Description
OpenConnect VPN client with GnuTLS before 5.02 contains a heap overflow if MTU is increased on reconnection.
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 14 | openconnect | 5.02-1 | — |
| Debian 13 | openconnect | 5.02-1 | — |
| Debian 12 | openconnect | 5.02-1 | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | openconnect | 7.07-1.3 | openSUSE-SU-2024:10553-1 |
Advisories 1
- openSUSE-SU-2024:10553-1 openconnect-7.07-1.3 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026