Integer Overflow or Wraparound Affecting k9s package, versions <0.50.18-r28


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.47% (37th percentile)

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  • Snyk IDSNYK-WOLFILATEST-K9S-16902979
  • published27 May 2026
  • disclosed22 May 2026

Introduced: 22 May 2026

CVE-2026-39834  (opens in a new tab)
CWE-190  (opens in a new tab)

How to fix?

Upgrade Wolfi k9s to version 0.50.18-r28 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream k9s package and not the k9s package as distributed by Wolfi. See How to fix? for Wolfi relevant fixed versions and status.

When writing data larger than 4GB in a single Write call on an SSH channel, an integer overflow in the internal payload size calculation caused the write loop to spin indefinitely, sending empty packets without making progress. The size comparison now uses int64 to prevent truncation.

CVSS Base Scores

version 3.1