Improper Validation of Array Index Affecting rust-russh package, versions <0.64.1-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN14-RUSTRUSSH-20941724
- published15 Oct 2026
- disclosed13 Aug 2026
Introduced: 13 Aug 2026
CVE-2026-73489 (opens in a new tab)How to fix?
Upgrade Debian:14 rust-russh to version 0.64.1-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream rust-russh package and not the rust-russh package as distributed by Debian.
See How to fix? for Debian:14 relevant fixed versions and status.
Russh is a Rust SSH client & server library. Prior to 0.62.4, an authenticated SSH client can cause a denial of service by sending a pty-req channel request with more than 130 terminal-mode records. The parser in russh/src/server/encrypted.rs stores terminal modes in a fixed 130-entry [(Pty::TTY_OP_END, 0); 130] array but continues increasing the mode count, then constructs an out-of-bounds slice and panics before the application pty_request handler runs. The panic terminates the server session task without causing memory corruption. This issue is fixed in version 0.62.4.