CVE-2026-74238 TIER IV Nebula 1.2.0 Heap Out-of-Bounds Read via VLP32 UDP Decoder
Unauthenticated remote attackers can trigger heap out-of-bounds reads in the VLP32 UDP decoder, leaking memory or causing crashes in autonomous driving systems.
- 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-2026-74238?
CVE-2026-74238 is a high-severity memory corruption vulnerability in tier4 nebula, published on 17 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
TIER IV Nebula through 1.2.0 contains an out-of-bounds read vulnerability in the Vlp32Decoder::unpack() function that allows unauthenticated remote attackers to cause the decoder to read past the end of a received UDP buffer into adjacent heap memory by sending a short UDP datagram. Attackers can send a malformed datagram to the Velodyne UDP sensor port, which lacks sender-address restrictions present in other drivers, causing fabricated points derived from heap memory contents to be silently published into downstream PointCloud2 messages consumed by Autoware nodes.
Weakness: CWE-125
Which versions are affected by CVE-2026-74238?
How do I fix CVE-2026-74238?
No fix has been published for CVE-2026-74238 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-74238 being exploited?
There is no known exploitation of CVE-2026-74238 in the wild and no public exploit code.
Sources
Also known as GHSA-77m7-4hpw-56g7.