Improper Preservation of Permissions Affecting container-tools:rhel8/slirp4netns package, versions <0:1.2.0-3.module+el8.8.0+23884+2031fc78


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.6% (46th percentile)

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  • Snyk IDSNYK-RHEL8-CONTAINERTOOLS-18536233
  • published5 Aug 2026
  • disclosed22 May 2026

Introduced: 22 May 2026

CVE-2026-39832  (opens in a new tab)
CWE-281  (opens in a new tab)

How to fix?

Upgrade RHEL:8 container-tools:rhel8/slirp4netns to version 0:1.2.0-3.module+el8.8.0+23884+2031fc78 or higher.
This issue was patched in RHSA-2026:49944.

NVD Description

Note: Versions mentioned in the description apply only to the upstream container-tools:rhel8/slirp4netns package and not the container-tools:rhel8/slirp4netns package as distributed by RHEL. See How to fix? for RHEL: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.

CVSS Base Scores

version 3.1