Description
libqpdf.a in QPDF through 8.0.2 mishandles certain "expected dictionary key but found non-name object" cases, allowing remote attackers to cause a denial of service (stack exhaustion), related to the QPDFObjectHandle and QPDF_Dictionary classes, because nesting in direct objects is not restricted.
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 | 8.0.2-3 | — |
| Debian 13 | qpdf | 8.0.2-3 | — |
| Debian 12 | qpdf | 8.0.2-3 | — |
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 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | qpdf | 7.1.1-3.11.1 | SUSE-SU-2024:2173-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP5 | qpdf | 7.1.1-3.11.1 | SUSE-SU-2024:2173-1 |
Advisories 2
- USN-3638-1 qpdf vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- SUSE-SU-2024:2173-1 Security update for qpdf SUSE / openSUSE Security Updates · Feb 4, 2026