
| Linux | libglib2.0-tests Ubuntu 24.04.5 LTS (noble) | 2.80.0-6ubuntu3.8 | [libglib2.0-tests 2.80.0-6ubuntu3.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libglib2.0-tests-2.80.0-6ubuntu3.8.md) | Jan 27, 2026 |
| Linux | libglib2.0-tests Ubuntu 25.10 (questing) | 2.86.0-2ubuntu0.3 | [libglib2.0-tests 2.86.0-2ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libglib2.0-tests-2.86.0-2ubuntu0.3.md) | Jan 27, 2026 |
| Linux | libglib2.0-tests Ubuntu 26.04.1 LTS (resolute) | 2.87.2-2 | [libglib2.0-tests 2.87.2-2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libglib2.0-tests-2.87.2-2.md) | Jan 27, 2026 |

---

Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.