Secuno
ENNL
Book demo

CVE-2026-25556

Artifex Mupdf double free

7.5 HIGHPublic exploitEPSS 0.77%
  1. Published6 Feb 2026

Description

MuPDF versions 1.23.0 through 1.27.0 contain a double-free vulnerability in fz_fill_pixmap_from_display_list() when an exception occurs during display list rendering. The function accepts a caller-owned fz_pixmap pointer but incorrectly drops the pixmap in its error handling path before rethrowing the exception. Callers (including the barcode decoding path in fz_decode_barcode_from_display_list) also drop the same pixmap in cleanup, resulting in a double-free that can corrupt the heap and crash the process. This issue affects applications that enable and use MuPDF barcode decoding and can be triggered by processing crafted input that causes a rendering-time error while decoding barcodes.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Artifex Mupdf≥ 1.23.0 ≤ 1.27.0

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-57599.8
A double free and use-after-free vulnerability in the RdbLoadDeletedNodes function of…
CVE-2026-890789.9
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 19.2 before…
CVE-2026-910188.8
lwIP (Lightweight IP) has a double free vulnerability, which could crash the system,…
CVE-2026-201358.6
A vulnerability in the TLS 1.3 implementation in Cisco Secure Firewall Threat Defense…
CVE-2026-845619.8
A double free issue was addressed with improved memory management. This issue is fixed…
CVE-2026-859218.2
Double free in Windows Secure Kernel Mode allows an authorized attacker to elevate…

Frequently asked

Is CVE-2026-25556 being actively exploited?

CVE-2026-25556 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.77%.

How severe is CVE-2026-25556?

CVE-2026-25556 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.77% probability of exploitation.

Which products are affected by CVE-2026-25556?

Affected products include Artifex Mupdf.

How do I fix CVE-2026-25556?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-25556 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Get Patch this first every Monday

Five vulnerabilities that matter this week, ranked on real exploitation. Plain language, one email, no spam.

You can unsubscribe with one click from every issue. We handle your details as described in our privacy policy.

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.