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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| 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) | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | glib2.0 | 2.86.3-5 | — |
| Debian 13 | glib2.0 | 2.84.4-3~deb13u3 | — |
| Debian 12 | glib2.0 | 2.74.6-2+deb12u9 | — |
| Debian 11 | glib2.0 | 2.66.8-1+deb11u8 | DLA-4491-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | glib2.0 | 2.87.2-2 | — |
| Ubuntu 25.10 | glib2.0 | 2.86.0-2ubuntu0.3 | USN-8017-1 |
| Ubuntu 24.04 LTS | glib2.0 | 2.80.0-6ubuntu3.8 | USN-8017-1 |
| Ubuntu 22.04 LTS | glib2.0 | 2.72.4-0ubuntu2.9 | USN-8017-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | glib2.0 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | glib2.0 | No fix yet | — |
| Ubuntu Pro 16.04 LTS | glib2.0 | No fix yet | — |
| Ubuntu Pro 14.04 LTS | glib2.0 | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | glib2 | 2.78.6-150600.4.35.1 | SUSE-SU-2026:0373-1 |
| SLES 15 SP6 | glib2 | 2.78.6-150600.4.35.1 | SUSE-SU-2026:0373-1 |
| SLES 12 SP5 | glib2 | 2.48.2-12.58.1 | SUSE-SU-2026:0372-1 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | glib2 +1 | 2.84.4-160000.2.1 | SUSE-SU-2026:20221-1 |
| SLES for SAP 15 SP6 | glib2 | 2.78.6-150600.4.35.1 | SUSE-SU-2026:0373-1 |
| SLES 16.0 | glib2 +1 | 2.84.4-160000.2.1 | SUSE-SU-2026:20221-1 |
| SLE Micro 6.2 | glib2 | 2.84.4-160000.2.1 | SUSE-SU-2026:20210-1 |
| SLE Micro 6.1 | glib2 | 2.78.6-slfo.1.1_6.1 | SUSE-SU-2026:20493-1 |
| SLE Micro 6.0 | glib2 | 2.76.2-12.1 | SUSE-SU-2026:20446-1 |
| SLE Micro 5.2 | glib2 | 2.62.6-150200.3.42.1 | SUSE-SU-2026:0355-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | glib2 | 2.86.3-3.1 | openSUSE-SU-2026:10111-1 |
| openSUSE Leap 16.0 | glib2 +1 | 2.84.4-160000.2.1 | openSUSE-SU-2026:20150-1 |
| openSUSE Leap 15.6 | glib2 +1 | 2.78.6-150600.4.35.1 | SUSE-SU-2026:0373-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | glib | 2.78.6-7 | — |
| Azure Linux 2 (CBL-Mariner) | glib | No fix yet | — |
Advisories 14
- ICSA-26-188-05 Siemens SINEC OS CISA ICS & IT advisories · Jul 7, 2026
- SSA-253495 SSA-253495: Multiple Vulnerabilities in SINEC OS before V4.0 Siemens ProductCERT · Jun 2, 2026
- WID-SEC-2026-0778 Dell Secure Connect Gateway Policy Manager: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 11, 2026
- USN-8017-1 glib2.0 vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- openSUSE-SU-2026:20150-1 Security update for glib2 SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2026:10111-1 gio-branding-upstream-2.86.3-3.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20493-1 Security update for glib2 SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20446-1 Security update for glib2 SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20221-1 Security update for glib2 SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20210-1 Security update for glib2 SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0372-1 Security update for glib2 SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0373-1 Security update for glib2 SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0355-1 Security update for glib2 SUSE / openSUSE Security Updates · Mar 23, 2026
- DLA-4491-1 glib2.0 - security update Debian Security (DSA / DLA) · Feb 23, 2026