How severe is CVE-2026-63298?

CVE-2026-63298 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-63298 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-63298?

CVE-2026-63298 affects Canonical Lxd. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-63298?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2026-63298 published?

CVE-2026-63298 was published on 2026-08-12 and last updated on 2026-09-11.

CVE-2026-63298

CVE-2026-63298 is a critical-severity vulnerability in Canonical Lxd with a CVSS 3.x base score of 9.9. 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-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.9)
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Canonical Lxd
Published: 2026-08-12
Last modified: 2026-09-11

Description

An improper neutralization of special elements vulnerability in LXD's NVIDIA instance configuration handling allows an authenticated attacker to inject arbitrary configuration directives. By supplying newline characters within the 'nvidia.driver.capabilities' or 'nvidia.require.*' configuration values, an attacker can manipulate the generated lxc.conf file. This flaw enables the attacker to execute arbitrary code on the host system with the privileges of the LXD daemon.

Frequently asked questions

What is CVE-2026-63298?: An improper neutralization of special elements vulnerability in LXD's NVIDIA instance configuration handling allows an authenticated attacker to inject arbitrary configuration directives. By supplying newline characters within the 'nvidia.driver.capabilities' or 'nvidia.require.*' configuration values, an attacker can manipulate the generated lxc.conf file. This flaw enables the attacker to execute arbitrary code on the host system with the privileges of the LXD daemon.
How severe is CVE-2026-63298?: CVE-2026-63298 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-63298 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-63298?: CVE-2026-63298 affects Canonical Lxd. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-63298?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2026-63298 published?: CVE-2026-63298 was published on 2026-08-12 and last updated on 2026-09-11.

References

https://github.com/canonical/lxd/security/advisories/GHSA-vfh7-q59q-54v2

Affected products (1)

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

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