PatchTheCVECVE-2025-54462: A heap-based buffer overflow vulnerability exists in the Nex parsing functionality of The Biosig Project libbi
CVE-2025-54462 is a critical-severity flaw (CVSS 9.8) affecting libbiosig. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
A heap-based buffer overflow vulnerability exists in the Nex parsing functionality of The Biosig Project libbiosig 3.9.0 and Master Branch (35a819fa). A specially crafted .nex file can lead to arbitrary code execution. An attacker can provide a malicious file to trigger this vulnerability.
Why this priority
- Critical severity
- Public exploit reference
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.8 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.7% (top 46%) |
| CISA exploited list | No |
| Weakness | CWE-122 |
| Published | 2025-08-25 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2025-54462?
libbiosig: upgrade to 3.9.1. Exact commands for each OS are on this page.
Is CVE-2025-54462 being exploited?
CVE-2025-54462 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2025-54462 affect?
CVE-2025-54462 affects libbiosig. Severity is critical (CVSS 9.8). A heap-based buffer overflow vulnerability exists in the Nex parsing functionality of The Biosig Project libbiosig 3.9.0 and Master Branch (35a819fa). A specially crafted .nex file can lead to arbitrary code execution. An attacker can provi
How urgent is CVE-2025-54462?
Priority 58/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action
Related CVEs
- CVE-2026-22891 CRITICAL 9.8 DOWNGRADE A heap-based buffer overflow vulnerability exists in the Intan CLP parsing functionality of The Biosig Project
- CVE-2026-20777 HIGH 8.1 DOWNGRADE A heap-based buffer overflow vulnerability exists in the Nicolet WFT parsing functionality of The Biosig Proje
- CVE-2025-64736 MEDIUM 6.1 DOWNGRADE An out-of-bounds read vulnerability exists in the ABF parsing functionality of The Biosig Project libbiosig 3.
- CVE-2025-54494 CRITICAL 9.8 UPGRADE A stack-based buffer overflow vulnerability exists in the MFER parsing functionality of The Biosig Project lib
- CVE-2025-54493 CRITICAL 9.8 UPGRADE A stack-based buffer overflow vulnerability exists in the MFER parsing functionality of The Biosig Project lib