USN-8713-1: BioSig vulnerabilities
Mark Bereza and Lilith Wyatt discovered that BioSig incorrectly handled certain crafted input files. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-22891, CVE-2026-20777)
CSIRTS triage
- What
- Improper handling of crafted input files allows denial of service or arbitrary code execution.
- Who is affected
- BioSig users processing untrusted input files.
- Urgency
- Unknown severity but arbitrary code execution capability requires prompt patching.
- Action
- Apply available security updates for CVE-2026-22891 and CVE-2026-20777.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://ubuntu.com/security/notices/USN-8713-1
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-228910.59% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 46% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-207770.51% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 42% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-22891 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-20777 | coverage & exploitation status | NVD · CVE.org |
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