Ubuntu 23.04 'Lunar Lobster'
Ubuntu 23.04 'Lunar Lobster'
The Ubuntu 23.04 'Lunar Lobster' reached end of service life on Jan 20, 2024 — Ubuntu no longer ships security patches or fixes for it. Our third-party support keeps it safe to run: 24/7 engineers manage issues, remediate vulnerabilities, and help you maintain compliance.
24/7 engineers own your Ubuntu 23.04 'Lunar Lobster' incidents end to end.
Mitigation and patch-around guidance when the vendor no longer ships fixes.
Controls evidence and documentation that keep auditors satisfied.
Specifications
- product
- ubuntu
- release
- 23.04
- product Label
- Ubuntu
- release Label
- 23.04 'Lunar Lobster'
- codename
- Lunar Lobster
- lts
- latest Version
- 23.04
- release Date
- 2023-04-20
- maintained
- source Url
- https://endoflife.date/ubuntu
Lifecycle Dates
- End of Service Life
- Jan 20, 2024
- Last OEM Support
- Jan 20, 2024
OEM vs. 3rd Party Support
See how third-party support compares to the vendor contract for Ubuntu 23.04 'Lunar Lobster' — monitoring, break/fix, vulnerability work, operations and compliance, before and after EOSL.
| Feature | OEM Support | 3rd Party Support |
|---|---|---|
| Post-EOSL Support | ||
| Break/Fix Support | Until EOSL | |
| 24/7 Monitoring | ||
| Vulnerability Scanning & Remediation | ||
| Managed Operations | ||
| Procedure & Configuration Review | ||
| Compliance & Audit Documentation | Limited | |
| Discounted Migration to Other Platforms |
Why Choose 3rd Party Support for Ubuntu 23.04 'Lunar Lobster'?
Vulnerability Remediation
Scanning, mitigation and patch-around guidance for Ubuntu 23.04 'Lunar Lobster' when the vendor no longer ships fixes.
Compliance Maintenance
Procedure review, controls evidence and the documentation auditors ask for — maintained continuously, not scrambled at audit time.
24/7 Expert Support
Engineers who know this release monitor, manage and fix issues around the clock — break/fix to managed operations.
Ubuntu 23.04 'Lunar Lobster' Support: Frequently Asked Questions
Is the Ubuntu 23.04 'Lunar Lobster' still supported?
Ubuntu ended support for the Ubuntu 23.04 'Lunar Lobster' on Jan 20, 2024 — no more patches or fixes from the vendor. Third-party support keeps it covered: our engineers manage issues, remediate vulnerabilities, and help you maintain compliance for as long as you run it.
When is the Ubuntu 23.04 'Lunar Lobster' end of service life (EOSL) date?
Ubuntu lists the end of service life for the Ubuntu 23.04 'Lunar Lobster' as Jan 20, 2024.
Can I keep using the Ubuntu 23.04 'Lunar Lobster' after its EOSL date?
Yes. EOSL means Ubuntu stops issuing patches and support — the software itself keeps running. Third-party support covers it from there: issue management, security vulnerability remediation, and the compliance documentation auditors ask for, for as long as you choose to run it.
How much does third-party support for the Ubuntu 23.04 'Lunar Lobster' cost?
Typically 40-70% below the OEM maintenance renewal price. Exact pricing depends on quantity, service level and location — request a quote and we respond within 24 hours.
Known Vulnerabilities Affecting Ubuntu 23.04 'Lunar Lobster'
10 published CVEs affect the Ubuntu 23.04 'Lunar Lobster', including 7 rated critical or high severity. Ubuntu no longer ships security patches for this release — our engineers provide mitigation guidance, workarounds and hardening support.
| CVE | Severity | CVSS | Published | Summary |
|---|---|---|---|---|
| CVE-2023-1523 | CRITICAL | 10.0 | Sep 1, 2023 | Using the TIOCLINUX ioctl request, a malicious snap could inject contents into the input of the controlling terminal which could allow it to cause arbitrary commands to be executed outside of the snap sandbox after the snap exits. Graphical terminal emulators like xterm, gnome-terminal and others are not affected - this can only be exploited when snaps are run on a virtual console. |
| CVE-2024-6387 | HIGH | 8.1 | Jul 1, 2024 | A security regression (CVE-2006-5051) was discovered in OpenSSH's server (sshd). There is a race condition which can lead sshd to handle some signals in an unsafe manner. An unauthenticated, remote attacker may be able to trigger it by failing to authenticate within a set time period. |
| CVE-2023-3297 | HIGH | 8.1 | Sep 1, 2023 | In Ubuntu's accountsservice an unprivileged local attacker can trigger a use-after-free vulnerability in accountsservice by sending a D-Bus message to the accounts-daemon process. |
| CVE-2026-31431 | HIGH | 7.8 | Apr 22, 2026 | In the Linux kernel, the following vulnerability has been resolved: crypto: algif_aead - Revert to operating out-of-place This mostly reverts commit 72548b093ee3 except for the copying of the associated data. There is no benefit in operating in-place in algif_aead since the source and destination come from different mappings. Get rid of all the complexity added for in-place operation and just copy the AD directly. |
| CVE-2023-4911 | HIGH | 7.8 | Oct 3, 2023 | A buffer overflow was discovered in the GNU C Library's dynamic loader ld.so while processing the GLIBC_TUNABLES environment variable. This issue could allow a local attacker to use maliciously crafted GLIBC_TUNABLES environment variables when launching binaries with SUID permission to execute code with elevated privileges. |
| CVE-2023-32629 | HIGH | 7.8 | Jul 26, 2023 | Local privilege escalation vulnerability in Ubuntu Kernels overlayfs ovl_copy_up_meta_inode_data skip permission checks when calling ovl_do_setxattr on Ubuntu kernels |
| CVE-2023-2640 | HIGH | 7.8 | Jul 26, 2023 | On Ubuntu kernels carrying both c914c0e27eb0 and "UBUNTU: SAUCE: overlayfs: Skip permission checking for trusted.overlayfs.* xattrs", an unprivileged user may set privileged extended attributes on the mounted files, leading them to be set on the upper files without the appropriate security checks. |
| CVE-2023-1786 | MEDIUM | 5.5 | Apr 26, 2023 | Sensitive data could be exposed in logs of cloud-init before version 23.1.2. An attacker could use this information to find hashed passwords and possibly escalate their privilege. |
| CVE-2023-5536 | MEDIUM | 5.0 | Dec 12, 2023 | A feature in LXD (LP#1829071), affects the default configuration of Ubuntu Server which allows privileged users in the lxd group to escalate their privilege to root without requiring a sudo password. |
| CVE-2023-5616 | MEDIUM | 4.9 | Apr 15, 2025 | In Ubuntu, gnome-control-center did not properly reflect SSH remote login status when the system was configured to use systemd socket activation for openssh-server. This could unknowingly leave the local machine exposed to remote SSH access contrary to expectation of the user. |