Bug 2539481 (CVE-2026-96674)

Summary: CVE-2026-96674 alsa-lib: alsa-lib: Integer Overflow via Crafted Topology Files
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 alsa-lib. This vulnerability involves an integer overflow in the src/topology/ctl.c component, where combined topology element sizes are computed using 32-bit arithmetic. This allows an attacker to supply specially crafted topology files that can cause size calculations to wrap around, bypassing bounds checks. Successful exploitation could lead to reading beyond the intended buffer, potentially resulting in sensitive data leakage or application crashes, 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: 2539613    
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Description OSIDB Bzimport 2026-09-23 15:41:38 UTC 
alsa-lib through 1.2.16.1 computes combined topology element size using 32-bit arithmetic in src/topology/ctl.c, allowing integer overflow that defeats bounds checks. Attackers can supply crafted topology files that wrap size calculations, causing the decoder to read beyond the topology buffer and potentially leak sensitive data or crash the application.