CVE Feed

    Dashboard / CVE / CVE-2026-102821

    CVE-2026-102821

    Russh is a Rust SSH client and server library. Prior to 0.63.2, an authenticated remote peer can send SSH_MSG_KEXINIT without the required SSH_MSG_KEX_ECDH_INIT and then flood SSH_MSG_CHANNEL_OPEN messages while SessionKexState::InProgress prevents priority_receiver in russh/src/server/session.rs from being drained. The server continues processing network input and enqueues a ChannelOpenReply for each request on an unbounded channel, allowing one connection to grow memory until the process is terminated. This issue is fixed in version 0.63.2.

    Published:Sep 29, 2026
    Last Modified:Sep 30, 2026
    EPS:Sep 29, 2026
    EPSS Score:0.00295
    CVSS Score:6.5

    Affected Products

    Vendor
    Eugeny
    Product
    Russh

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-116794 (CVSS 8.3) — russh is a Rust SSH client and server library that includes an SSH agent protocol implementation. From 0.50.0-…
    CVE-2026-116775 (CVSS 2.3) — pageant provides a PageantStream type that implements AsyncRead and AsyncWrite traits and can be used to commu…
    CVE-2026-116774 (CVSS 4.3) — russh is a Rust SSH client and server library that includes an SSH agent protocol implementation. From 0.60.0 …
    CVE-2026-116773 (CVSS 4.3) — russh is a Rust SSH client and server library that includes an SSH agent protocol implementation. Prior to 0.6…
    CVE-2026-116696 (CVSS 3.3) — russh is a Rust SSH client and server library that includes an SSH agent protocol implementation. Prior to 0.6…
    CVE-2026-111061 (CVSS 4.3) — russh is a Rust SSH client and server library that includes an SSH agent protocol implementation. Prior to 0.6…
    CVE-2026-102825 (CVSS 3.7) — Russh is a Rust SSH client and server library. Prior to 0.62.6, the USERAUTH_REQUEST path reached from server:…
    CVE-2026-102824 (CVSS 4.3) — Russh is a Rust SSH client and server library. Prior to 0.63.0, the hybrid ML-KEM 768 and X25519 implementatio…
    CVE-2026-102823 (CVSS 7.5) — Russh is a Rust SSH client and server library. Prior to 0.63.1, client_read_authenticated in russh/src/client/…
    CVE-2026-102822 (CVSS 3.7) — Russh is a Rust SSH client and server library. Prior to 0.63.1, a connection configured to permit mac=none can…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High