CVE-2025-54490

CRITICAL EPSS 45.9%
Published Aug 25, 202510mo ago · Modified Jun 17, 20261w ago
9.8 CVSS 3.1
Critical
Find Similar
Published Aug 25, 2025 10mo ago
Last Modified Jun 17, 2026 1w ago

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 9090 of biosig.c on the current master branch (35a819fa), when the Tag is 64: else if (tag==64) //0x40 { // preamble char tmp[256]; // [1] curPos += ifread(tmp,1,len,hdr); In this case, the overflowed buffer is the newly-declared `tmp` \[1\] instead of `buf`. While `tmp` is larger than `buf`, having a size of 256 bytes, a stack overflow can still occur in cases where `len` is encoded using multiple octets and is greater than 256.

CVSS Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
45.9% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 1

CWE-121

Affected Products 1

VendorProductVersionRange
libbiosig_projectlibbiosig* <3.9.1

References 2

  • talosintelligence.com https://talosintelligence.com/vulnerability_reports/TALOS-2025-2234
    ExploitThird Party Advisory
  • talosintelligence.com https://www.talosintelligence.com/vulnerability_reports/TALOS-2025-2234

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.