DSA-6373-1 lxd - security update

unknownCVE-2026-9639 CVE-2026-9640 CVE-2026-48749 CVE-2026-48750 CVE-2026-48751 CVE-2026-48752

Multiple security issues were discovered in LXD, a system container and virtual machine manager, which could result in a bypass of security restrictions or the execution of arbitrary commands. https://security-tracker.debian.org/tracker/DSA-6373-1

CSIRTS triage

vendor: LXD product: LXD Authentication bypass Remote code execution

What: Multiple security issues in LXD could allow bypass of security restrictions or execution of arbitrary commands.
Who is affected: Deployments of LXD are affected.
Urgency: Remediation is necessary due to the potential for serious security breaches.
Action: Apply the latest security update for LXD.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Debian Security Advisories (INTL · vendor-psirt · site)
Severity: unknown
Published: 2026-06-28
Exploitation: Not in CISA KEV at last sync

Original advisory: https://lists.debian.org/debian-security-announce/2026/msg00284.html

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-96390.55% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 43% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-96400.63% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 48% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-487490.81% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 54% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-487500.78% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 53% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-487510.70% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 50% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-487520.81% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 54% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-487550.44% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 36% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-487690.44% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 36% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-556210.20% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 10% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-556220.20% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 10% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-9639	coverage & exploitation status	NVD · CVE.org
CVE-2026-9640	coverage & exploitation status	NVD · CVE.org
CVE-2026-48749	coverage & exploitation status	NVD · CVE.org
CVE-2026-48750	coverage & exploitation status	NVD · CVE.org
CVE-2026-48751	coverage & exploitation status	NVD · CVE.org
CVE-2026-48752	coverage & exploitation status	NVD · CVE.org
CVE-2026-48755	coverage & exploitation status	NVD · CVE.org
CVE-2026-48769	coverage & exploitation status	NVD · CVE.org
CVE-2026-55621	coverage & exploitation status	NVD · CVE.org
CVE-2026-55622	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.