Bug 2554765 (CVE-2026-112008)

Summary: CVE-2026-112008 libmng: libmng: Denial of Service via heap-based buffer overflow in mng_read_ordr()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in libmng. A heap-based buffer overflow vulnerability exists in the mng_read_ordr() function due to improper buffer allocation sizing when parsing chunk records in Multiple-image Network Graphics (MNG) files. An attacker could exploit this vulnerability by enticing a user or system to process a specially crafted MNG image. Successful exploitation allows an attacker to corrupt memory, causing an application crash and resulting in a Denial of Service (DoS).
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On: 2555421, 2555422    
Bug Blocks:    

Description OSIDB Bzimport 2026-10-18 11:42:30 UTC 
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.