CVE-2026-48749
published 2026-08-21CVE-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…
PriorityP267critical9.9CVSS 3.1
AVNACLPRLUINSCCHIHAH
EPSS
0.81%
54.3th percentile
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.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| github.com | lxc_incus_v7_cmd_incusd | >= 0 < 7.2.0 | 7.2.0 |
| lxc | incus | < 7.2.0 | 7.2.0 |
CVSS provenance
nvdv3.19.9CRITICALCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
vendor_redhat9.9CRITICAL
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Red Hat
incus: Incus has an arbitrary file read+write on host via rootfs/ symlink in malicious image
vendor_redhat·2026-08-21·CVSS 9.9
CVE-2026-48749 [CRITICAL] CWE-61 incus: Incus has an arbitrary file read+write on host via rootfs/ symlink in malicious image
incus: Incus has an arbitrary file read+write on host via rootfs/ symlink in malicious image
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.
A flaw was found in Incus, a container and virtual machine manager. A crafted container image can use a symlink in the rootfs directory to read or write arbitrary files on the host, potentially leading to command execution.
Statement: Incus is not shipped in any Red Hat product. The community Fedora package is affected.
Mitigation: No mitigation is needed as Incus is not shipped in any Red Hat product.
GHSA
Incus has an arbitrary file read+write on host via rootfs/ symlink in malicious image
ghsa·2026-06-26
CVE-2026-48749 [CRITICAL] CWE-73 Incus has an arbitrary file read+write on host via rootfs/ symlink in malicious image
Incus has an arbitrary file read+write on host via rootfs/ symlink in malicious image
### Summary
A specially crafted image can be used to read or create/write arbitrary files on the host; possibly leading to arbitrary command execution.
### Details
Incus validates an image as soon as it sees a normal `metadata.yaml` and a `rootfs/` entry, but full extraction can later process a duplicate top-level `rootfs` symlink. Later, the stopped-container file API opens `d.RootfsPath()` and passes that file descriptor to `forkfile`, which chroots to it.
```
metadata.yaml
rootfs/
rootfs -> /
```
In practice, this allows a malicious actor to access the host's filesystem with root privileges.
### PoC
Below, we map the container's rootfs to `/` on the host, but it can be mapped anywhere. We the
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-48749 incus: Incus has an arbitrary file read+write on host via rootfs/ symlink in malicious image [fedora-all]
bugzilla·2026-08-26·CVSS 9.9
CVE-2026-48749 [CRITICAL] CVE-2026-48749 incus: Incus has an arbitrary file read+write on host via rootfs/ symlink in malicious image [fedora-all]
CVE-2026-48749 incus: Incus has an arbitrary file read+write on host via rootfs/ symlink in malicious image [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
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.
Bugzilla
CVE-2026-48749 incus: Incus has an arbitrary file read+write on host via rootfs/ symlink in malicious image
bugzilla·2026-08-21·CVSS 9.9
CVE-2026-48749 [CRITICAL] CVE-2026-48749 incus: Incus has an arbitrary file read+write on host via rootfs/ symlink in malicious image
CVE-2026-48749 incus: Incus has an arbitrary file read+write on host via rootfs/ symlink in malicious image
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.
2026-08-21
Published