Lxd: security update (CVE-2026-48749)
Incus is a system container and virtual machine manager. Prior to version 7.2.0, a specially crafted image can be used to read or create/write arbitrary files on the host; possibly leading to arbitrary command execution. Version 7.2.0 fixes the issue.
AI Analysis
Technical Summary
CVE-2026-48749 affects Incus versions before 7.2.0 and involves improper handling of a duplicate top-level rootfs symlink in container images. A specially crafted container image can include a malicious rootfs symlink that points to the host root directory, allowing Incus to perform arbitrary file reads and writes on the host system with root privileges. This can lead to disclosure of sensitive files such as /etc/shadow and arbitrary command execution on the host. The vulnerability is classified under CWE-73 (External Control of File Name or Path). The CVSS v3.1 base score is 9.9, indicating critical severity. A patch is available to fix this vulnerability.
Potential Impact
Successful exploitation allows an attacker to read and write arbitrary files on the host system with root privileges, potentially leading to full system compromise. Sensitive files like /etc/shadow can be read, and arbitrary files can be written anywhere on the host, enabling command execution and complete control over the affected system.
Mitigation Recommendations
A patch for this vulnerability is available in Incus version 7.2.0 and later. Users should upgrade to version 7.2.0 or newer to remediate this issue. There are no vendor advisories indicating that no action is required or that the issue is already mitigated. Until patched, avoid running untrusted container images with Incus.
Lxd: security update (CVE-2026-48749)
Description
Incus is a system container and virtual machine manager. Prior to version 7.2.0, a specially crafted image can be used to read or create/write arbitrary files on the host; possibly leading to arbitrary command execution. Version 7.2.0 fixes 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-2026-48749 affects Incus versions before 7.2.0 and involves improper handling of a duplicate top-level rootfs symlink in container images. A specially crafted container image can include a malicious rootfs symlink that points to the host root directory, allowing Incus to perform arbitrary file reads and writes on the host system with root privileges. This can lead to disclosure of sensitive files such as /etc/shadow and arbitrary command execution on the host. The vulnerability is classified under CWE-73 (External Control of File Name or Path). The CVSS v3.1 base score is 9.9, indicating critical severity. A patch is available to fix this vulnerability.
Potential Impact
Successful exploitation allows an attacker to read and write arbitrary files on the host system with root privileges, potentially leading to full system compromise. Sensitive files like /etc/shadow can be read, and arbitrary files can be written anywhere on the host, enabling command execution and complete control over the affected system.
Mitigation Recommendations
A patch for this vulnerability is available in Incus version 7.2.0 and later. Users should upgrade to version 7.2.0 or newer to remediate this issue. There are no vendor advisories indicating that no action is required or that the issue is already mitigated. Until patched, avoid running untrusted container images with Incus.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-2q3f-q5pq-g8wv
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-48749"]
- Ecosystems
- ["Go"]
- Database Specific Severity
- CRITICAL
- Cvss Version
- 3.1
Threat ID: 6a3ef79127e9c79719ff6ef6
Added to database: 06/26/2026, 22:05:05 UTC
Last enriched: 08/22/2026, 11:08:56 UTC
Last updated: 09/11/2026, 22:06:33 UTC
Views: 99
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