Description
KDE kmail before 5.5.2 and messagelib before 5.5.2, as distributed in KDE Applications before 17.04.2, do not ensure that a plugin's sign/encrypt action occurs during use of the Send Later feature, which allows remote attackers to obtain sensitive information by sniffing the network.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 12 | kf5-messagelib | 4:16.04.3-3 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | kdepim | 4:15.12.3-0ubuntu1.1 | — |
| Ubuntu 14.04 LTS | kdepim | 4:4.13.3-0ubuntu0.2 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 12 SP2 | kdepim | 16.08.2-5.2 | openSUSE-SU-2017:1756-1, openSUSE-SU-2017:1748-1 |
| SUSE Package Hub 12 SP2 | messagelib | 16.08.2-5.1 | openSUSE-SU-2017:1756-1, openSUSE-SU-2017:1748-1 |
Advisories 2
- openSUSE-SU-2017:1748-1 Security update for kdepim, messagelib SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2017:1756-1 Security update for kdepim, messagelib SUSE / openSUSE Security Updates · Feb 4, 2026