4.4

CVE-2026-47753: lxc incus NULL Pointer Dereference

CVSS: 4.4v4.0MediumDeferred
AliasesUBUNTU-CVE-2026-47753DEBIAN-CVE-2026-47753GHSA-8g7m-96c8-8wwc
Published 21-08-2026Last modified 21-08-2026
Open JSON

Vulnerability summary

CVE-2026-47753 is a medium (CVSS 4.4) NULL Pointer Dereference vulnerability in lxc incus. EPSS estimates a 0.15% chance of exploitation in the next 30 days, higher than 3.9% of scored vulnerabilities.

Overall risk
18/100
0100
Low · default modelHow is this calculated?
CVSS score
4.4/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.15%
0%100%
Low · -0.10 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 2
OPENSUSE-SU-2026:11651-1OPENSUSE-SU-2026:21483-1

Timeline

  1. 21-08-2026
    PublishedVulnerability first disclosed.
  2. 21-08-2026
    Last modifiedVulnerability information updated.

Description

Incus is a system container and virtual machine manager. Prior to version 7.1.0, `(*backend).CreateInstanceFromBackup` in `internal/server/storage/backend.go` contains a nil-pointer dereference that an authenticated user with permission to create instances in any project can trigger remotely by uploading a crafted backup tarball. The Incus daemon panics and the process crashes, causing denial of service to every project on that cluster member. This is a sibling of `GHSA-fwj8-62r8-8p8m`, `GHSA-r7w7-mmxr-47r9`, and `GHSA-x5r6-jr56-89pv` (all assigned 2026-05-04). Those patches added guards on adjacent fields of the same `backup/config.Config` struct; the `Volume` field on the instance-import path was missed. Version 7.1.0 contains an updated patch.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.15%

Chance of exploitation in the next 30 days

Percentile

4%

Versus all other CVEs

30-day change

-0.10 pp

From 0.26% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.15%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Github.com/lxc/incus2 products
  • v6All versions (No fix recorded)
  • v7< 7.1.0
Debian1 product
  • incus< 7.0.0-2
Github.com/lxc1 product
  • incusAll versions (No fix recorded)
Lxc1 product
Ubuntu1 product
  • incusAll versions (No fix recorded)

5 vendors · 6 products

References

7 links