Description
An issue was discovered in QPDF before 7.0.0. There is a large heap-based out-of-bounds read in the Pl_Buffer::write function in Pl_Buffer.cc. It is caused by an integer overflow in the PNG filter.
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 | qpdf | 7.0.0-1 | — |
| Debian 13 | qpdf | 7.0.0-1 | — |
| Debian 12 | qpdf | 7.0.0-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | qpdf | 8.0.2-3~16.04.1 | USN-3638-1 |
| Ubuntu 14.04 LTS | qpdf | 8.0.2-3~14.04.1 | USN-3638-1 |
Advisories 1
- USN-3638-1 qpdf vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026