Detections
Analytics

SCA: security update for github.com/lxc/incus/v6 (GHSA-q9vp-3wcg-8p4x)

medium Tenable Cloud Security Plugin ID 439355

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Incus is a system container and virtual machine manager. Incus provides an API to retrieve VM screenshots.
 That API relies on the use of a temporary file for QEMU to write the screenshot to which is then picked up
 and sent to the user prior to deletion. As versions prior to 6.23.0 use predictable paths under /tmp for
 this, an attacker with local access to the system can abuse this mechanism by creating their own symlinks
 ahead of time. On the vast majority of Linux systems, this will result in a "Permission denied" error when
 requesting a screenshot. That's because the Linux kernel has a security feature designed to block such
 attacks, `protected_symlinks`. On the rare systems with this purposefully disabled, it's then possible to
 trick Incus intro truncating and altering the mode and permissions of arbitrary files on the filesystem,
 leading to a potential denial of service or possible local privilege escalation. Version 6.23.0 fixes the
 issue. (CVE-2026-33711)

Solution

Update the github.com/lxc/incus/v6 library and its related packages to version 6.23.0 or later.

See Also

https://github.com/advisories/GHSA-q9vp-3wcg-8p4x

Plugin Details

Severity: Medium

ID: 439355

Version: Revision 1.4

Type: Local

Family: SCA Checks

Published: 3/27/2026

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

Percentile: 96.96

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.3

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2026-33711

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 5.7

Threat Score: 4.7

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 3/27/2026

Vulnerability Publication Date: 3/26/2026

Reference Information

CVE: CVE-2026-33711

cwe: CWE-61