Libbiosig · Libbiosig · CVE-2025-54489
**Name of the Vulnerable Software and Affected Versions:**
libbiosig versions 3.9.0 and Master Branch (35a819fa)
**Description:**
A stack-based buffer overflow vulnerability exists in the MFER parsing functionality. A specially crafted MFER file can lead to arbitrary code execution. The vulnerability occurs when processing the Tag 63 in `biosig.c` on line 8970, where the number of bytes read is determined by `len2`, which can be as large as 255, while the destination buffer `buf` has a size of only 128 bytes.
**Recommendations:**
libbiosig version 3.9.0: At the moment, there is no information about a newer version that contains a fix for this vulnerability.
libbiosig Master Branch (35a819fa): At the moment, there is no information about a newer version that contains a fix for this vulnerability.