rust-rustls: Rustls from 0.23.13 before 0.23.45 accepts TLS 1.3 handshake messages at the wrong encryption level when they follow...
CVE-2026-123613 is fixed in rust-rustls on 1 platform by DEBIAN-CVE-2026-123613 (version 0.23.45+ds-1), released November 9, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Rustls from 0.23.13 before 0.23.45 accepts TLS 1.3 handshake messages at the wrong encryption level when they follow a key-changing message in the same record, because Deframer::aligned does not enforce RFC 8446 record-boundary alignment. A peer or on-path attacker can pack a plaintext EncryptedExtensions with the ServerHello, which rustls accepts unencrypted.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| rust-rustls · Debian 14 | 0.23.45+ds-1 | DEBIAN-CVE-2026-123613 | Nov 9, 2026 |
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