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CVE-2026-93312

Freedesktop Poppler JBIG2Stream.cc rewind null pointer dereference

MEDIUM
4.3
CVSS Score
Published: September 18, 2026 at 12:45 AM UTC
Updated: September 22, 2026 at 07:16 PM UTC
1 product affected across 1 vendorPoppler

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.4%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Poppler· Freedesktop
60%
26.07.0
Vendor states this is fixed in 26.08.0 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (8)

VDB EntryTechnical Description
Source: cverecord
https://vuldb.com/vuln/406610
SignaturePermissions Required
Source: cverecord
https://vuldb.com/vuln/406610/cti
Third Party Advisory
Source: cverecord
https://vuldb.com/cve/CVE-2026-93312
Third Party Advisory
Source: cverecord
https://vuldb.com/submit/942345
Related
Source: cverecord
https://gitlab.freedesktop.org/poppler/poppler/-/work_items/1759
Patch
Source: cverecord
https://gitlab.freedesktop.org/poppler/poppler/-/merge_requests/2314
Exploit
Source: cverecord
https://github.com/r1ck9-2q/cve_summit/blob/main/Null-pointer-offset-undefined-behavior-in-JBIG2Stream-rewind-JBIG2Stream.cc-1229.md
Broken LinkPatch
Source: cverecord
https://gitlab.freedesktop.org/poppler/poppler/-/commit/5e49250f13b0390edeb3f90eb4c02c9941f97067

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.3MEDIUMVulDB
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-476CWE-404

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