CVE-2026-102633
Public on 2026-09-29
Modified on 2026-10-01
Description
libexpat versions 2.7.2 through 2.8.5 contain an integer overflow vulnerability in expat_realloc() function on 32-bit platforms when computing allocation sizes. Attackers supplying malicious XML to applications parsing with vulnerable libexpat can cause heap buffer overflow, memory corruption, or denial of service.
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 2 - Core | expat | Not Affected | ||
| Amazon Linux 2023 | expat | Pending Fix | ||
| Amazon Linux 2027 Preview | expat | Pending Fix | ||
| Amazon Linux 2 - Firefox Extra | firefox | Pending Fix | ||
| Amazon Linux 2023 | firefox | Pending Fix | ||
| Amazon Linux 2027 Preview | firefox | Pending Fix | ||
| Amazon Linux 2 - Firefox Extra | firefox-amzn-policies-generic | Not Affected | ||
| Amazon Linux 2 - Core | thunderbird | Pending Fix | ||
| Amazon Linux 2 - Core | xmlrpc-c | Not Affected | ||
| Amazon Linux 2023 | xmlrpc-c | Not Affected | ||
| Amazon Linux 2027 Preview | xmlrpc-c | Not Affected |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |