CVE-2026-43988 Vanetza: Remote Denial of Service via Uncaught Exception in ASN.1/OER Parsing
Remote attackers can crash the Vanetza application by sending malformed ASN.1/OER packets that trigger an uncaught exception.
- 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-2026-43988?
CVE-2026-43988 is a high-severity denial of service vulnerability in riebl vanetza, published on 26 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Vanetza is an open-source implementation of the ETSI C-ITS protocol suite. In 26.02 and earlier, a denial-of-service vulnerability was identified in the ASN.1/OER parsing pipeline of Vanetza. When processing malformed network packets containing corrupted ASN.1/OER structures (e.g., invalid length fields or malformed certificate encoding), the ASN.1 wrapper (asn1c_wrapper.cpp) raises a std::runtime_error. This exception is not caught at the parsing boundary and propagates to std::terminate, resulting in process termination. This vulnerability is fixed with commit 62dfe58a8342512b6e1947d75821402ada524f1a.
Weakness: CWE-248
Which versions are affected by CVE-2026-43988?
How do I fix CVE-2026-43988?
No fix has been published for CVE-2026-43988 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-43988 being exploited?
There is no known exploitation of CVE-2026-43988 in the wild and no public exploit code.
Sources
Also known as GHSA-j6cj-rp87-mfrx.