Vulnerability in Schwehr Libais
CVE-2026-56770
libais through 0.15 VdmStream::AddLine uses an unchecked sentinel value as a vector index when processing AIS sentences with empty or out-of-range sequential message IDs. Remote attackers can crash services or vessel systems by sending crafted AIVDM sentences over VHF marine radio or IP feeds, causing out-of-bounds memory access and potential corruption.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (45.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 45.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Schwehr Libais — versions 0
Weakness classification (CWE)
References
- github.com/schwehr/libais/issues/263 (technical-description, exploit)
- www.vulncheck.com/advisories/libais-out-of-bounds-vector-access-in-vdmstream-ad… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-56770?
- CVE-2026-56770 is a high-severity vulnerability in Schwehr Libais, classified under Improper Validation of Array Index. CVSS score: 7.5/10. Published 2026-06-25.
- How severe is CVE-2026-56770?
- High severity. CVSS v3 base score is 7.5 out of 10.