Eugeny russh up to 0.60.x SERVER Message allocation of resources

Summaryinfo

A vulnerability was found in Eugeny russh up to 0.60.x. It has been rated as problematic. The affected element is an unknown function of the component SERVER Message Handler. This manipulation causes allocation of resources. This vulnerability is handled as CVE-2026-48110. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Eugeny russh up to 0.60.x. It has been declared as problematic. Affected by this vulnerability is an unknown function of the component SERVER Message Handler. The manipulation with an unknown input leads to a allocation of resources vulnerability. The CWE definition for the vulnerability is CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. As an impact it is known to affect availability. The summary by CVE is:

Russh is a Rust SSH client & server library. From version 0.34.0 to before version 0.61.0, several russh client and server message handlers decoded attacker-controlled SSH strings, name-lists, and byte fields into owned allocations before applying field-specific bounds. A remote SSH peer could send oversized, high-fanout, or malformed length-prefixed fields and make the library allocate, attempt to allocate, or split data before rejecting input that should have been rejected earlier. This issue has been patched in version 0.61.0.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-48110 since 05/20/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 320681 (Linux Distros Unpatched Vulnerability : CVE-2026-48110), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 0.61.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (320681) and EUVD (EUVD-2026-36131). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• Eugeny

Name

• russh

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16
• 0.17
• 0.18
• 0.19
• 0.20
• 0.21
• 0.22
• 0.23
• 0.24
• 0.25
• 0.26
• 0.27
• 0.28
• 0.29
• 0.30
• 0.31
• 0.32
• 0.33
• 0.34
• 0.35
• 0.36
• 0.37
• 0.38
• 0.39
• 0.40
• 0.41
• 0.42
• 0.43
• 0.44
• 0.45
• 0.46
• 0.47
• 0.48
• 0.49
• 0.50
• 0.51
• 0.52
• 0.53
• 0.54
• 0.55
• 0.56
• 0.57
• 0.58
• 0.59
• 0.60

Website

• Product: https://github.com/Eugeny/russh/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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