Bug 2540836 (CVE-2026-88386)

Summary: CVE-2026-88386 libsndfile: libsndfile: Denial of Service via misaligned memory access during WAV parsing
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: bbrownin, rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in libsndfile. This issue occurs due to a misaligned memory access when parsing WAV format chunks in the psf_binheader_readf() function. By convincing an application or user to process a specially crafted WAV audio file, an attacker can trigger an unexpected crash, leading to 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: 2542969, 2542970    
Bug Blocks:    

Description OSIDB Bzimport 2026-09-24 20:52:26 UTC
libsndfile 1.2.2 contains a misaligned memory access issue in psf_binheader_readf() while parsing WAV fmt chunks. A specially crafted WAV file can cause the function to cast an unaligned destination address to unsigned int * and perform a 4-byte store. This results in undefined behavior leading to denial of service.