Deserialization of Untrusted Data Affecting container-selinux package, versions <2:2.229.0-3.module+el8.10.0+40223+e940a224


Severity

Recommended
high

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.6% (46th percentile)

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  • Snyk IDSNYK-ROCKY8-CONTAINERSELINUX-17874352
  • published7 Jul 2026
  • disclosed22 May 2026

Introduced: 22 May 2026

CVE-2026-39832  (opens in a new tab)
CWE-502  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:8 container-selinux to version 2:2.229.0-3.module+el8.10.0+40223+e940a224 or higher.
This issue was patched in RLSA-2026:35833.

NVD Description

Note: Versions mentioned in the description apply only to the upstream container-selinux package and not the container-selinux package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:8 relevant fixed versions and status.

When adding a key to a remote agent constraint extensions such as restrict-destination-v00@openssh.com were not serialized in the request. Destination restrictions were silently stripped when forwarding keys, allowing unrestricted use of the key on the remote host. The client now serializes all constraint extensions. Additionally, the in-memory keyring returned by NewKeyring() now rejects keys with unsupported constraint extensions instead of silently ignoring them.

References

CVSS Base Scores

version 3.1