CLSA-2026-1778690104 exim: Fix of CVE-2026-40685

CVE-2026-40685: fix OOB heap write in dewrap when expanding header ending with stray backslash...

CVE-2026-40685

creationtimestamp| type| source ---|---|--- 2026-04-30 13:50:08+00:00| seen| https://bsky.app/profile/o2cloud.bsky.social/post/3mkpqz242uz27 2026-05-02 04:40:22+00:00| seen| https://vulnerability.circl.lu/bundle/1f150b5f-d6d1-40b6-94cc-7bd855a097ec 2026-05-25 20:02:12+00:00| seen|...

Linux Distros Unpatched Vulnerability : CVE-2026-40685

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - In Exim before 4.99.2, when JSON lookup is enabled, an out-of-bounds heap write can occur when a JSON operator encounters malformed JSON in an untrusted header,...

UBUNTU-CVE-2026-40685

In Exim before 4.99.2, when JSON lookup is enabled, an out-of-bounds heap write can occur when a JSON operator encounters malformed JSON in an untrusted header, because of an incorrect implementation of \ skipping...