CVE-2025-66043 — Stack-based Buffer Overflow in Project Libbiosig

CWE-121 — Stack-based Buffer OverflowCWE-787 — Out-of-bounds Write8 documents7 sources
Severity
9.8CRITICALNVD
EPSS
0.2%
top 58.95%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Libbiosig Project LibbiosigTHE Biosig Project Libbiosig
Timeline
PublishedDec 11
Latest updateDec 17

Description

Several stack-based buffer overflow vulnerabilities exists in the MFER parsing functionality of The Biosig Project libbiosig 3.9.1. A specially crafted MFER file can lead to arbitrary code execution. An attacker can provide a malicious file to trigger these vulnerabilities.When Tag is 3

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages2 packages

🔴Vulnerability Details

3
GHSA
GHSA-xhrc-9r99-5p7f: Several stack-based buffer overflow vulnerabilities exists in the MFER parsing functionality of The Biosig Project libbiosig 3↗2025-12-11
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CVEList
CVE-2025-66043: Several stack-based buffer overflow vulnerabilities exists in the MFER parsing functionality of The Biosig Project libbiosig 3↗2025-12-11
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OSV
CVE-2025-66043: Several stack-based buffer overflow vulnerabilities exists in the MFER parsing functionality of The Biosig Project libbiosig 3↗2025-12-11
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📋Vendor Advisories

1
Debian
CVE-2025-66043: biosig - Several stack-based buffer overflow vulnerabilities exists in the MFER parsing f...↗2025
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🕵️Threat Intelligence

3
Talos
Libbiosig, Grassroot DiCoM, Smallstep step-ca vulnerabilities↗2025-12-17
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Talos
Libbiosig, Grassroot DiCoM, Smallstep step-ca vulnerabilities↗2025-12-17
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Wiz
CVE-2025-66043 Impact, Exploitability, and Mitigation Steps | Wiz↗
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CVE-2025-66043 — Stack-based Buffer Overflow | cvebase