Vulnerability · Published Jan 27, 2026 · Assigned by redhat
CVE-2026-1489Glib: glib: memory corruption via integer overflow in unicode case conversion
Medium 5.4
In plain English
A medium-severity out-of-bounds write in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
A flaw was found in GLib. An integer overflow vulnerability in its Unicode case conversion implementation can lead to memory corruption. By processing specially crafted and extremely large Unicode strings, an attacker could trigger an undersized memory allocation, resulting in out-of-bounds writes. This could cause applications utilizing GLib for string conversion to crash or become unstable.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | glib2.0 | 2.74.6-2+deb12u9 | DEBIAN-CVE-2026-1489 |
| Debian:13 | glib2.0 | 2.84.4-3~deb13u3 | DEBIAN-CVE-2026-1489 |
| Debian:14 | glib2.0 | 2.86.3-5 | DEBIAN-CVE-2026-1489 |
| Ubuntu:22.04:LTS | glib2.0 | 2.72.4-0ubuntu2.9 | USN-8017-1 |
| Ubuntu:22.04:LTS | glib2.0 | 2.72.4-0ubuntu2.9 | UBUNTU-CVE-2026-1489 |
| Ubuntu:24.04:LTS | glib2.0 | 2.80.0-6ubuntu3.8 | USN-8017-1 |
| Ubuntu:24.04:LTS | glib2.0 | 2.80.0-6ubuntu3.8 | UBUNTU-CVE-2026-1489 |
| Ubuntu:25.10 | glib2.0 | 2.86.0-2ubuntu0.3 | UBUNTU-CVE-2026-1489 |
| Ubuntu:25.10 | glib2.0 | 2.86.0-2ubuntu0.3 | USN-8017-1 |
| Ubuntu:26.04:LTS | glib2.0 | 2.87.2-2 | UBUNTU-CVE-2026-1489 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 6 | see references |
| Red Hat | Red Hat Enterprise Linux 7 | see references |
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
Weakness: CWE-787 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L
References
- https://access.redhat.com/security/cve/CVE-2026-1489 vdb-entry, x_refsource_REDHAT
- RHBZ#2433348 issue-tracking, x_refsource_REDHAT
- https://gitlab.gnome.org/GNOME/glib/-/issues/3872
- https://cert-portal.siemens.com/productcert/html/ssa-253495.html