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 8744 of biosig.c on the current master branch (35a819fa), when the Tag is 3:
else if (tag==3) {
// character code
char v[17]; // [1]
if (len>16) fprintf(stderr,"Warning MFER tag2 incorrect length %i>16\n",len);
curPos += ifread(&v,1,len,hdr);
v[len] = 0;
In this case, the overflowed buffer is the newly-declared `v` \[1\] instead of `buf`. Since `v` is only 17 bytes large, much smaller values of `len` (even those encoded using a single octet) can trigger an overflow in this code path.
References
| Link | Resource |
|---|---|
| https://talosintelligence.com/vulnerability_reports/TALOS-2025-2234 | Exploit Third Party Advisory |
Configurations
History
02 Sep 2025, 16:32
| Type | Values Removed | Values Added |
|---|---|---|
| Summary |
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| CPE | cpe:2.3:a:libbiosig_project:libbiosig:*:*:*:*:*:*:*:* | |
| References | () https://talosintelligence.com/vulnerability_reports/TALOS-2025-2234 - Exploit, Third Party Advisory | |
| First Time |
Libbiosig Project
Libbiosig Project libbiosig |
25 Aug 2025, 14:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-08-25 14:15
Updated : 2025-09-02 16:32
NVD link : CVE-2025-54481
Mitre link : CVE-2025-54481
CVE.ORG link : CVE-2025-54481
JSON object : View
Products Affected
libbiosig_project
- libbiosig
CWE
CWE-121
Stack-based Buffer Overflow