6.5

CVE-2026-41684: linuxcontainers incus NULL Pointer Dereference

CVSS: 6.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-41684DEBIAN-CVE-2026-41684GHSA-x5r6-jr56-89pv
Published 07-05-2026Last modified 07-05-2026
Open JSON

Vulnerability summary

CVE-2026-41684 is a medium (CVSS 6.5) NULL Pointer Dereference vulnerability in linuxcontainers incus. EPSS estimates a 0.47% chance of exploitation in the next 30 days, higher than 39.3% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
36/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.47%
0%100%
Low · +0.06 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2026:21483-1

Timeline

  1. 07-05-2026
    PublishedVulnerability first disclosed.
  2. 07-05-2026
    Last modifiedVulnerability information updated.

Description

Incus is a system container and virtual machine manager. Prior to version 7.0.0, backup.GetInfo() trusts the inline backup/index.yaml config when present and only falls back to parsing the legacy backup/container/backup.yaml file if result.Config == nil. As a result, an archive can carry a valid inline config that passes the initial import preflight while also carrying a malformed legacy backup/container/backup.yaml file that is reparsed later from the restored file system. ParseConfigYamlFile() accepts YAML documents with no container section, and multiple downstream consumers then dereference. Container without checking for nil. Confirmed examples in the instance restore and import flow include backup.UpdateInstanceConfig() and internalImportFromBackup(). An authenticated user with permission to import instance backups may be able to crash the Incus daemon with a crafted backup archive whose inline backup/index.yaml is valid but whose extracted legacy backup.yaml omits container. The crash occurs in the restore path after archive extraction has begun. This issue has been patched in version 7.0.0.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.47%

Chance of exploitation in the next 30 days

Percentile

39%

Versus all other CVEs

30-day change

+0.06 pp

From 0.41% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.47%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Incus

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Debian2 products
  • incus< 6.0.4-2+deb13u7 | < 7.0.0-1
  • lxdAll versions (No fix recorded) | < 5.0.2+git20231211.1364ae4-9+deb13u6
Ubuntu2 products
  • incusAll versions (No fix recorded)
  • lxdAll versions (No fix recorded)
Github.com/lxc1 product
  • incusAll versions (No fix recorded)
Github.com/lxc/incus1 product
  • v6All versions (No fix recorded)
Github.com/lxc/incus/v6/cmd1 product
  • incusd≤ 6.23.0
Linuxcontainers1 product
Lxc1 product

7 vendors · 9 products

References

8 links