How severe is CVE-2026-9639?

CVE-2026-9639 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-9639 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-9639?

CVE-2026-9639 affects Canonical Lxd. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-9639?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2026-9639 published?

CVE-2026-9639 was published on 2026-06-26 and last updated on 2026-07-02.

CVE-2026-9639

CVE-2026-9639 is a medium-severity vulnerability in Canonical Lxd with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-476.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Canonical Lxd
Published: 2026-06-26
Last modified: 2026-07-02

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.

Frequently asked questions

What is CVE-2026-9639?: 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.
How severe is CVE-2026-9639?: CVE-2026-9639 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-9639 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-9639?: CVE-2026-9639 affects Canonical Lxd. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-9639?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-9639 published?: CVE-2026-9639 was published on 2026-06-26 and last updated on 2026-07-02.

References

Affected products (1)

cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*

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