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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| rapidlasso | LASzip | ≤ 3.5.0 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | laszip | No fix yet | — |
| Debian 13 | laszip | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | laszip | No fix yet | — |
| Ubuntu 26.04 LTS | laszip | No fix yet | — |
| Ubuntu 24.04 LTS | laszip | No fix yet | — |
| Ubuntu 22.04 LTS | laszip | No fix yet | — |
| Ubuntu 20.04 LTS | laszip | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | laszip | 3.5.0-2.1 | openSUSE-SU-2026:12485-1 |
Advisories 1
- openSUSE-SU-2026:12485-1 laszip-devel-3.5.0-2.1 on GA media SUSE / openSUSE Security Updates · Nov 9, 2026
References
- https://github.com/LASzip/LASzip/commit/c9bfd3e68d65c84d513a2286ae06cbbe17afda02 patch
- https://github.com/LASzip/LASzip/blob/3.5.0/src/laszip_dll.cpp#L3967-L3995 technical-description
- https://github.com/LASzip/LASzip/blob/3.5.0/src/laszip_dll.cpp#L497-L511 technical-description
- https://hackmd.io/@haind-pwn/laszip-vlr-uninitialized-free third-party-advisory
- VulnCheck Advisory: LASzip through 3.5.0 Invalid Free via Truncated VLR Header in laszip_read_header third-party-advisory