CVE-2026-86138
Public on 2026-09-05
Modified on 2026-09-08
Description
In libxml2 before 2.15.4, xmlDictAddQString in dict.c has an integer overflow and resultant heap-based buffer overflow.
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 2 - Core | libxml2 | 2026-09-28 | ALAS2-2026-3940 | Fixed |
| Amazon Linux 2023 | libxml2 | 2026-09-29 | ALAS2023-2026-3122 | Fixed |
| Amazon Linux 2027 Preview | libxml2 | Pending Fix |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 5.3 | CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H |
| NVD | CVSSv3 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |