SB2026061840 - Link following in Podman

Description

This security bulletin contains information about 1 vulnerability.

1) Link following (CVE-ID: CVE-2026-55686)

CWE-ID: CWE-59 - Improper Link Resolution Before File Access ('Link Following')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to modify files or directories on the host filesystem.

The vulnerability exists due to improper link resolution in WORKDIR path handling when processing a malicious container image with a symlink in the WORKDIR path. A remote attacker can run a crafted container image to modify files or directories on the host filesystem.

A race condition may also allow ownership changes on the host filesystem if an untrusted process mutates the host filesystem tree during path dereferencing.

Remediation

Install update from vendor's website.

References

• https://github.com/podman-container-tools/podman/security/advisories/GHSA-q6r4-3wmg-fwcq
• https://github.com/podman-container-tools/podman/commit/d18e44e9abb3bf5b7294aa70806e1368fdddfdd0