Thank you for signing up for our newsletter!
In these regular emails you will find the latest updates about
Ubuntu and upcoming events where you can meet our team.Close
Michał Majchrowicz and Marcin Wyczechowski discovered that libevent
incorrectly handled certain DNS responses. A remote attacker could possibly
use this issue to cause a denial of service or execute arbitrary code.
(CVE-2026-63387)
It was discovered that libevent incorrectly handled certain connections. A
local attacker could possibly use this issue to cause a denial of service
or execute arbitrary code. This issue only affected Ubuntu 18.04 LTS,
Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS.
(CVE-2026-63388)
Michał Majchrowicz and Marcin Wyczechowski discovered that libevent
incorrectly handled certain DNS responses. A remote attacker could possibly
use this issue to cause a denial of service or execute arbitrary code.
(CVE-2026-63387)
It was discovered that libevent incorrectly handled certain connections. A
local attacker could possibly use this issue to cause a denial of service
or execute arbitrary code. This issue only affected Ubuntu 18.04 LTS,
Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS.
(CVE-2026-63388)
Update instructions
In general, a standard system update will make all the necessary changes.
