6.5

CVE-2026-9639: canonical lxd NULL Pointer Dereference

CVSS: 6.5v3.1MediumAnalyzed
AliasesDEBIAN-CVE-2026-9639
Published 26-06-2026Last modified 26-06-2026
Open JSON

Vulnerability summary

CVE-2026-9639 is a medium (CVSS 6.5) NULL Pointer Dereference vulnerability in canonical lxd. EPSS estimates a 0.55% chance of exploitation in the next 30 days, higher than 44.7% 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
0.55%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Timeline

  1. 26-06-2026
    PublishedVulnerability first disclosed.
  2. 26-06-2026
    Last modifiedVulnerability information updated.

Description

Nil-pointer dereference in CreateCustomVolumeFromBackup in LXD up to version 6.8 and 5.21 on Linux allows an authenticated user with can_create_storage_volumes permissions to cause a denial of service via a specially crafted custom-volume backup tarball that omits the expires_at snapshot field.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.55%

Chance of exploitation in the next 30 days

Percentile

45%

Versus all other CVEs

30-day change

0.00 pp

From 0.55% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.55%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Lxd

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Canonical1 product
  • lxd≥ 5.21.0, < 5.21.5 | ≥ 5.0.0, < 5.21.5 | ≥ 6.0, < 6.9
Debian1 product
  • lxdAll versions (No fix recorded) | < 5.0.2+git20231211.1364ae4-9+deb13u7

2 vendors · 2 products

References

4 links