Vulnerability · Published Jun 25, 2026 · Assigned by VulnCheck
CVE-2026-56770libais 0.15 - Out-of-bounds Vector Access in VdmStream::AddLine via Invalid Sequential Message ID
High 7.5
In plain English
A high-severity security flaw in libais from schwehr. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.6%top 52.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | python-libais | no fix listed | DEBIAN-CVE-2026-56770 |
| Debian:13 | python-libais | no fix listed | DEBIAN-CVE-2026-56770 |
| Debian:14 | python-libais | no fix listed | DEBIAN-CVE-2026-56770 |
| Ubuntu:22.04:LTS | python-libais | no fix listed | UBUNTU-CVE-2026-56770 |
| Ubuntu:24.04:LTS | python-libais | no fix listed | UBUNTU-CVE-2026-56770 |
| Ubuntu:25.10 | python-libais | no fix listed | UBUNTU-CVE-2026-56770 |
| Ubuntu:26.04:LTS | python-libais | no fix listed | UBUNTU-CVE-2026-56770 |
| Ubuntu:26.10 | python-libais | no fix listed | UBUNTU-CVE-2026-56770 |
Affected products (as reported)
Weakness: CWE-129 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- Researcher Disclosure technical-description, exploit
- https://www.vulncheck.com/advisories/libais-out-of-bounds-vector-access-in-vdmstream-addline-via-invalid-sequential-message-id third-party-advisory