CVE-2026-110603 LASzip through 3.5.0 Invalid Free via Truncated VLR Header in laszip_read_header
Attackers can cause heap corruption and crashes by providing crafted LAS/LAZ files with truncated VLR headers to applications using LASzip.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-110603?
CVE-2026-110603 is a medium-severity memory corruption vulnerability in rapidlasso LASzip, published on 14 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
LASzip through 3.5.0 contains an invalid free vulnerability in laszip_read_header() that allows attackers to free uninitialized heap pointers via truncated variable length record data. Attackers can supply a crafted LAS/LAZ file with an inflated VLR count that, when opened and destroyed through the C API, crashes the process and corrupts the heap.
Weakness: CWE-824
Which versions are affected by CVE-2026-110603?
How do I fix CVE-2026-110603?
No fix has been published for CVE-2026-110603 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-2026-110603 being exploited?
There is no known exploitation of CVE-2026-110603 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-110603, GHSA-m6xh-mjq9-hv5w, UBUNTU-CVE-2026-110603.