Is CVE-2026-9639 in the CISA KEV catalog?

No. CVE-2026-9639 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-9639?

CVE-2026-9639 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2026-9639?

CVE-2026-9639 has an EPSS score of 0.38% (29th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-9639?

Upgrade lxd on debian 13 to 5.0.2+git20231211.1364ae4-9+deb13u7 or later.

CVE & CISA-KEV Catalog

CVE-2026-9639

MEDIUM

6.5

CVSS v3

NVD

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.

CWE-476NULL Pointer Dereference

How to fix

Remediation Available

lxdDebian

Fixed in:5.0.2+git20231211.1364ae4-9+deb13u7CVE-2026-9639

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

0.38%probability of exploitation in 30 days

29thpercentile

Low risk: more likely to be exploited than 29% of all known CVEs.

References

Other references3

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-26.