Lxd: security update (CVE-2026-48751)
Incus is a system container and virtual machine manager. Prior to version 7.2.0, instance snapshots ignore the `restricted.containers.lowlevel=block` setting; allowing for arbitrary command execution on the Incus server by abusing lowlevel hooks such as `raw.lxc` and `raw.qemu`. Version 7.2.0 patches the issue.
AI Analysis
Technical Summary
CVE-2026-48751 is a critical vulnerability in Incusd server versions before 7.2.0. The vulnerability arises because instance snapshots bypass the restricted.containers.lowlevel=block setting, which is intended to restrict container operations. Attackers can abuse this to execute arbitrary commands on the host with root privileges by leveraging lowlevel hooks like raw.lxc and raw.qemu. The attack vector involves crafting malicious snapshots locally, transferring them to a restricted project, and restoring them to execute commands on the server. This vulnerability has a CVSS 3.1 base score of 9.9, indicating critical severity with network attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation allows an attacker with local privileges to bypass project restrictions and execute arbitrary commands on the host with root privileges. This compromises the confidentiality, integrity, and availability of the affected system, potentially leading to full system takeover.
Mitigation Recommendations
A patch is available that fixes this vulnerability in Incusd server version 7.2.0 and later. Users should upgrade to version 7.2.0 or newer to remediate this issue. No additional mitigation steps are indicated beyond applying the official fix.
Lxd: security update (CVE-2026-48751)
Description
Incus is a system container and virtual machine manager. Prior to version 7.2.0, instance snapshots ignore the `restricted.containers.lowlevel=block` setting; allowing for arbitrary command execution on the Incus server by abusing lowlevel hooks such as `raw.lxc` and `raw.qemu`. Version 7.2.0 patches the issue.
CVSS v3.1
Score 9.9critical
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-48751 is a critical vulnerability in Incusd server versions before 7.2.0. The vulnerability arises because instance snapshots bypass the restricted.containers.lowlevel=block setting, which is intended to restrict container operations. Attackers can abuse this to execute arbitrary commands on the host with root privileges by leveraging lowlevel hooks like raw.lxc and raw.qemu. The attack vector involves crafting malicious snapshots locally, transferring them to a restricted project, and restoring them to execute commands on the server. This vulnerability has a CVSS 3.1 base score of 9.9, indicating critical severity with network attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation allows an attacker with local privileges to bypass project restrictions and execute arbitrary commands on the host with root privileges. This compromises the confidentiality, integrity, and availability of the affected system, potentially leading to full system takeover.
Mitigation Recommendations
A patch is available that fixes this vulnerability in Incusd server version 7.2.0 and later. Users should upgrade to version 7.2.0 or newer to remediate this issue. No additional mitigation steps are indicated beyond applying the official fix.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-48q5-w887-33wv
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-48751"]
- Ecosystems
- ["Go"]
- Database Specific Severity
- CRITICAL
- Cvss Version
- 3.1
Threat ID: 6a3ef78f27e9c79719ff5c83
Added to database: 06/26/2026, 22:05:03 UTC
Last enriched: 08/22/2026, 11:09:11 UTC
Last updated: 09/13/2026, 07:15:17 UTC
Views: 107
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