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16 vulnerabilities found for Ubuntu 24.04 LTS by Canonical
CVE-2026-8933 (GCVE-0-2026-8933)
Vulnerability from nvd – Published: 2026-07-21 14:02 – Updated: 2026-07-22 18:28
VLAI
EPSS
VEX
Title
snap-confine Local Privilege Escalation via Capabilities Misconfiguration or Flaw in Execution Environment Setup
Summary
A local privilege escalation vulnerability exists in snap-confine, a set-capabilities core component used internally by Canonical snapd to construct the secure execution environment for snap applications. This vulnerability uniquely affects versions of snap-confine configured with set-capabilities (rather than standard set-uid-root installations).
Due to a flaw in how privilege boundaries or security sandboxes are initialized when the binary runs under limited ambient capabilities, a local, unprivileged attacker can exploit this behavior to bypass intended restrictions and execute arbitrary code. Successful exploitation allows the local user to elevate their privileges to full root authority.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-22 18:15 UTC
CWE
- CWE-250 - Execution with unnecessary privileges
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://ubuntu.com/security/CVE-2026-8933 | vdb-entryissue-tracking |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
|
Affected:
2.75.0 , < 2.76.1
(semver)
|
|||
| Canonical | Ubuntu 26.04 LTS |
Unaffected:
2.76+ubuntu26.04.3
(dpkg)
|
|
| Canonical | Ubuntu 24.04 LTS |
Unaffected:
2.76+ubuntu24.04.1
(dpkg)
|
|
| Canonical | Ubuntu 22.04 LTS |
Unaffected:
2.76+ubuntu22.04.1
(dpkg)
|
Date Public
2026-07-21 02:00
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CVE-2026-15226 (GCVE-0-2026-15226)
Vulnerability from nvd – Published: 2026-07-21 14:02 – Updated: 2026-07-22 18:28
VLAI
EPSS
VEX
Title
snapd snap-confine Sandbox Confinement Bypass via Omission of setuid Restriction in Seccomp Templates
Summary
A sandbox confinement bypass vulnerability exists in Canonical snapd within its internal execution environment compiler (snap-confine). The default seccomp security templates generated by the engine to restrict system calls do not filter or reject process operations capable of creating or manipulating file execution flags with set-user-ID attributes. Consequently, an application running within a strictly confined snap environment can successfully compile or drop binaries and apply setuid properties to them. If a compromised or malicious process inside the snap sandbox executes these generated setuid binaries, it can potentially circumvent architectural sandboxing assumptions, drop intended restriction policies, or execute privileged actions inside the container namespace that should otherwise be strictly blocked. The vulnerability has been resolved by hardening the seccomp template engine to block the execution and creation of setuid executables by sandboxed snap processes.
Severity
8.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-22 18:15 UTC
CWE
- CWE-250 - Execution with unnecessary privileges
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://ubuntu.com/security/CVE-2026-15226 | vdb-entryissue-tracking |
Impacted products
7 products
| Vendor | Product | Version | |
|---|---|---|---|
|
Affected:
0 , < 2.76.1
(semver)
|
|||
| Canonical | Ubuntu 26.04 LTS |
Unaffected:
2.76+ubuntu26.04.3
(dpkg)
|
|
| Canonical | Ubuntu 24.04 LTS |
Unaffected:
2.76+ubuntu24.04.1
(dpkg)
|
|
| Canonical | Ubuntu 22.04 LTS |
Unaffected:
2.76+ubuntu22.04.1
(dpkg)
|
|
| Canonical | Ubuntu 20.04 LTS |
Unaffected:
2.67.1+20.04ubuntu1~esm2
(dpkg)
|
|
| Canonical | Ubuntu 18.04 LTS |
Unaffected:
2.61.4ubuntu0.18.04.1+esm3
(dpkg)
|
|
| Canonical | Ubuntu 16.04 LTS |
Unaffected:
2.61.4ubuntu0.16.04.1+esm3
|
Date Public
2026-07-21 14:00
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CVE-2024-5300 (GCVE-0-2024-5300)
Vulnerability from nvd – Published: 2026-07-21 14:00 – Updated: 2026-07-22 18:28
VLAI
EPSS
VEX
Title
AppArmor Base Profile Misconfiguration in snapd Permits Confined Snaps Unauthorized Access to Hashed Passwords via systemd-userdbd
Summary
An access control bypass and information disclosure vulnerability exists in the base AppArmor security profile configuration of Canonical snapd. The abstraction rules located in /etc/apparmor.d/abstractions/nss-systemd (inherited via ) inadvertently permit strictly confined snap applications, which lack the privileged account-control interface, to interact directly with the io.systemd.Multiplexer and io.systemd.NameServiceSwitch UNIX domain sockets under /run/systemd/userdb/.
On systems where the systemd-userdbd service is installed and operational, the service fails to distinguish between an unconfined root user on the host system and a restricted root user running within a snap application's sandbox (such as a daemon or configuration hook). Because systemd-userdbd returns "complete" user records—including sensitive hashed user passwords from /etc/shadow—when queried by a process running as root, a compromised or malicious strictly confined snap executing code as root can successfully query the Varlink interface to retrieve all system password hashes, bypassing intended snap sandbox restrictions. This issue is mitigated by the fact that systemd-userdbd is not installed by default on standard Ubuntu deployments.
Severity
5.6 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-22 18:13 UTC
CWE
- CWE-212 - Improper removal of sensitive information before storage or transfer
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://ubuntu.com/security/CVE-2024-5300 | vdb-entryissue-tracking |
Impacted products
7 products
| Vendor | Product | Version | |
|---|---|---|---|
|
Affected:
0 , < 2.76.1
(semver)
|
|||
| Canonical | Ubuntu 26.04 LTS |
Unaffected:
2.76+ubuntu26.04.3
(dpkg)
|
|
| Canonical | Ubuntu 24.04 LTS |
Unaffected:
2.76+ubuntu24.04.1
(dpkg)
|
|
| Canonical | Ubuntu 22.04 LTS |
Unaffected:
2.76+ubuntu22.04.1
(dpkg)
|
|
| Canonical | Ubuntu 20.04 LTS |
Unaffected:
2.67.1+20.04ubuntu1~esm2
(dpkg)
|
|
| Canonical | Ubuntu 18.04 LTS |
Unaffected:
2.61.4ubuntu0.18.04.1+esm3
(dpkg)
|
|
| Canonical | Ubuntu 16.04 LTS |
Unaffected:
2.61.4ubuntu0.16.04.1+esm3
|
Date Public
2026-07-21 14:00
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CVE-2026-9494 (GCVE-0-2026-9494)
Vulnerability from nvd – Published: 2026-07-16 12:12 – Updated: 2026-07-16 15:11
VLAI
EPSS
VEX
Title
ubuntu-pro-client Information Disclosure via Cleartext Bearer Token Exposure in Process Command Line
Summary
An information disclosure vulnerability exists in Canonical ubuntu-pro-client (formerly ubuntu-advantage-tools). The client validates Ubuntu Pro APT credentials by executing /usr/lib/apt/apt-helper using the download-file command. During this process, the secret bearer token is embedded directly in
the cleartext URL component passed via the command-line arguments (argv), resulting in a URL format such as https://bearer:<token>@esm.ubuntu.com/.../. On systems utilizing a default-mounted /proc file system where process-hiding mitigations (such as hidepid) are disabled, an unprivileged local attacker can
monitor system processes and read the sensitive bearer token directly from /proc/cmdline while the helper process is actively running. This leaked token can subsequently be used to gain unauthorized access to the victim's Ubuntu Pro or Expanded Security Maintenance (ESM) repositories.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-16 13:36 UTC
CWE
- CWE-214 - Invocation of process using visible sensitive information
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://ubuntu.com/security/CVE-2026-9494 | vdb-entry |
Impacted products
8 products
| Vendor | Product | Version | |
|---|---|---|---|
| Canonical | ubuntu-pro-client (ubuntu-advantage-tools) |
Affected:
0 , < 37.3
(python)
|
|
| Canonical | Ubuntu 26.04 LTS |
Unaffected:
37.2ubuntu0.1
(dpkg)
|
|
| Canonical | Ubuntu 24.04 LTS |
Unaffected:
37.2ubuntu~24.04.1
(dpkg)
|
|
| Canonical | Ubuntu 22.04 LTS |
Unaffected:
37.2ubuntu~22.04.1
(dpkg)
|
|
| Canonical | Ubuntu 20.04 LTS |
Unaffected:
37.1ubuntu0~20.04.1
(dpkg)
|
|
| Canonical | Ubuntu 18.04 LTS |
Unaffected:
37.1ubuntu0~18.04.1
(dpkg)
|
|
| Canonical | Ubuntu 16.04 LTS |
Unaffected:
37.1ubuntu0~16.04.1
(dpkg)
|
|
| Canonical | Ubuntu 14.04 LTS |
Unaffected:
19.7ubuntu0.1
(dpkg)
|
Date Public
2026-07-16 12:00
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CVE-2026-12391 (GCVE-0-2026-12391)
Vulnerability from nvd – Published: 2026-07-16 12:17 – Updated: 2026-07-16 13:28
VLAI
EPSS
VEX
Title
ubuntu-pro-client Local Privilege Escalation and Information Disclosure via Symlink Arbitrary File Read in collect-logs
Summary
An insecure symlink following vulnerability exists in Canonical ubuntu-pro-client (formerly ubuntu-advantage-tools) within the pro collect-logs command framework. The utility creates or utilizes predictable temporary file paths or user-accessible log directories when gathering diagnostic information without verifying the file type or ownership. An unprivileged local attacker can exploit this behavior by creating a symbolic link (symlink) at a predictable destination path pointing to an arbitrary, root-readable file (such as /etc/shadow or private files within /root). When a root administrator or operator subsequently executes the pro collect-logs command, the tool follows the user-controlled symlink, reads the target file, and compresses its contents into the resulting diagnostic support archive. Because the output archive remains readable by the unprivileged user, the attacker can extract and read the sensitive root-owned files, leading to a complete information disclosure of system secrets.
Severity
5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-16 13:20 UTC
CWE
- CWE-59 - Improper link resolution before file access ('link following')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://ubuntu.com/security/CVE-2026-12391 | vdb-entry |
Impacted products
7 products
| Vendor | Product | Version | |
|---|---|---|---|
| Canonical | ubuntu-pro-client (ubuntu-advantage-tools) |
Affected:
0 , < 37.3
(python)
|
|
| Canonical | Ubuntu 26.04 LTS |
Unaffected:
37.2ubuntu0.1
(dpkg)
|
|
| Canonical | Ubuntu 24.04 LTS |
Unaffected:
37.2ubuntu~24.04.1
(dpkg)
|
|
| Canonical | Ubuntu 22.04 LTS |
Unaffected:
37.2ubuntu~22.04.1
(dpkg)
|
|
| Canonical | Ubuntu 20.04 LTS |
Unaffected:
37.1ubuntu0~20.04.1
(dpkg)
|
|
| Canonical | Ubuntu 18.04 LTS |
Unaffected:
37.1ubuntu0~18.04.1
(dpkg)
|
|
| Canonical | Ubuntu 16.04 LTS |
Unaffected:
37.1ubuntu0~16.04.1
(dpkg)
|
Date Public
2026-07-16 12:00
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CVE-2026-11386 (GCVE-0-2026-11386)
Vulnerability from nvd – Published: 2026-07-16 12:16 – Updated: 2026-07-16 13:31
VLAI
EPSS
VEX
Title
ubuntu-pro-client Input Validation Vulnerability Leading to Arbitrary APT Directive Injection and Remote Code Execution
Summary
An input validation and injection vulnerability exists in Canonical ubuntu-pro-client (formerly ubuntu-advantage-tools). The client constructs APT source files (such as /etc/apt/sources.list.d/ubuntu-.list or their DEB822 equivalents) using data received directly from the contract server response via the directives.suites[] and directives.aptURL fields. Because the client utilizes Python's str.format() to write these files without performing escaping, validation, or newline character filtering, a malicious or tampered contract response containing embedded newline (\n) characters can successfully inject arbitrary, attacker-controlled deb configuration lines into root-owned APT sources. When combined with the unvalidated additionalPackages[] field—which is passed positionally into a root-executed apt-get install command—an attacker capable of spoofing or manipulating the contract response (e.g., via a compromised internal infrastructure, an intercepted connection utilizing a trusted CA, or local logical bugs) can force the client to fetch and install malicious packages. This ultimately leads to arbitrary code execution with root privileges on the affected system. This component is preinstalled on supported Ubuntu Server releases and auto-attaches by default on cloud provider Ubuntu Pro images.
Severity
9 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-16 13:30 UTC
CWE
- CWE-20 - Improper input validation
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://ubuntu.com/security/CVE-2026-11386 | vdb-entry |
Impacted products
8 products
| Vendor | Product | Version | |
|---|---|---|---|
| Canonical | ubuntu-pro-client (ubuntu-advantage-tools) |
Affected:
0 , < 37.3
(python)
|
|
| Canonical | Ubuntu 26.04 LTS |
Unaffected:
37.2ubuntu0.1
(dpkg)
|
|
| Canonical | Ubuntu 24.04 LTS |
Unaffected:
37.2ubuntu~24.04.1
(dpkg)
|
|
| Canonical | Ubuntu 22.04 LTS |
Unaffected:
37.2ubuntu~22.04.1
(dpkg)
|
|
| Canonical | Ubuntu 20.04 LTS |
Unaffected:
37.1ubuntu0~20.04.1
(dpkg)
|
|
| Canonical | Ubuntu 18.04 LTS |
Unaffected:
37.1ubuntu0~18.04.1
(dpkg)
|
|
| Canonical | Ubuntu 16.04 LTS |
Unaffected:
37.1ubuntu0~16.04.1
(dpkg)
|
|
| Canonical | Ubuntu 14.04 LTS |
Unaffected:
19.7ubuntu0.1
(dpkg)
|
Date Public
2026-07-16 12:00
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CVE-2026-12249 (GCVE-0-2026-12249)
Vulnerability from nvd – Published: 2026-06-22 15:43 – Updated: 2026-06-22 17:30
VLAI
EPSS
VEX
Title
Canonical ADSys Trust Store Poisoning via Plaintext HTTP Certificate Auto-Enrollment
Summary
An issue was discovered in Canonical ADSys upstream versions through v0.16.2. During Active Directory Certificate Services (AD CS) certificate auto-enrollment via the vendored Samba client script (internal/policies/certificate/python/vendor_samba/gp/gp_cert_auto_enroll_ext.py), ADSys utilizes a plaintext HTTP connection (http://) instead of a secure HTTPS connection (https://) to request the CA certificate from the Active Directory Certificate Services server (GetCACert). An unauthenticated network attacker positioned between the managed Ubuntu host and the configured AD CS CA hostname can conduct a Man-in-the-Middle (MITM) attack. By intercepting the plaintext HTTP request, the attacker can supply an arbitrary, attacker-controlled Root CA certificate. Because the system automatically accepts this certificate and registers it into the local system trust store via update-ca-certificates, this results in system-wide trust store poisoning. Consequently, TLS clients utilizing the operating system trust store on the affected machine will accept rogue certificates for arbitrary domains, enabling persistent decryption and interception of subsequent TLS connections. This issue is resolved in version v0.16.3.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-22 17:30 UTC
CWE
- CWE-348 - Improper verification of cryptographic signature
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://ubuntu.com/security/CVE-2026-12249 | vdb-entryissue-tracking |
| https://github.com/ubuntu/adsys/commit/8b1939f96d… | patch |
Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
|
Affected:
0.13.0 , < 0.16.3
(semver)
|
|||
| Canonical | Ubuntu 20.04 LTS |
Unaffected:
0.9.2~20.04.2ubuntu0.1+esm2
(dpkg)
|
|
| Canonical | Ubuntu 22.04 LTS |
Unaffected:
0.16.3~22.04.2ubuntu0.22.04.1
(dpkg)
|
|
| Canonical | Ubuntu 24.04 LTS |
Unaffected:
0.16.3~24.04.2ubuntu0.24.04.1
(dpkg)
|
|
| Canonical | Ubuntu 25.10 |
Unaffected:
0.16.3
(dpkg)
|
|
| Canonical | Ubuntu 26.04 LTS |
Unaffected:
0.16.4ubuntu1
(dpkg)
|
Date Public
2026-06-19 11:58
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CVE-2026-3888 (GCVE-0-2026-3888)
Vulnerability from nvd – Published: 2026-03-17 14:02 – Updated: 2026-03-18 08:59
VLAI
EPSS
VEX
Title
Local Privilege Escalation in snapd
Summary
Local privilege escalation in snapd on Linux allows local attackers to get root privilege by re-creating snap's private /tmp directory when systemd-tmpfiles is configured to automatically clean up this directory. This issue affects Ubuntu 16.04 LTS, 18.04 LTS, 20.04 LTS, 22.04 LTS, and 24.04 LTS.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-17 00:00 UTC
CWE
- CWE-268 - Privilege chaining
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://ubuntu.com/security/CVE-2026-3888 | vdb-entryissue-tracking |
| https://ubuntu.com/security/notices/USN-8102-1 | vendor-advisory |
| https://discourse.ubuntu.com/t/snapd-local-privil… | technical-descriptionvendor-advisory |
| https://blog.qualys.com/vulnerabilities-threat-re… | technical-descriptionmedia-coverage |
| https://cdn2.qualys.com/advisory/2026/03/17/snap-… | technical-descriptionmedia-coverage |
| http://www.openwall.com/lists/oss-security/2026/03/18/1 |
Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
|
Affected:
0 , < 2.75.1
(semver)
|
|||
| Canonical | Ubuntu 16.04 LTS |
Unaffected:
2.61.4ubuntu0.16.04.1+esm2 , < *
(dpkg)
|
|
| Canonical | Ubuntu 18.04 LTS |
Unaffected:
2.61.4ubuntu0.18.04.1+esm2 , < *
(dpkg)
|
|
| Canonical | Ubuntu 20.04 LTS |
Unaffected:
2.67.1+20.04ubuntu1~esm1 , < *
(dpkg)
|
|
| Canonical | Ubuntu 22.04 LTS |
Unaffected:
2.73+ubuntu22.04.1 , < *
(dpkg)
|
|
| Canonical | Ubuntu 24.04 LTS |
Unaffected:
2.73+ubuntu24.04.2 , < *
(dpkg)
|
Date Public
2026-03-17 14:00
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CVE-2026-8933 (GCVE-0-2026-8933)
Vulnerability from cvelistv5 – Published: 2026-07-21 14:02 – Updated: 2026-07-22 18:28
VLAI
EPSS
VEX
Title
snap-confine Local Privilege Escalation via Capabilities Misconfiguration or Flaw in Execution Environment Setup
Summary
A local privilege escalation vulnerability exists in snap-confine, a set-capabilities core component used internally by Canonical snapd to construct the secure execution environment for snap applications. This vulnerability uniquely affects versions of snap-confine configured with set-capabilities (rather than standard set-uid-root installations).
Due to a flaw in how privilege boundaries or security sandboxes are initialized when the binary runs under limited ambient capabilities, a local, unprivileged attacker can exploit this behavior to bypass intended restrictions and execute arbitrary code. Successful exploitation allows the local user to elevate their privileges to full root authority.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-22 18:15 UTC
CWE
- CWE-250 - Execution with unnecessary privileges
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://ubuntu.com/security/CVE-2026-8933 | vdb-entryissue-tracking |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
|
Affected:
2.75.0 , < 2.76.1
(semver)
|
|||
| Canonical | Ubuntu 26.04 LTS |
Unaffected:
2.76+ubuntu26.04.3
(dpkg)
|
|
| Canonical | Ubuntu 24.04 LTS |
Unaffected:
2.76+ubuntu24.04.1
(dpkg)
|
|
| Canonical | Ubuntu 22.04 LTS |
Unaffected:
2.76+ubuntu22.04.1
(dpkg)
|
Date Public
2026-07-21 02:00
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CVE-2026-15226 (GCVE-0-2026-15226)
Vulnerability from cvelistv5 – Published: 2026-07-21 14:02 – Updated: 2026-07-22 18:28
VLAI
EPSS
VEX
Title
snapd snap-confine Sandbox Confinement Bypass via Omission of setuid Restriction in Seccomp Templates
Summary
A sandbox confinement bypass vulnerability exists in Canonical snapd within its internal execution environment compiler (snap-confine). The default seccomp security templates generated by the engine to restrict system calls do not filter or reject process operations capable of creating or manipulating file execution flags with set-user-ID attributes. Consequently, an application running within a strictly confined snap environment can successfully compile or drop binaries and apply setuid properties to them. If a compromised or malicious process inside the snap sandbox executes these generated setuid binaries, it can potentially circumvent architectural sandboxing assumptions, drop intended restriction policies, or execute privileged actions inside the container namespace that should otherwise be strictly blocked. The vulnerability has been resolved by hardening the seccomp template engine to block the execution and creation of setuid executables by sandboxed snap processes.
Severity
8.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-22 18:15 UTC
CWE
- CWE-250 - Execution with unnecessary privileges
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://ubuntu.com/security/CVE-2026-15226 | vdb-entryissue-tracking |
Impacted products
7 products
| Vendor | Product | Version | |
|---|---|---|---|
|
Affected:
0 , < 2.76.1
(semver)
|
|||
| Canonical | Ubuntu 26.04 LTS |
Unaffected:
2.76+ubuntu26.04.3
(dpkg)
|
|
| Canonical | Ubuntu 24.04 LTS |
Unaffected:
2.76+ubuntu24.04.1
(dpkg)
|
|
| Canonical | Ubuntu 22.04 LTS |
Unaffected:
2.76+ubuntu22.04.1
(dpkg)
|
|
| Canonical | Ubuntu 20.04 LTS |
Unaffected:
2.67.1+20.04ubuntu1~esm2
(dpkg)
|
|
| Canonical | Ubuntu 18.04 LTS |
Unaffected:
2.61.4ubuntu0.18.04.1+esm3
(dpkg)
|
|
| Canonical | Ubuntu 16.04 LTS |
Unaffected:
2.61.4ubuntu0.16.04.1+esm3
|
Date Public
2026-07-21 14:00
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CVE-2024-5300 (GCVE-0-2024-5300)
Vulnerability from cvelistv5 – Published: 2026-07-21 14:00 – Updated: 2026-07-22 18:28
VLAI
EPSS
VEX
Title
AppArmor Base Profile Misconfiguration in snapd Permits Confined Snaps Unauthorized Access to Hashed Passwords via systemd-userdbd
Summary
An access control bypass and information disclosure vulnerability exists in the base AppArmor security profile configuration of Canonical snapd. The abstraction rules located in /etc/apparmor.d/abstractions/nss-systemd (inherited via ) inadvertently permit strictly confined snap applications, which lack the privileged account-control interface, to interact directly with the io.systemd.Multiplexer and io.systemd.NameServiceSwitch UNIX domain sockets under /run/systemd/userdb/.
On systems where the systemd-userdbd service is installed and operational, the service fails to distinguish between an unconfined root user on the host system and a restricted root user running within a snap application's sandbox (such as a daemon or configuration hook). Because systemd-userdbd returns "complete" user records—including sensitive hashed user passwords from /etc/shadow—when queried by a process running as root, a compromised or malicious strictly confined snap executing code as root can successfully query the Varlink interface to retrieve all system password hashes, bypassing intended snap sandbox restrictions. This issue is mitigated by the fact that systemd-userdbd is not installed by default on standard Ubuntu deployments.
Severity
5.6 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-22 18:13 UTC
CWE
- CWE-212 - Improper removal of sensitive information before storage or transfer
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://ubuntu.com/security/CVE-2024-5300 | vdb-entryissue-tracking |
Impacted products
7 products
| Vendor | Product | Version | |
|---|---|---|---|
|
Affected:
0 , < 2.76.1
(semver)
|
|||
| Canonical | Ubuntu 26.04 LTS |
Unaffected:
2.76+ubuntu26.04.3
(dpkg)
|
|
| Canonical | Ubuntu 24.04 LTS |
Unaffected:
2.76+ubuntu24.04.1
(dpkg)
|
|
| Canonical | Ubuntu 22.04 LTS |
Unaffected:
2.76+ubuntu22.04.1
(dpkg)
|
|
| Canonical | Ubuntu 20.04 LTS |
Unaffected:
2.67.1+20.04ubuntu1~esm2
(dpkg)
|
|
| Canonical | Ubuntu 18.04 LTS |
Unaffected:
2.61.4ubuntu0.18.04.1+esm3
(dpkg)
|
|
| Canonical | Ubuntu 16.04 LTS |
Unaffected:
2.61.4ubuntu0.16.04.1+esm3
|
Date Public
2026-07-21 14:00
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CVE-2026-12391 (GCVE-0-2026-12391)
Vulnerability from cvelistv5 – Published: 2026-07-16 12:17 – Updated: 2026-07-16 13:28
VLAI
EPSS
VEX
Title
ubuntu-pro-client Local Privilege Escalation and Information Disclosure via Symlink Arbitrary File Read in collect-logs
Summary
An insecure symlink following vulnerability exists in Canonical ubuntu-pro-client (formerly ubuntu-advantage-tools) within the pro collect-logs command framework. The utility creates or utilizes predictable temporary file paths or user-accessible log directories when gathering diagnostic information without verifying the file type or ownership. An unprivileged local attacker can exploit this behavior by creating a symbolic link (symlink) at a predictable destination path pointing to an arbitrary, root-readable file (such as /etc/shadow or private files within /root). When a root administrator or operator subsequently executes the pro collect-logs command, the tool follows the user-controlled symlink, reads the target file, and compresses its contents into the resulting diagnostic support archive. Because the output archive remains readable by the unprivileged user, the attacker can extract and read the sensitive root-owned files, leading to a complete information disclosure of system secrets.
Severity
5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-16 13:20 UTC
CWE
- CWE-59 - Improper link resolution before file access ('link following')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://ubuntu.com/security/CVE-2026-12391 | vdb-entry |
Impacted products
7 products
| Vendor | Product | Version | |
|---|---|---|---|
| Canonical | ubuntu-pro-client (ubuntu-advantage-tools) |
Affected:
0 , < 37.3
(python)
|
|
| Canonical | Ubuntu 26.04 LTS |
Unaffected:
37.2ubuntu0.1
(dpkg)
|
|
| Canonical | Ubuntu 24.04 LTS |
Unaffected:
37.2ubuntu~24.04.1
(dpkg)
|
|
| Canonical | Ubuntu 22.04 LTS |
Unaffected:
37.2ubuntu~22.04.1
(dpkg)
|
|
| Canonical | Ubuntu 20.04 LTS |
Unaffected:
37.1ubuntu0~20.04.1
(dpkg)
|
|
| Canonical | Ubuntu 18.04 LTS |
Unaffected:
37.1ubuntu0~18.04.1
(dpkg)
|
|
| Canonical | Ubuntu 16.04 LTS |
Unaffected:
37.1ubuntu0~16.04.1
(dpkg)
|
Date Public
2026-07-16 12:00
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CVE-2026-11386 (GCVE-0-2026-11386)
Vulnerability from cvelistv5 – Published: 2026-07-16 12:16 – Updated: 2026-07-16 13:31
VLAI
EPSS
VEX
Title
ubuntu-pro-client Input Validation Vulnerability Leading to Arbitrary APT Directive Injection and Remote Code Execution
Summary
An input validation and injection vulnerability exists in Canonical ubuntu-pro-client (formerly ubuntu-advantage-tools). The client constructs APT source files (such as /etc/apt/sources.list.d/ubuntu-.list or their DEB822 equivalents) using data received directly from the contract server response via the directives.suites[] and directives.aptURL fields. Because the client utilizes Python's str.format() to write these files without performing escaping, validation, or newline character filtering, a malicious or tampered contract response containing embedded newline (\n) characters can successfully inject arbitrary, attacker-controlled deb configuration lines into root-owned APT sources. When combined with the unvalidated additionalPackages[] field—which is passed positionally into a root-executed apt-get install command—an attacker capable of spoofing or manipulating the contract response (e.g., via a compromised internal infrastructure, an intercepted connection utilizing a trusted CA, or local logical bugs) can force the client to fetch and install malicious packages. This ultimately leads to arbitrary code execution with root privileges on the affected system. This component is preinstalled on supported Ubuntu Server releases and auto-attaches by default on cloud provider Ubuntu Pro images.
Severity
9 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-16 13:30 UTC
CWE
- CWE-20 - Improper input validation
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://ubuntu.com/security/CVE-2026-11386 | vdb-entry |
Impacted products
8 products
| Vendor | Product | Version | |
|---|---|---|---|
| Canonical | ubuntu-pro-client (ubuntu-advantage-tools) |
Affected:
0 , < 37.3
(python)
|
|
| Canonical | Ubuntu 26.04 LTS |
Unaffected:
37.2ubuntu0.1
(dpkg)
|
|
| Canonical | Ubuntu 24.04 LTS |
Unaffected:
37.2ubuntu~24.04.1
(dpkg)
|
|
| Canonical | Ubuntu 22.04 LTS |
Unaffected:
37.2ubuntu~22.04.1
(dpkg)
|
|
| Canonical | Ubuntu 20.04 LTS |
Unaffected:
37.1ubuntu0~20.04.1
(dpkg)
|
|
| Canonical | Ubuntu 18.04 LTS |
Unaffected:
37.1ubuntu0~18.04.1
(dpkg)
|
|
| Canonical | Ubuntu 16.04 LTS |
Unaffected:
37.1ubuntu0~16.04.1
(dpkg)
|
|
| Canonical | Ubuntu 14.04 LTS |
Unaffected:
19.7ubuntu0.1
(dpkg)
|
Date Public
2026-07-16 12:00
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CVE-2026-9494 (GCVE-0-2026-9494)
Vulnerability from cvelistv5 – Published: 2026-07-16 12:12 – Updated: 2026-07-16 15:11
VLAI
EPSS
VEX
Title
ubuntu-pro-client Information Disclosure via Cleartext Bearer Token Exposure in Process Command Line
Summary
An information disclosure vulnerability exists in Canonical ubuntu-pro-client (formerly ubuntu-advantage-tools). The client validates Ubuntu Pro APT credentials by executing /usr/lib/apt/apt-helper using the download-file command. During this process, the secret bearer token is embedded directly in
the cleartext URL component passed via the command-line arguments (argv), resulting in a URL format such as https://bearer:<token>@esm.ubuntu.com/.../. On systems utilizing a default-mounted /proc file system where process-hiding mitigations (such as hidepid) are disabled, an unprivileged local attacker can
monitor system processes and read the sensitive bearer token directly from /proc/cmdline while the helper process is actively running. This leaked token can subsequently be used to gain unauthorized access to the victim's Ubuntu Pro or Expanded Security Maintenance (ESM) repositories.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-16 13:36 UTC
CWE
- CWE-214 - Invocation of process using visible sensitive information
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://ubuntu.com/security/CVE-2026-9494 | vdb-entry |
Impacted products
8 products
| Vendor | Product | Version | |
|---|---|---|---|
| Canonical | ubuntu-pro-client (ubuntu-advantage-tools) |
Affected:
0 , < 37.3
(python)
|
|
| Canonical | Ubuntu 26.04 LTS |
Unaffected:
37.2ubuntu0.1
(dpkg)
|
|
| Canonical | Ubuntu 24.04 LTS |
Unaffected:
37.2ubuntu~24.04.1
(dpkg)
|
|
| Canonical | Ubuntu 22.04 LTS |
Unaffected:
37.2ubuntu~22.04.1
(dpkg)
|
|
| Canonical | Ubuntu 20.04 LTS |
Unaffected:
37.1ubuntu0~20.04.1
(dpkg)
|
|
| Canonical | Ubuntu 18.04 LTS |
Unaffected:
37.1ubuntu0~18.04.1
(dpkg)
|
|
| Canonical | Ubuntu 16.04 LTS |
Unaffected:
37.1ubuntu0~16.04.1
(dpkg)
|
|
| Canonical | Ubuntu 14.04 LTS |
Unaffected:
19.7ubuntu0.1
(dpkg)
|
Date Public
2026-07-16 12:00
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CVE-2026-12249 (GCVE-0-2026-12249)
Vulnerability from cvelistv5 – Published: 2026-06-22 15:43 – Updated: 2026-06-22 17:30
VLAI
EPSS
VEX
Title
Canonical ADSys Trust Store Poisoning via Plaintext HTTP Certificate Auto-Enrollment
Summary
An issue was discovered in Canonical ADSys upstream versions through v0.16.2. During Active Directory Certificate Services (AD CS) certificate auto-enrollment via the vendored Samba client script (internal/policies/certificate/python/vendor_samba/gp/gp_cert_auto_enroll_ext.py), ADSys utilizes a plaintext HTTP connection (http://) instead of a secure HTTPS connection (https://) to request the CA certificate from the Active Directory Certificate Services server (GetCACert). An unauthenticated network attacker positioned between the managed Ubuntu host and the configured AD CS CA hostname can conduct a Man-in-the-Middle (MITM) attack. By intercepting the plaintext HTTP request, the attacker can supply an arbitrary, attacker-controlled Root CA certificate. Because the system automatically accepts this certificate and registers it into the local system trust store via update-ca-certificates, this results in system-wide trust store poisoning. Consequently, TLS clients utilizing the operating system trust store on the affected machine will accept rogue certificates for arbitrary domains, enabling persistent decryption and interception of subsequent TLS connections. This issue is resolved in version v0.16.3.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-22 17:30 UTC
CWE
- CWE-348 - Improper verification of cryptographic signature
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://ubuntu.com/security/CVE-2026-12249 | vdb-entryissue-tracking |
| https://github.com/ubuntu/adsys/commit/8b1939f96d… | patch |
Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
|
Affected:
0.13.0 , < 0.16.3
(semver)
|
|||
| Canonical | Ubuntu 20.04 LTS |
Unaffected:
0.9.2~20.04.2ubuntu0.1+esm2
(dpkg)
|
|
| Canonical | Ubuntu 22.04 LTS |
Unaffected:
0.16.3~22.04.2ubuntu0.22.04.1
(dpkg)
|
|
| Canonical | Ubuntu 24.04 LTS |
Unaffected:
0.16.3~24.04.2ubuntu0.24.04.1
(dpkg)
|
|
| Canonical | Ubuntu 25.10 |
Unaffected:
0.16.3
(dpkg)
|
|
| Canonical | Ubuntu 26.04 LTS |
Unaffected:
0.16.4ubuntu1
(dpkg)
|
Date Public
2026-06-19 11:58
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CVE-2026-3888 (GCVE-0-2026-3888)
Vulnerability from cvelistv5 – Published: 2026-03-17 14:02 – Updated: 2026-03-18 08:59
VLAI
EPSS
VEX
Title
Local Privilege Escalation in snapd
Summary
Local privilege escalation in snapd on Linux allows local attackers to get root privilege by re-creating snap's private /tmp directory when systemd-tmpfiles is configured to automatically clean up this directory. This issue affects Ubuntu 16.04 LTS, 18.04 LTS, 20.04 LTS, 22.04 LTS, and 24.04 LTS.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-17 00:00 UTC
CWE
- CWE-268 - Privilege chaining
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://ubuntu.com/security/CVE-2026-3888 | vdb-entryissue-tracking |
| https://ubuntu.com/security/notices/USN-8102-1 | vendor-advisory |
| https://discourse.ubuntu.com/t/snapd-local-privil… | technical-descriptionvendor-advisory |
| https://blog.qualys.com/vulnerabilities-threat-re… | technical-descriptionmedia-coverage |
| https://cdn2.qualys.com/advisory/2026/03/17/snap-… | technical-descriptionmedia-coverage |
| http://www.openwall.com/lists/oss-security/2026/03/18/1 |
Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
|
Affected:
0 , < 2.75.1
(semver)
|
|||
| Canonical | Ubuntu 16.04 LTS |
Unaffected:
2.61.4ubuntu0.16.04.1+esm2 , < *
(dpkg)
|
|
| Canonical | Ubuntu 18.04 LTS |
Unaffected:
2.61.4ubuntu0.18.04.1+esm2 , < *
(dpkg)
|
|
| Canonical | Ubuntu 20.04 LTS |
Unaffected:
2.67.1+20.04ubuntu1~esm1 , < *
(dpkg)
|
|
| Canonical | Ubuntu 22.04 LTS |
Unaffected:
2.73+ubuntu22.04.1 , < *
(dpkg)
|
|
| Canonical | Ubuntu 24.04 LTS |
Unaffected:
2.73+ubuntu24.04.2 , < *
(dpkg)
|
Date Public
2026-03-17 14:00
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