# CVE-2026-22891: biosig-tools: A heap-based buffer overflow vulnerability exists in the Intan CLP parsing functionality of The Biosig Project libbio...

CVE-2026-22891 is fixed in 5 products on 1 platform, first by biosig-tools 2.3.3-1ubuntu0.1~esm1, released March 3, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-22891
- Priority: High
- CVSS: 9.8 (Medium)
- EPSS: 0.0068
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 3, 2026

## Description

A heap-based buffer overflow vulnerability exists in the Intan CLP parsing functionality of The Biosig Project libbiosig 3.9.2 and Master Branch (db9a9a63). A specially crafted Intan CLP file can lead to arbitrary code execution. An attacker can provide a malicious file to trigger this vulnerability.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | biosig Debian 14 | 3.9.5-1 | [DEBIAN-CVE-2026-22891](https://patchblox.com/security/data/fix/linux/debian-cve-2026-22891.md) | Mar 3, 2026 |
| Linux | biosig-tools Ubuntu 22.04.1 LTS (jammy) | 2.3.3-1ubuntu0.1~esm1 | [biosig-tools 2.3.3-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-biosig-tools-2.3.3-1ubuntu0.1-esm1.md) | Mar 3, 2026 |
| Linux | biosig-tools Ubuntu 24.04.5 LTS (noble) | 2.6.0-1ubuntu1+esm1 | [biosig-tools 2.6.0-1ubuntu1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-biosig-tools-2.6.0-1ubuntu1-esm1.md) | Mar 3, 2026 |
| Linux | biosig-tools Ubuntu 26.04.1 LTS (resolute) | 3.9.0-1ubuntu0.1~esm1 | [biosig-tools 3.9.0-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-biosig-tools-3.9.0-1ubuntu0.1-esm1.md) | Mar 3, 2026 |
| Linux | libbiosig3 Ubuntu 22.04.1 LTS (jammy) | 2.3.3-1ubuntu0.1~esm1 | [libbiosig3 2.3.3-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libbiosig3-2.3.3-1ubuntu0.1-esm1.md) | Mar 3, 2026 |
| Linux | libbiosig3 Ubuntu 24.04.5 LTS (noble) | 2.6.0-1ubuntu1+esm1 | [libbiosig3 2.6.0-1ubuntu1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libbiosig3-2.6.0-1ubuntu1-esm1.md) | Mar 3, 2026 |
| Linux | libbiosig3 Ubuntu 26.04.1 LTS (resolute) | 3.9.0-1ubuntu0.1~esm1 | [libbiosig3 3.9.0-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libbiosig3-3.9.0-1ubuntu0.1-esm1.md) | Mar 3, 2026 |
| Linux | octave-biosig Ubuntu 22.04.1 LTS (jammy) | 2.3.3-1ubuntu0.1~esm1 | [octave-biosig 2.3.3-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-octave-biosig-2.3.3-1ubuntu0.1-esm1.md) | Mar 3, 2026 |
| Linux | octave-biosig Ubuntu 24.04.5 LTS (noble) | 2.6.0-1ubuntu1+esm1 | [octave-biosig 2.6.0-1ubuntu1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-octave-biosig-2.6.0-1ubuntu1-esm1.md) | Mar 3, 2026 |
| Linux | octave-biosig Ubuntu 26.04.1 LTS (resolute) | 3.9.0-1ubuntu0.1~esm1 | [octave-biosig 3.9.0-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-octave-biosig-3.9.0-1ubuntu0.1-esm1.md) | Mar 3, 2026 |
| Linux | python3-biosig Ubuntu 22.04.1 LTS (jammy) | 2.3.3-1ubuntu0.1~esm1 | [python3-biosig 2.3.3-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-python3-biosig-2.3.3-1ubuntu0.1-esm1.md) | Mar 3, 2026 |
| Linux | python3-biosig Ubuntu 24.04.5 LTS (noble) | 2.6.0-1ubuntu1+esm1 | [python3-biosig 2.6.0-1ubuntu1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-python3-biosig-2.6.0-1ubuntu1-esm1.md) | Mar 3, 2026 |
| Linux | python3-biosig Ubuntu 26.04.1 LTS (resolute) | 3.9.0-1ubuntu0.1~esm1 | [python3-biosig 3.9.0-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-python3-biosig-3.9.0-1ubuntu0.1-esm1.md) | Mar 3, 2026 |

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Data as of 2026-11-09T13:31:49Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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