CVE-2026-93312

Freedesktop Poppler JBIG2Stream.cc rewind null pointer dereference

State: Published
Severity: 5.3 Medium
Published: Sep 18, 2026
Updated: Sep 22, 2026
Reserved: Sep 17, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P	VulDB
3.1	4.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C	VulDB
3.0	4.3 Medium	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C	VulDB
2.0	5.0 Medium	AV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:OF/RC:C	VulDB

Weaknesses

CWE-476 NULL Pointer Dereference
CWE-404 Denial of Service

Affected Products

Product	Versions
PopplerFreedesktop	26.07.0Affected 26.08.0Not affected

References

VDB-406610 | Freedesktop Poppler JBIG2Stream.cc rewind null pointer dereferencevdb-entrytechnical-description
VDB-406610 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
CVE-2026-93312 | CVE Analysis and Reportthird-party-advisory
Submit #942345 | freedesktop.org Poppler 26.07.0 NULL Pointer Dereferencethird-party-advisory
https://gitlab.freedesktop.org/poppler/poppler/-/work_items/1759related
https://gitlab.freedesktop.org/poppler/poppler/-/merge_requests/2314patch
https://github.com/r1ck9-2q/cve_summit/blob/main/Null-pointer-offset-undefined-behavior-in-JBIG2Stream-rewind-JBIG2Stream.cc-1229.mdexploit
https://gitlab.freedesktop.org/poppler/poppler/-/commit/5e49250f13b0390edeb3f90eb4c02c9941f97067broken-linkpatch

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