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Vulnerability · Published Aug 25, 2025 · Assigned by talos

CVE-2025-53853

Critical 9.8

In plain English

A critical-severity heap buffer overflow in libbiosig from The Biosig Project. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 61% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.9%top 39.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A heap-based buffer overflow vulnerability exists in the ISHNE parsing functionality of The Biosig Project libbiosig 3.9.0 and Master Branch (35a819fa). A specially crafted ISHNE ECG annotations file can lead to arbitrary code execution. An attacker can provide a malicious file to trigger this vulnerability.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12biosigno fix listedDEBIAN-CVE-2025-53853
Debian:13biosigno fix listedDEBIAN-CVE-2025-53853
Debian:14biosig3.9.5-1DEBIAN-CVE-2025-53853
Ubuntu:25.10biosigno fix listedUBUNTU-CVE-2025-53853
Ubuntu:26.10biosigno fix listedUBUNTU-CVE-2025-53853

Affected products (as reported)

VendorProductVersions
The Biosig Project libbiosig 3.9.0Master Branch (35a819fa)

Weakness: CWE-122 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References