Code execution via undersized event buffers
Published Aug 25, 2025 · Updated Nov 3, 2025
Heap-based buffer overflow in The BioSig Project libbiosig 3.9.0 allows remote attackers to execute code via a crafted ISHNE annotation file. In sopen_extended, attacker-controlled file and header lengths can reduce EVENT.N to zero, causing undersized EVENT.POS and EVENT.TYP allocations before annotation entries are written without a matching bounds check. Exploitation requires a consuming application to parse the malicious file, and successful heap corruption permits code execution in that application's process.
Summary
What happened
Heap-based buffer overflow in The BioSig Project libbiosig 3.9.0 allows remote attackers to execute code via a crafted ISHNE annotation file. In sopen_extended, attacker-controlled file and header lengths can reduce EVENT.N to zero, causing undersized EVENT.POS and EVENT.TYP allocations before annotation entries are written without a matching bounds check. Exploitation requires a consuming application to parse the malicious file, and successful heap corruption permits code execution in that application's process.
The record
- CVE
- CVE-2025-53853
- Published
- Aug 25, 2025
- Updated
- Nov 3, 2025
- Vendor
- The BioSig Project
- Product
- libbiosig
- Classifications
- CWE-122, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 25, 2025CVE publishedPublication date reported by the CVE source.
- Nov 3, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=3.9.0
- Affected versionversion=Master Branch (35a819fa)
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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