CVE-2025-65503 Use after free in n/a
Local attackers can cause denial of service in Redboltz async_mqtt by triggering SSL initialization failures that lead to use-after-free errors.
- 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-2025-65503?
CVE-2025-65503 is a high-severity use after free vulnerability in n/a, published on 24 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Use after free in endpoint destructors in Redboltz async_mqtt 10.2.5 allows local users to cause a denial of service via triggering SSL initialization failure that results in incorrect destruction order between io_context and endpoint objects.
Weakness: CWE-416
Which versions are affected by CVE-2025-65503?
It affects 1 product.
Products include Redboltz Async Mqtt.
How do I fix CVE-2025-65503?
No fix has been published for CVE-2025-65503 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-2025-65503 being exploited?
There is no known exploitation of CVE-2025-65503 in the wild and no public exploit code.
Sources
Also known as GHSA-957v-8427-4g8j.