Poppler is a PDF rendering library. Versions prior to 25.06.0 use `std::atomic_int` for reference counting. Because `std::atomic_int` is only 32 bits, it is possible to overflow the reference count and trigger a use-after-free. Version 25.06.0 patches the issue.
https://securitylab.github.com/advisories/GHSL-2025-054_poppler/
https://gitlab.freedesktop.org/poppler/poppler/-/merge_requests/1828
https://gitlab.freedesktop.org/poppler/poppler/-/issues/1581
https://gitlab.freedesktop.org/poppler/poppler/-/commit/ac36affcc8486de38e8905a8d6547a3464ff46e5
https://gitlab.freedesktop.org/poppler/poppler/-/commit/04bd91684ed41d67ae0f10cde0660e4ed74ac203
Published: 2025-07-02
Updated: 2025-07-03
Base Score: 7.5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P
Severity: High
Base Score: 9.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity: Critical
Base Score: 6.9
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Severity: Medium
EPSS: 0.00014