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Fencer Vulns
medium 4.3

CVE-2026-93312 json

Freedesktop Poppler JBIG2Stream.cc rewind null pointer dereference

published 2026-09-18 52 d ago modified 2026-09-22 47 d ago also EUVD-2026-82613

cvss
4.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 34%
public exploits
0
none known

Summary

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.

Patch / fix

  • Freedesktop Poppler 26.08.0
  • poppler Debian 14 26.07.0-3

debian advisories DEBIAN-CVE-2026-93312

  • poppler Ubuntu 22.04 LTS 22.02.0-2ubuntu0.14
  • poppler Ubuntu 24.04 LTS 24.02.0-1ubuntu9.10
  • poppler Ubuntu 26.04 LTS 26.01.0-2ubuntu0.2

ubuntu advisories UBUNTU-CVE-2026-93312

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • poppler hummingbird 1 26.08.0-1.hum1
  • poppler-cpp hummingbird 1 26.08.0-1.hum1
  • poppler-qt6 hummingbird 1 26.08.0-1.hum1
  • poppler-glib hummingbird 1 26.08.0-1.hum1
  • poppler-utils hummingbird 1 26.08.0-1.hum1

red hat advisories RHSA-2026:58482

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-93312 updated cvss 4.3

poppler: Freedesktop Poppler: Denial of Service via null pointer dereference in JBIG2Stream::rewind function

  • Red Hat Hardened Images poppler 26.08.0-1.hum1, poppler-cpp 26.08.0-1.hum1, poppler-qt6 26.08.0-1.hum1, poppler-glib 26.08.0-1.hum1, poppler-utils 26.08.0-1.hum1
    fixed: vendor fix RHSA-2026:58482
  • Red Hat Enterprise Linux 6 poppler, poppler-qt, poppler-qt4, poppler-glib, poppler-utils Red Hat Enterprise Linux 7 poppler, poppler-qt, poppler-cpp, poppler-glib, poppler-demos, poppler-utils, +4 more Red Hat Enterprise Linux 8 poppler, poppler-cpp, poppler-qt5, poppler-glib, poppler-utils Red Hat Enterprise Linux 9 poppler, poppler-cpp, poppler-qt5, poppler-glib, poppler-utils Red Hat Enterprise Linux 10 poppler
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
47 d ago

Exploit prediction

0.40% chance of exploitation in the next 30 days, higher than 34% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • vuldb.com https://vuldb.com/submit/942345 referenced PoC, tagged "exploit" by a source, unverified
  • gitlab.freedesktop.org https://gitlab.freedesktop.org/poppler/poppler/-/work_items/1759 referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/r1ck9-2q/cve_summit/blob/main/Null-pointer-offset-undefined-behavior-in-JBIG2Stream-rewind-JBIG2Stream.cc-1229.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 5.3 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
CNA 3.1 4.3 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
CNA 3.0 4.3 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
CNA 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:OF/RC:C
CNA 4.0 2.1 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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CNA 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
CNA 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • Freedesktop Poppler

Classification

Weakness
  • CWE-476 NULL Pointer Dereference
  • CWE-404 Improper Resource Shutdown or Release

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.