Critical severity · published Aug 25, 2025
CVE-2025-54483
A stack-based buffer overflow vulnerability exists in the MFER parsing functionality of The Biosig Project libbiosig 3.9.0 and Master Branch (35a819fa)
9.8
CVSS
0.7%
EPSS
No
On KEV
Description
A stack-based buffer overflow vulnerability exists in the MFER parsing functionality of The Biosig Project libbiosig 3.9.0 and Master Branch (35a819fa). A specially crafted MFER file can lead to arbitrary code execution. An attacker can provide a malicious file to trigger this vulnerability.This vulnerability manifests on line 8759 of biosig.c on the current master branch (35a819fa), when the Tag is 5:
else if (tag==5) //0x05: number of channels
{
uint16_t oldNS=hdr->NS;
if (len>4) fprintf(stderr,"Warning MFER tag5 incorrect length %i>4\n",len);
curPos += ifread(buf,1,len,hdr);
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 52% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Libbiosig · Libbiosig Project
before 3.9.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-54483
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-54483
Exploit
https://talosintelligence.com/vulnerability_reports/TALOS-2025-2234
www.talosintelligence.com
https://www.talosintelligence.com/vulnerability_reports/TALOS-2025-2234
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