Out-of-Bounds Affecting google-guest-agent package, versions <20250116.00-0ubuntu1~20.04.0+esm3


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.62% (47th percentile)

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  • Snyk IDSNYK-UBUNTU2004-GOOGLEGUESTAGENT-16800739
  • published17 Jun 2026
  • disclosed22 May 2026

Introduced: 22 May 2026

CVE-2026-39830  (opens in a new tab)
CWE-119  (opens in a new tab)

How to fix?

Upgrade Ubuntu:20.04 google-guest-agent to version 20250116.00-0ubuntu1~20.04.0+esm3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream google-guest-agent package and not the google-guest-agent package as distributed by Ubuntu. See How to fix? for Ubuntu:20.04 relevant fixed versions and status.

A malicious SSH peer could send unsolicited global request responses to fill an internal buffer, blocking the connection's read loop. The blocked goroutine could not be released by calling Close(), resulting in a resource leak per connection. Unsolicited global responses are now discarded.

References

CVSS Base Scores

version 3.1