CVE-2026-126410
EUVD-2026-12503313.11.2026, 10:17
Wasmtime's wasmtime-wasi crate 48.0.0 before 48.0.8, 49.0.0 before 49.0.5, and 50.0.0 before 50.0.1 contains a time-of-check/time-of-use race in the wasip3 wasi:sockets udp-socket host implementation that lets guests bypass socket_addr_check send restrictions. A malicious guest can race udp-socket.send against udp-socket.connect to deliver attacker-controlled datagrams to addresses the policy permits only for receiving.
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources
(CNA/ADP records, vendor advisories, Enginsight analysis).
| Vendor | Product | Version | Source |
|---|---|---|---|
| bytecodealliance | wasmtime | 48.0.0 ≤ 𝑥 < 48.0.8 | CNA |
| bytecodealliance | wasmtime | 49.0.0 ≤ 𝑥 < 49.0.5 | CNA |
| bytecodealliance | wasmtime | 50.0.0 ≤ 𝑥 < 50.0.1 | CNA |
Ubuntu Releases