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Canonical Ubuntu Linux vulnerabilities

4,104 published CVES affecting Canonical Ubuntu Linux, from public sources (CVE.org, NVD, CISA KEV, FIRST EPSS, OSV).

Total
4,104
Critical
342
High
1,604
Medium
1,937
Low
221
Unscored
0
CISA KEV
47

Latest Canonical Ubuntu Linux CVEs

Newest publication first · page 1 of 40 · showing the latest 1,000

  1. HighCVSS 7.8 EPSS 0.11%

    Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which can potentially incorrectly compute the size of an internal buffer, leading to a heap memory out-of-bounds read in notification handling code. The bug can be triggered by an unprivileged local user and can result...

  2. MediumCVSS 5.5 EPSS 0.11%

    Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly validate the size of an internal structure, leading to an out-of-bounds read in notification handling code. The bug can be triggered by an unprivileged local user and can result in information disclos...

  3. HighCVSS 7.8 EPSS 98.1% CISA KEV added 2026-05-01 Exploited in the wild Framework module

    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 sourc...

  4. HighCVSS 7.8 EPSS 1.4% Framework module

    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 LT...

  5. MediumCVSS 4.7 EPSS 0.78%

    Race condition in Canonical apport up to and including 2.32.0 allows a local attacker to leak sensitive information via PID-reuse by leveraging namespaces. When handling a crash, the function _check_global_pid_and_forward, which detects if the crashing process resided in a contai...

  6. MediumCVSS 4.9 EPSS 0.24%

    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.

  7. MediumCVSS 5.9 EPSS 38.7%

    A flaw was found in the OpenSSH package. For each ping packet the SSH server receives, a pong packet is allocated in a memory buffer and stored in a queue of packages. It is only freed when the server/client key exchange has finished. A malicious client may keep sending such pack...

  8. HighCVSS 8.1 EPSS 99.5%

    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 pe...

  9. HighCVSS 8.8 EPSS 0.26%

    When generating the systemd service units for the docker snap (and other similar snaps), snapd does not specify Delegate=yes - as a result systemd will move processes from the containers created and managed by these snaps into the cgroup of the main daemon within the snap itself...

Sources: CVE.org, NVD, CISA KEV, FIRST EPSS, OSV and public exploit-reference metadata. Product matching comes from the published CVE records. A proof-of-concept means public code exists; it is not evidence of exploitation.