CVE reports

The Common Vulnerabilities and Exposures (CVE) system is used to identify, define, and catalog publicly disclosed cybersecurity vulnerabilities. Canonical keeps track of all CVEs affecting Ubuntu, and releases a security notice when an issue is fixed. You can find additional guidance for high-profile vulnerabilities in the Ubuntu Vulnerability Knowledge Base section

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Recent CVEs

CVE-2026-123158

High priority
Needs evaluation

sshd in OpenSSH before 10.6p2 on Linux, when musl libc is used without PAM, lacks a workaround for a password authentication bypass (related to misinterpretation of whether a string is intended to be a password hash). For some...

3 affected packages

openssh, openssh-ssh1, openssh-gssapi

CVE-2026-109518

High priority
Fixed

On Debian, Ubuntu, and derivative Linux distributions, an on-path attacker who can manipulate the HTTP traffic (including a malicious mirror or proxy) between an APT client and an archive server triggered by a package install can...

1 affected package

apt

CVE-2026-111497

High priority

Some fixes available 13 of 16

A buffer overflow vulnerability in the Brotli decoder (c/dec/decode.c) in Google Brotli versions 1.0.3 through 1.2.0 on all platforms allows a remote unauthenticated attacker to corrupt adjacent decoder state memory,...

7 affected packages

brotli, nodejs, dotnet6, dotnet7, dotnet8...

CVE-2026-93336

High priority

Not in release

Missing authorization in the unit resources download route in Canonical Juju 4.0 through 4.0.15 allows a controller-authenticated principal (a unit agent, or a user with only login permission) to read any application's charm...

1 affected package

juju

CVE-2026-98866

High priority
Ignored

In the Linux kernel, the following vulnerability has been resolved: sched/cache: Introduce task_struct->sched_cache_grp to fix UAF Add a sched_cache_grp pointer to task_struct so that scheduler code can access the cache group...

169 affected packages

linux, linux-hwe, linux-hwe-5.4, linux-hwe-5.8, linux-hwe-5.11...

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