CVE-2026-93312 Freedesktop Poppler JBIG2Stream.cc rewind null pointer dereference
Remote attackers can cause a denial of service via null pointer dereference in Poppler's JBIG2Stream, requiring an upgrade to fix.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-93312?
CVE-2026-93312 is a medium-severity vulnerability in Freedesktop Poppler, published on 18 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A flaw has been found in Freedesktop Poppler 26.07.0. Impacted is the function JBIG2Stream::rewind of the file poppler/JBIG2Stream.cc. This manipulation causes null pointer dereference. It is possible to initiate the attack remotely. The exploit has been published and may be used. Upgrading to version 26.08.0 is recommended to address this issue. Patch name: 5e49250f13b0390edeb3f90eb4c02c9941f97067. Upgrading the affected component is advised.
Which versions are affected by CVE-2026-93312?
How do I fix CVE-2026-93312?
Upgrade to a fixed version.
Is CVE-2026-93312 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-93312 exists.
Sources
Also known as DEBIAN-CVE-2026-93312, ECHO-16f1-c40a-5bf3, GHSA-mm25-wh7f-mmv7, UBUNTU-CVE-2026-93312.