CVE-2026-43964
Publication date 5 May 2026
Last updated 9 June 2026
Ubuntu priority
Description
Postfix before 3.8.16, 3.9 before 3.9.10, and 3.10 before 3.10.9 sometimes allows a buffer over-read and process crash via an enhanced status code that lacks text after the third number.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| postfix | 26.04 LTS resolute |
Fixed 3.10.6-4ubuntu2.1
|
| 25.10 questing |
Fixed 3.10.2-1ubuntu2.1
|
|
| 24.04 LTS noble |
Fixed 3.8.6-1ubuntu0.1
|
|
| 22.04 LTS jammy |
Fixed 3.6.4-1ubuntu1.4
|
|
| 20.04 LTS focal |
Fixed 3.4.13-0ubuntu1.4+esm1
|
|
| 18.04 LTS bionic |
Fixed 3.3.0-1ubuntu0.4+esm4
|
|
| 16.04 LTS xenial |
Fixed 3.1.0-3ubuntu0.4+esm4
|
|
| 14.04 LTS trusty |
Fixed 2.11.0-1ubuntu1.2+esm4
|
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| Package | Patch details |
|---|---|
| postfix |
Severity score breakdown
CVSS version: CVSS v3.0
Base score
3.7 · Low
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
References
Related Ubuntu Security Notices (USN)
- USN-8253-1
- Postfix vulnerability
- 7 May 2026
- USN-8253-2
- Postfix vulnerability
- 3 June 2026