libmng through 2.0.3 contains a heap-based buffer overflow vulnerability in mng_read_ordr() that allows attackers to corrupt heap memory because ORDR entry buffers are sized by 5-byte on-wire records instead of 8-byte in-memory entries. Attackers can supply a crafted MNG file with MHDR, DHDR and a multi-record ORDR chunk to applications calling mng_read or mng_readdisplay, writing attacker-controlled data past the allocation and crashing the application.

Attack Vector Local

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
libmng libmng unaffected
Version Status Constraints
0 affected ≤ 2.0.3

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Project Subscriptions

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://hackmd.io/@haindpwn/libmng-ordr-chunk-store-oob-write cve-icon cve-icon
https://sourceforge.net/projects/libmng/ cve-icon cve-icon
https://sourceforge.net/projects/libmng/files/libmng-devel/2.0.3/ cve-icon cve-icon
https://www.vulncheck.com/advisories/libmng-through-2.0.3-heap-buffer-overflow-via-ordr-chunk-reader-mng-read-ordr cve-icon cve-icon
History

Sun, 18 Oct 2026 11:45:00 +0000

Type Values Removed Values Added
Description libmng through 2.0.3 contains a heap-based buffer overflow vulnerability in mng_read_ordr() that allows attackers to corrupt heap memory because ORDR entry buffers are sized by 5-byte on-wire records instead of 8-byte in-memory entries. Attackers can supply a crafted MNG file with MHDR, DHDR and a multi-record ORDR chunk to applications calling mng_read or mng_readdisplay, writing attacker-controlled data past the allocation and crashing the application.
Title libmng through 2.0.3 Heap Buffer Overflow via ORDR Chunk Reader mng_read_ordr
Weaknesses CWE-131
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-18T11:38:31.288Z

Reserved: 2026-10-18T01:23:45.646Z

Link: CVE-2026-112008

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-18T12:17:13.247

Modified: 2026-10-18T12:17:13.247

Link: CVE-2026-112008

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-18T12:45:01Z

Weaknesses