Vulnerability-Lookup

GHSA-39P9-G2PQ-Q8R7

Vulnerability from github – Published: 2026-02-06 18:30 – Updated: 2026-02-24 21:31

Details

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.

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

5.9 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-25556"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-415"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-02-06T17:16:27Z",
    "severity": "MODERATE"
  },
  "details": "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.",
  "id": "GHSA-39p9-g2pq-q8r7",
  "modified": "2026-02-24T21:31:30Z",
  "published": "2026-02-06T18:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-25556"
    },
    {
      "type": "WEB",
      "url": "https://bugs.ghostscript.com/show_bug.cgi?id=709029"
    },
    {
      "type": "WEB",
      "url": "https://cgit.ghostscript.com/cgi-bin/cgit.cgi/mupdf.git/commit/?id=d4743b6092d513321c23c6f7fe5cff87cde043c1"
    },
    {
      "type": "WEB",
      "url": "https://mupdf.com"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/mupdf-barcode-decoding-double-free"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-25556 (GCVE-0-2026-25556)

Vulnerability from cvelistv5 – Published: 2026-02-06 16:11 – Updated: 2026-05-25 23:41

Title

MuPDF 1.23.0 through 1.27.0 Barcode Decoding Double Free

Summary

Severity

5.9 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-415 - Double Free

Assigner

VulnCheck

References

4 references

URL	Tags
https://bugs.ghostscript.com/show_bug.cgi?id=709029	issue-tracking
https://cgit.ghostscript.com/cgi-bin/cgit.cgi/mup…	patch
https://mupdf.com/	product
https://www.vulncheck.com/advisories/mupdf-barcod…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
Artifex Software	MuPDF	Affected: 1.23.0 , ≤ 1.27.0 (semver)

Credits

Pavel Kohout, Aisle Research (www.aisle.com)

Show details on NVD website

JSON

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                  },
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                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-02-06T16:34:46.909949Z",
                "version": "2.0.3"
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-39P9-G2PQ-Q8R7

CVE-2026-25556 (GCVE-0-2026-25556)

Tags

Sightings

Nomenclature