CVE-2026-67855 Use after free in n/a
A remote attacker can cause a denial of service via a heap use-after-free in the GDS PushManagement certificate update workflow.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-67855?
CVE-2026-67855 is a high-severity use after free vulnerability in n/a, published on 4 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
open62541 contains a heap use-after-free in the GDS PushManagement certificate update workflow when UA_ENABLE_GDS_PUSHMANAGEMENT is enabled. This allows a remote attacker to cause a denial of service.
Weakness: CWE-400
Which versions are affected by CVE-2026-67855?
How do I fix CVE-2026-67855?
No fix has been published for CVE-2026-67855 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-67855 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-67855 exists.
Sources
Also known as DEBIAN-CVE-2026-67855, GHSA-cgjp-m25q-4wp8, UBUNTU-CVE-2026-67855.