CVE-2026-86140
Publication date 5 September 2026
Last updated 21 September 2026
Ubuntu priority
Description
In libxml2 before 2.15.4, xmlSnprintfElements in valid.c has a strcat stack-based buffer overflow.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| libxml2 | 26.04 LTS resolute |
Fixed 2.15.2+dfsg-0.1ubuntu0.2
|
| 24.04 LTS noble |
Fixed 2.9.14+dfsg-1.3ubuntu3.9
|
|
| 22.04 LTS jammy |
Fixed 2.9.13+dfsg-1ubuntu0.13
|
|
| 20.04 LTS focal |
Fixed 2.9.10+dfsg-5ubuntu0.20.04.10+esm5
|
|
| 18.04 LTS bionic |
Fixed 2.9.4+dfsg1-6.1ubuntu1.9+esm8
|
|
| 16.04 LTS xenial |
Fixed 2.9.3+dfsg1-1ubuntu0.7+esm13
|
|
| 14.04 LTS trusty |
Fixed 2.9.1+dfsg1-3ubuntu4.13+esm12
|
Get expanded security coverage with Ubuntu Pro
Reduce your average CVE exposure time from 98 days to 1 day with expanded CVE patching, ten-years security maintenance and optional support for the full stack of open-source applications. Free for personal use.
Get Ubuntu Pro 30-day free trialSeverity score breakdown
CVSS version: CVSS v3.0
Base score
8.0 · High
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
References
Related Ubuntu Security Notices (USN)
- USN-8787-1
- libxml2 vulnerabilities
- 21 September 2026