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22 vulnerabilities by linuxcontainers
CVE-2026-33945 (GCVE-0-2026-33945)
Vulnerability from cvelistv5 – Published: 2026-03-26 23:27 – Updated: 2026-03-27 20:00
VLAI?
Title
Abitrary file write through systemd-creds option
Summary
Incus is a system container and virtual machine manager. Incus instances have an option to provide credentials to systemd in the guest. For containers, this is handled through a shared directory. Prior to version 6.23.0, an attacker can set a configuration key named something like `systemd.credential.../../../../../../root/.bashrc` to cause Incus to write outside of the `credentials` directory associated with the container. This makes use of the fact that the Incus syntax for such credentials is `systemd.credential.XYZ` where `XYZ` can itself contain more periods. While it's not possible to read any data this way, it's possible to write to arbitrary files as root, enabling both privilege escalation and denial of service attacks. Version 6.23.0 fixes the issue.
Severity ?
10 (Critical)
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
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CVE-2026-33898 (GCVE-0-2026-33898)
Vulnerability from cvelistv5 – Published: 2026-03-26 23:25 – Updated: 2026-03-30 11:48
VLAI?
Title
Local Incus UI web server vulnerable to nuthentication bypass
Summary
Incus is a system container and virtual machine manager. Prior to version 6.23.0, the web server spawned by `incus webui` incorrectly validates the authentication token such that an invalid value will be accepted. `incus webui` runs a local web server on a random localhost port. For authentication, it provides the user with a URL containing an authentication token. When accessed with that token, Incus creates a cookie persisting that token without needing to include it in subsequent HTTP requests. While the Incus client correctly validates the value of the cookie, it does not correctly validate the token when passed int the URL.
This allows for an attacker able to locate and talk to the temporary web server on localhost to have as much access to Incus as the user who ran `incus webui`. This can lead to privilege escalation by another local user or an access to the user's Incus instances and possibly system resources by a remote attack able to trick the local user into interacting with the Incus UI web server. Version 6.23.0 patches the issue.
Severity ?
8.8 (High)
CWE
- CWE-287 - Improper Authentication
Assigner
References
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CVE-2026-33897 (GCVE-0-2026-33897)
Vulnerability from cvelistv5 – Published: 2026-03-26 22:43 – Updated: 2026-03-27 20:02
VLAI?
Title
Incus vulnerable to arbitrary file read and write through pongo templates
Summary
Incus is a system container and virtual machine manager. Prior to version 6.23.0, instance template files can be used to cause arbitrary read or writes as root on the host server. Incus allows for pongo2 templates within instances which can be used at various times in the instance lifecycle to template files inside of the instance. This particular implementation of pongo2 within Incus allowed for file read/write but with the expectation that the pongo2 chroot feature would isolate all such access to the instance's filesystem. This was allowed such that a template could theoretically read a file and then generate a new version of said file. Unfortunately the chroot isolation mechanism is entirely skipped by pongo2 leading to easy access to the entire system's filesystem with root privileges. Version 6.23.0 patches the issue.
Severity ?
10 (Critical)
CWE
- CWE-1336 - Improper Neutralization of Special Elements Used in a Template Engine
Assigner
References
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CVE-2026-33743 (GCVE-0-2026-33743)
Vulnerability from cvelistv5 – Published: 2026-03-26 22:40 – Updated: 2026-03-27 13:53
VLAI?
Title
Incus vulnerable to denial of source through crafted bucket backup file
Summary
Incus is a system container and virtual machine manager. Prior to version 6.23.0, a specially crafted storage bucket backup can be used by an user with access to Incus' storage bucket feature to crash the Incus daemon. Repeated use of this attack can be used to keep the server offline causing a denial of service of the control plane API. This does not impact any running workload, existing containers and virtual machines will keep operating. Version 6.23.0 fixes the issue.
Severity ?
6.5 (Medium)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
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CVE-2026-33711 (GCVE-0-2026-33711)
Vulnerability from cvelistv5 – Published: 2026-03-26 22:37 – Updated: 2026-03-27 20:00
VLAI?
Title
Incus vulnerable to local privilege escalation through VM screenshot path
Summary
Incus is a system container and virtual machine manager. Incus provides an API to retrieve VM screenshots. That API relies on the use of a temporary file for QEMU to write the screenshot to which is then picked up and sent to the user prior to deletion. As versions prior to 6.23.0 use predictable paths under /tmp for this, an attacker with local access to the system can abuse this mechanism by creating their own symlinks ahead of time. On the vast majority of Linux systems, this will result in a "Permission denied" error when requesting a screenshot. That's because the Linux kernel has a security feature designed to block such attacks, `protected_symlinks`. On the rare systems with this purposefully disabled, it's then possible to trick Incus intro truncating and altering the mode and permissions of arbitrary files on the filesystem, leading to a potential denial of service or possible local privilege escalation. Version 6.23.0 fixes the issue.
Severity ?
CWE
- CWE-61 - UNIX Symbolic Link (Symlink) Following
Assigner
References
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CVE-2026-33542 (GCVE-0-2026-33542)
Vulnerability from cvelistv5 – Published: 2026-03-26 22:32 – Updated: 2026-03-30 11:47
VLAI?
Title
Incus does not verify combined fingerprint when downloading images from simplestreams servers
Summary
Incus is a system container and virtual machine manager. Prior to version 6.23.0, a lack of validation of the image fingerprint when downloading from simplestreams image servers opens the door to image cache poisoning and under very narrow circumstances exposes other tenants to running attacker controlled images rather than the expected one. Version 6.23.0 patches the issue.
Severity ?
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
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CVE-2026-23954 (GCVE-0-2026-23954)
Vulnerability from cvelistv5 – Published: 2026-01-22 21:45 – Updated: 2026-01-26 21:02
VLAI?
Title
Incus container image templating arbitrary host file read and write
Summary
Incus is a system container and virtual machine manager. Versions 6.21.0 and below allow a user with the ability to launch a container with a custom image (e.g a member of the ‘incus’ group) to use directory traversal or symbolic links in the templating functionality to achieve host arbitrary file read, and host arbitrary file write. This ultimately results in arbitrary command execution on the host. When using an image with a metadata.yaml containing templates, both the source and target paths are not checked for symbolic links or directory traversal. This can also be exploited in IncusOS. A fix is planned for versions 6.0.6 and 6.21.0, but they have not been released at the time of publication.
Severity ?
8.7 (High)
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
| URL | Tags | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||
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}
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CVE-2026-23953 (GCVE-0-2026-23953)
Vulnerability from cvelistv5 – Published: 2026-01-22 21:39 – Updated: 2026-01-26 21:00
VLAI?
Title
Incus container environment configuration newline injection
Summary
Incus is a system container and virtual machine manager. In versions 6.20.0 and below, a user with the ability to launch a container with a custom YAML configuration (e.g a member of the ‘incus’ group) can create an environment variable containing newlines, which can be used to add additional configuration items in the container’s lxc.conf due to newline injection. This can allow adding arbitrary lifecycle hooks, ultimately resulting in arbitrary command execution on the host. Exploiting this issue on IncusOS requires a slight modification of the payload to change to a different writable directory for the validation step (e.g /tmp). This can be confirmed with a second container with /tmp mounted from the host (A privileged action for validation only). A fix is planned for versions 6.0.6
and 6.21.0, but they have not been released at the time of publication.
Severity ?
8.7 (High)
CWE
- CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
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CVE-2025-64507 (GCVE-0-2025-64507)
Vulnerability from cvelistv5 – Published: 2025-11-10 21:56 – Updated: 2025-11-12 20:13
VLAI?
Title
Incus vulnerable to local privilege escalation through custom storage volumes
Summary
Incus is a system container and virtual machine manager. An issue in versions prior to 6.0.6 and 6.19.0 affects any Incus user in an environment where an unprivileged user may have root access to a container with an attached custom storage volume that has the `security.shifted` property set to `true` as well as access to the host as an unprivileged user. The most common case for this would be systems using `incus-user` with the less privileged `incus` group to provide unprivileged users with an isolated restricted access to Incus. Such users may be able to create a custom storage volume with the necessary property (depending on kernel and filesystem support) and can then write a setuid binary from within the container which can be executed as an unprivileged user on the host to gain root privileges. A patch for this issue is expected in versions 6.0.6 and 6.19.0. As a workaround, permissions can be manually restricted until a patched version of Incus is deployed.
Severity ?
CWE
- CWE-269 - Improper Privilege Management
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
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CVE-2022-47952 (GCVE-0-2022-47952)
Vulnerability from cvelistv5 – Published: 2023-01-01 00:00 – Updated: 2025-04-10 19:16
VLAI?
Summary
lxc-user-nic in lxc through 5.0.1 is installed setuid root, and may allow local users to infer whether any file exists, even within a protected directory tree, because "Failed to open" often indicates that a file does not exist, whereas "does not refer to a network namespace path" often indicates that a file exists. NOTE: this is different from CVE-2018-6556 because the CVE-2018-6556 fix design was based on the premise that "we will report back to the user that the open() failed but the user has no way of knowing why it failed"; however, in many realistic cases, there are no plausible reasons for failing except that the file does not exist.
Severity ?
CWE
- n/a
Assigner
References
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CVE-2017-18641 (GCVE-0-2017-18641)
Vulnerability from cvelistv5 – Published: 2020-02-10 00:30 – Updated: 2024-08-05 21:28
VLAI?
Summary
In LXC 2.0, many template scripts download code over cleartext HTTP, and omit a digital-signature check, before running it to bootstrap containers.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
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| URL | Tags | ||||
|---|---|---|---|---|---|
|
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CVE-2015-1340 (GCVE-0-2015-1340)
Vulnerability from cvelistv5 – Published: 2019-04-22 15:35 – Updated: 2024-09-17 01:10
VLAI?
Title
chmod race in doUidshiftIntoContainer
Summary
LXD before version 0.19-0ubuntu5 doUidshiftIntoContainer() has an unsafe Chmod() call that races against the stat in the Filepath.Walk() function. A symbolic link created in that window could cause any file on the system to have any mode of the attacker's choice.
Severity ?
CWE
- Race condition.
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
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Impacted products
Date Public ?
2015-10-02 00:00
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CVE-2019-5736 (GCVE-0-2019-5736)
Vulnerability from cvelistv5 – Published: 2019-02-11 00:00 – Updated: 2024-08-04 20:01
VLAI?
Summary
runc through 1.0-rc6, as used in Docker before 18.09.2 and other products, allows attackers to overwrite the host runc binary (and consequently obtain host root access) by leveraging the ability to execute a command as root within one of these types of containers: (1) a new container with an attacker-controlled image, or (2) an existing container, to which the attacker previously had write access, that can be attached with docker exec. This occurs because of file-descriptor mishandling, related to /proc/self/exe.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
Date Public ?
2019-02-11 00:00
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CVE-2018-6556 (GCVE-0-2018-6556)
Vulnerability from cvelistv5 – Published: 2018-08-10 15:00 – Updated: 2024-09-17 03:38
VLAI?
Title
The lxc-user-nic component of LXC allows unprivileged users to open arbitrary files
Summary
lxc-user-nic when asked to delete a network interface will unconditionally open a user provided path. This code path may be used by an unprivileged user to check for the existence of a path which they wouldn't otherwise be able to reach. It may also be used to trigger side effects by causing a (read-only) open of special kernel files (ptmx, proc, sys). Affected releases are LXC: 2.0 versions above and including 2.0.9; 3.0 versions above and including 3.0.0, prior to 3.0.2.
Severity ?
No CVSS data available.
CWE
- Incorrect access control
Assigner
References
| URL | Tags | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
Impacted products
Date Public ?
2018-08-06 00:00
Credits
Matthias Gerstner from SUSE
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CVE-2016-8649 (GCVE-0-2016-8649)
Vulnerability from cvelistv5 – Published: 2017-05-01 06:08 – Updated: 2024-08-06 02:27
VLAI?
Summary
lxc-attach in LXC before 1.0.9 and 2.x before 2.0.6 allows an attacker inside of an unprivileged container to use an inherited file descriptor, of the host's /proc, to access the rest of the host's filesystem via the openat() family of syscalls.
Severity ?
No CVSS data available.
CWE
- container bypass
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| n/a | LXC before 1.0.9 and 2.x before 2.0.6 |
Affected:
LXC before 1.0.9 and 2.x before 2.0.6
|
Date Public ?
2017-05-01 00:00
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CVE-2017-5985 (GCVE-0-2017-5985)
Vulnerability from cvelistv5 – Published: 2017-03-14 17:00 – Updated: 2024-08-05 15:18
VLAI?
Summary
lxc-user-nic in Linux Containers (LXC) allows local users with a lxc-usernet allocation to create network interfaces on the host and choose the name of those interfaces by leveraging lack of netns ownership check.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | ||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||
Date Public ?
2017-03-09 00:00
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CVE-2016-10124 (GCVE-0-2016-10124)
Vulnerability from cvelistv5 – Published: 2017-01-09 08:48 – Updated: 2024-08-06 03:14
VLAI?
Summary
An issue was discovered in Linux Containers (LXC) before 2016-02-22. When executing a program via lxc-attach, the nonpriv session can escape to the parent session by using the TIOCSTI ioctl to push characters into the terminal's input buffer, allowing an attacker to escape the container.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||
Date Public ?
2017-01-09 00:00
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CVE-2015-1335 (GCVE-0-2015-1335)
Vulnerability from cvelistv5 – Published: 2015-10-01 20:00 – Updated: 2024-08-06 04:40
VLAI?
Summary
lxc-start in lxc before 1.0.8 and 1.1.x before 1.1.4 allows local container administrators to escape AppArmor confinement via a symlink attack on a (1) mount target or (2) bind mount source.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | ||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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|||||||||||||||||||||||||||||||||||||||||
Date Public ?
2015-09-29 00:00
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CVE-2015-1331 (GCVE-0-2015-1331)
Vulnerability from cvelistv5 – Published: 2015-08-12 14:00 – Updated: 2024-08-06 04:40
VLAI?
Summary
lxclock.c in LXC 1.1.2 and earlier allows local users to create arbitrary files via a symlink attack on /run/lock/lxc/*.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
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Date Public ?
2015-07-22 00:00
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CVE-2015-1334 (GCVE-0-2015-1334)
Vulnerability from cvelistv5 – Published: 2015-08-12 14:00 – Updated: 2024-08-06 04:40
VLAI?
Summary
attach.c in LXC 1.1.2 and earlier uses the proc filesystem in a container, which allows local container users to escape AppArmor or SELinux confinement by mounting a proc filesystem with a crafted (1) AppArmor profile or (2) SELinux label.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
Date Public ?
2015-07-16 00:00
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CVE-2014-1425 (GCVE-0-2014-1425)
Vulnerability from cvelistv5 – Published: 2015-01-07 19:00 – Updated: 2024-08-06 09:42
VLAI?
Summary
cmanager 0.32 does not properly enforce nesting when modifying cgroup properties, which allows local users to set cgroup values for all cgroups via unspecified vectors.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Date Public ?
2015-01-05 00:00
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CVE-2013-6441 (GCVE-0-2013-6441)
Vulnerability from cvelistv5 – Published: 2014-02-14 15:00 – Updated: 2024-08-06 17:39
VLAI?
Summary
The lxc-sshd template (templates/lxc-sshd.in) in LXC before 1.0.0.beta2 uses read-write permissions when mounting /sbin/init, which allows local users to gain privileges by modifying the init file.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
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Date Public ?
2014-02-12 00:00
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