Description
Poppler 0.42.0 through 26.10.0 contains a stack-based buffer overflow in Decrypt::revision6Hash() that allows attackers controlling the password to overwrite stack memory when opening AESV3/R6 encrypted PDFs. Attackers can supply a password longer than 127 bytes through applications using the libpoppler, libpoppler-glib or C++ API to overflow the K1 and E buffers, crashing the process or corrupting memory.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| freedesktop | poppler | 0.42.0 – ≤ 26.10.0 | — |
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 | poppler | 26.07.0-4 | — |
| Debian 13 | poppler | No fix yet | — |
| Debian 12 | poppler | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | poppler | 26.07.0-2ubuntu1.1 | USN-8950-1 |
| Ubuntu 26.04 LTS | poppler | 26.01.0-2ubuntu0.3 | USN-8950-1 |
| Ubuntu 24.04 LTS | poppler | 24.02.0-1ubuntu9.11 | USN-8950-1 |
| Ubuntu 22.04 LTS | poppler | 22.02.0-2ubuntu0.15 | USN-8950-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | poppler | No fix yet | — |
| Ubuntu Pro 18.04 LTS | poppler | No fix yet | — |
| Ubuntu Pro 16.04 LTS | poppler | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | poppler +9 | 26.08.0-1.3.hum1 | RHSA-2026:80579, RHSA-2026:80172 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | poppler | 0.79.0-150200.3.56.1 | SUSE-SU-2026:5176-1, SUSE-SU-2026:5133-1 |
| SLES 15 SP7 | poppler-qt5 +1 | 24.03.0-150600.3.34.1 | SUSE-SU-2026:5133-1 |
| SLES 12 SP5 | poppler +1 | 0.43.0-16.77.1 | SUSE-SU-2026:5175-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | poppler | 26.10.0-1.1 | openSUSE-SU-2026:12145-1 |
Advisories 8
- SUSE-SU-2026:5175-1 Security update for poppler, poppler-qt, poppler-qt5 SUSE / openSUSE Security Updates · Nov 11, 2026
- SUSE-SU-2026:5176-1 Security update for poppler, poppler-qt5 SUSE / openSUSE Security Updates · Nov 11, 2026
- WID-SEC-2026-3845 poppler: Schwachstelle ermöglicht Denial of Service und Manipulation von Daten BSI CERT-Bund (WID) · Nov 10, 2026
- SUSE-SU-2026:5133-1 Security update for poppler SUSE / openSUSE Security Updates · Nov 10, 2026
- USN-8950-1 poppler vulnerability Ubuntu Security Notices (USN) · Oct 22, 2026
- openSUSE-SU-2026:12145-1 libpoppler-cpp3-26.10.0-1.1 on GA media SUSE / openSUSE Security Updates · Oct 16, 2026
- RHSA-2026:80579 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2026:80172 Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update Red Hat Security Advisories (RHSA) · Oct 14, 2026
References
- https://gitlab.freedesktop.org/poppler/poppler/-/work_items/1814 issue-tracking
- https://gitlab.freedesktop.org/poppler/poppler/-/merge_requests/2398 patch
- https://gitlab.freedesktop.org/poppler/poppler/-/blob/poppler-26.10.0/poppler/Decrypt.cc#L1767 technical-description
- https://gitlab.freedesktop.org/poppler/poppler product
- VulnCheck Advisory: Poppler 0.42.0 through 26.10.0 Stack Buffer Overflow via Decrypt::revision6Hash() third-party-advisory