CVE-2026-56406
Published: June 23, 2026Last modified: July 1, 2026
Description
libexpat before 2.8.2 has an integer overflow in XML_ParseBuffer because it lacked a check that was present in XML_Parse.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 6.9 |
| Attack Vector | LOCAL |
| Attack complexity | HIGH |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity impact | HIGH |
| Availability impact | LOW |
| Vector | CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | expat | Fixed (2.8.2-r0) |
| 25 LTS | expat | Fixed (2.8.2-r0) | |
| Stream | expat | Fixed (2.8.2-r0) | |
| Hardened Containers | 23 LTS | expat | Fixed (2.8.2-r0) |
| 25 LTS | expat | Fixed (2.8.2-r0) | |
| Stream | expat | Fixed (2.8.2-r0) |