CVE-2025-67896
Publication date 15 December 2025
Last updated 15 December 2025
Ubuntu priority
Description
Exim before 4.99.1 allows remote heap corruption that will be further described on 2025-12-18.
Read the notes from the security team
Why is this CVE high priority?
This is a remote code execution vulnerability
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| exim4 | 25.10 questing |
Needs evaluation
|
| 25.04 plucky |
Not affected
|
|
| 24.04 LTS noble |
Not affected
|
|
| 22.04 LTS jammy |
Not affected
|
|
| 20.04 LTS focal |
Not affected
|
|
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial |
Not affected
|
|
| 14.04 LTS trusty |
Not affected
|
Notes
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
6.4 · Medium
|
| Attack vector | Network |
| Attack complexity | High |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity impact | High |
| Availability impact | Low |
| Vector | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:L |