TI-2026-62923 Aliases CVE-2026-93312 GHSA-mm25-wh7f-mmv7

Freedesktop Poppler JBIG2Stream.cc rewind null pointer dereference

MEDIUM 57CWE-404Published 2026-09-18 · Updated 2026-09-22

Key facts

Attack vector: Network
Privileges required: None
User interaction: Passive
Attack complexity: Low
Attack requirements: None
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · Low
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-404.

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00404 34th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA

Fix Fixed Poppler (Freedesktop): 26.08.0Red Hat: 1 advisory

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Freedesktop	Poppler	26.07.0	26.08.0	Patch available	CNA

Poppler VendorFreedesktop Affected 26.07.0 Fixed in 26.08.0 Patch available CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:freedesktop:poppler::::::::	—	—	Freedesktop

cpe:2.3:a:freedesktop:poppler:*:*:*:*:*:*:*:* Versions — — ·Freedesktop

Remediation

Fix · CNA Poppler (Freedesktop) Fixed in 26.08.0

Red Hat 1 advisory

RHSA-2026:58482 Released 2026-08-22 · Red Hat rating Moderate
Red Hat Hardened Images RPMs bug fix and enhancement update
- Red Hat Hardened Images poppler-26.08.0-1.hum1@aarch64, poppler-26.08.0-1.hum1@src, poppler-26.08.0-1.hum1@x86_64 +18

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Hardened Images	Fixed	RHSA-2026:58482

Not affected: 5 products

Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9

Timeline

2026-10-02 Threatist record created from CVE-2026-93312
2026-10-03 Alias added: GHSA-mm25-wh7f-mmv7

References

Exploit 1

https://github.com/r1ck9-2q/cve_summit/blob/main/Null-pointer-offset-undefined-behavior-in-JBIG2Stream-rewind-JBIG2Stream.cc-1229.md

Patch 2

Other 1

https://gitlab.freedesktop.org/poppler/poppler/-/work_items/1759

TI-2021-11232 Integer overflow in Apple macOS KEVCVSS 3.1HIGH 7.8
TI-2026-37034 In libinput before 1.30.4 and 1.31.x before 1.31.3, libinput-device-group unescaped phys… CVSS 3.1CRITICAL 9.8
TI-2022-03721 When xdg-mail is configured to use thunderbird for mailto URLs, improper parsing of the… CVSS 3.1HIGH 7.4
TI-2026-62922 Freedesktop Poppler SampledFunction Function.cc integer overflow CVSS 4.0MEDIUM 5.3
TI-2025-32126 An issue in the pdfseparate utility of freedesktop poppler v25.04.0 allows attackers to… CVSS 3.1MEDIUM 6.5
TI-2022-20347 An issue was discovered in D-Bus before 1.12.24, 1.13.x and 1.14.x before 1.14.4, and… CVSS 3.1MEDIUM 6.5

See all 158 →

Sources

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