UBUNTU-CVE-2026-102820

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Source

https://ubuntu.com/security/CVE-2026-102820

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-102820.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-102820

Upstream

CVE-2026-102820

Published

2026-09-29T19:17:00Z

Modified

2026-10-17T12:57:56Z

Severity

6.2 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

pageant provides a [PageantStream] type that implements [AsyncRead] and [AsyncWrite] traits and can be used to talk to a running Pageant instance. Prior to pageant 0.2.3, the Windows pageant crate's pageant/src/wmmessage.rs MemoryMap::read function trusts a peer-controlled u32 response length supplied through the 8192-byte Pageant shared-memory mapping reached by AgentClient::connect_pageant. A local process that impersonates the Pageant window can make query_pageant_direct allocate up to approximately 4 GiB and copy beyond the mapped view, reliably crashing a russh client and conditionally exposing adjacent committed memory. This issue is fixed in pageant 0.2.3.

References

Affected packages

Ubuntu:26.10 / rust-russh

Package

Name: rust-russh
Purl: pkg:deb/ubuntu/rust-russh?arch=source&distro=stonking

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.57.1-2

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "librust-russh-dev",
            "binary_version":  "0.57.1-2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-102820.json"