CVE-2026-63125
Incus vulnerable to root RCE via image backup.yaml symlink
Incus is a system container and virtual machine manager. Prior to version 7.3.0, an unprivileged, project-confined Incus user (a non-admin TLS/RBAC identity with can_create_images and can_create_instances) can execute arbitrary code as root on the host. A crafted image ships backup.yaml as a symlink to a host file. When the root daemon writes the instance's backup file, it follows the symlink. Version 7.3.0 patches the issue.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Incus vulnerable to root RCE via image backup.yaml symlink
Incus is a system container and virtual machine manager. Prior to version 7.3.0, an unprivileged, project-confined Incus user (a non-admin TLS/RBAC identity with can_create_images and can_create_instances) can execute arbitrary code as root on the host. A crafted image ships backup.yaml as a symlink to a host file. When the root daemon writes the instance's backup file, it follows the symlink. Version 7.3.0 patches the issue.
- Record
CVE-2026-63125- CVSS 3.1
- 9.9 Critical
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-59, CWE-61
- Updated
- 2026-11-02
EUVDEUVD-2026-63952
Incus is a system container and virtual machine manager. Prior to version 7.3.0, an unprivileged, project-confined Incus user (a non-admin TLS/RBAC identity with can_create_images and can_create_instances) can execute arbitrary code as root on the host. A crafted image ships backup.yaml as a symlink to a host file. When the root daemon writes the instance's backup file, it follows the symlink. Version 7.3.0 patches the issue.
- Record
EUVD-2026-63952- CVSS 3.1
- 9.9 Critical
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - Updated
- 2026-11-02
NVD
Incus is a system container and virtual machine manager. Prior to version 7.3.0, an unprivileged, project-confined Incus user (a non-admin TLS/RBAC identity with can_create_images and can_create_instances) can execute arbitrary code as root on the host. A crafted image ships backup.yaml as a symlink to a host file. When the root daemon writes the instance's backup file, it follows the symlink. Version 7.3.0 patches the issue.
- Record
CVE-2026-63125- CVSS 3.1
- 9.9 Critical
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-59, CWE-61
- Updated
- 2026-11-02
OSV
Incus vulnerable to root RCE via image backup.yaml symlink
Incus is a system container and virtual machine manager. Prior to version 7.3.0, an unprivileged, project-confined Incus user (a non-admin TLS/RBAC identity with can_create_images and can_create_instances) can execute arbitrary code as root on the host. A crafted image ships backup.yaml as a symlink to a host file. When the root daemon writes the instance's backup file, it follows the symlink. Version 7.3.0 patches the issue.
- Record
CVE-2026-63125- CVSS 3.1
- 9.9 Critical
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-59, CWE-61
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-63125
Incus is a system container and virtual machine manager. Prior to version 7.3.0, an unprivileged, project-confined Incus user (a non-admin TLS/RBAC identity with can_create_images and can_create_instances) can execute arbitrary code as root on the host. A crafted image ships backup.yaml as a symlink to a host file. When the root daemon writes the instance's backup file, it follows the symlink. Version 7.3.0 patches the issue.
- Record
DEBIAN-CVE-2026-63125- CVSS 3.1
- 9.9 Critical
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-63125
Incus is a system container and virtual machine manager. Prior to version 7.3.0, an unprivileged, project-confined Incus user (a non-admin TLS/RBAC identity with can_create_images and can_create_instances) can execute arbitrary code as root on the host. A crafted image ships backup.yaml as a symlink to a host file. When the root daemon writes the instance's backup file, it follows the symlink. Version 7.3.0 patches the issue.
- Record
UBUNTU-CVE-2026-63125- CVSS 3.1
- 9.9 Critical
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - Updated
- 2026-11-02
OSVopenSUSE-SU-2026:11651-1 No score
incus-7.4-1.1 on GA media
These are all security issues fixed in the incus-7.4-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2026:11651-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
incusDebian:13 |
before 6.0.4-2+deb13u9, plus listed versions 6.0.4-26.0.4-2+deb13u16.0.4-2+deb13u1~bpo12+16.0.4-2+deb13u26.0.4-2+deb13u2~bpo12+1 Show 11 moreShow less6.0.4-2+deb13u36.0.4-2+deb13u3~bpo12+16.0.4-2+deb13u46.0.4-2+deb13u4~bpo12+16.0.4-2+deb13u56.0.4-2+deb13u5~bpo12+16.0.4-2+deb13u66.0.4-2+deb13u6~bpo12+16.0.4-2+deb13u76.0.4-2+deb13u7~bpo12+16.0.4-2+deb13u8 |
6.0.4-2+deb13u9 |
incusDebian:14 |
before 7.0.1-2, plus listed versions 6.0.4-26.0.4-36.0.5-16.0.5-26.0.5-3 Show 27 moreShow less6.0.5-46.0.5-56.0.5-66.0.5-76.0.5-86.0.6-16.0.6-26.0.6-36.14.0-1~exp16.15.0-1~exp16.16.0-1~exp16.17.0-1~exp16.20.0-1~exp16.21.0-1~exp16.22.0-1~exp16.23.0-1~exp17.0.0-17.0.0-1~bpo13+17.0.0-27.0.0-2~bpo13+17.0.0-37.0.0-47.0.0-57.0.0-5~bpo13+17.0.1-17.0.1-1~bpo13+17.0.1-2~bpo13+1 |
7.0.1-2 |
incusUbuntu:Pro:24.04:LTS |
All versions, plus listed versions 0.4-1ubuntu10.5.1-10.5.1-30.6-16.0.0-1 Show 7 moreShow less6.0.0-1ubuntu0.16.0.0-1ubuntu0.26.0.0-1ubuntu0.2+esm16.0.0-1ubuntu0.36.0.0-1ubuntu0.3+esm16.0.0-1ubuntu0.3+esm26.0.0-1ubuntu0.3+esm3 |
None known |
incusUbuntu:26.10 |
All versions, plus listed versions 6.0.5-87.0.1-5 |
None known |
incusUbuntu:Pro:26.04:LTS |
All versions, plus listed versions 6.0.4-26.0.5-86.0.5-8ubuntu0.26.04.1~esm1 |
None known |
incusopenSUSE:Tumbleweed |
before 7.4-1.1 | 7.4-1.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-63125 is a critical vulnerability (CVSS 9.9) in Lxc Incus, published August 21, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.66%, the 51st percentile. Fixed in incus 6.0.4-2+deb13u9.
References
github.com/lxc/incus/security/advisories/GHSA-6rqx-22hc-qm36
nvd.nist.gov/vuln/detail/CVE-2026-63125
security-tracker.debian.org/tracker/CVE-2026-63125
ubuntu.com/security/CVE-2026-63125
cve.org/CVERecord?id=CVE-2026-63125
Show 22 moreShow less
suse.com/security/cve/CVE-2026-39402