Canonical: Security Vulnerabilities
PDFunite 0.41.0 contains a buffer overflow vulnerability that allows local attackers to crash the application by processing malformed PDF files during merge operations. Attackers can trigger a segmentation fault in the XRef::getEntry function within libpoppler by providing a specially crafted PDF file to the pdfunite utility.
CVSS Score
6.9
EPSS Score
0.0
Published
2026-04-29
CVE-2026-31431
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.
Known exploited
CVSS Score
7.8
EPSS Score
0.012
Published
2026-04-22
Improper synchronization of the userTokens map in the API server in Canonical Juju 4.0.5, 3.6.20, and 2.9.56 may allow an authenticated user to possibly cause a denial of service on the server or possibly reuse a single-use discharge token.
CVSS Score
6.0
EPSS Score
0.0
Published
2026-04-10
In Juju versions prior to 2.9.57 and 3.6.21, an authorization issue exists in the Controller facade. An authenticated user can call the CloudSpec API method to extract the cloud credentials used to bootstrap the controller. This allows a low-privileged user to access sensitive credentials. This issue is resolved in Juju versions 2.9.57 and 3.6.21.
CVSS Score
9.9
EPSS Score
0.0
Published
2026-04-10
In Ubuntu, ubuntu-desktop-provision version 24.04.4 could leak sensitive user credentials during crash reporting. Upon installation failure, if a user submitted a bug report to Launchpad, ubuntu-desktop-provision could include the user's password hash in the attached logs.
CVSS Score
2.7
EPSS Score
0.001
Published
2026-04-09
In Ubuntu, Subiquity version 24.04.4 could leak sensitive user credentials during crash reporting. Upon installation failure, if a user submitted a bug report to Launchpad, Subiquity could include certain user credentials, such as the user's plaintext Wi-Fi password, in the attached logs.
CVSS Score
2.7
EPSS Score
0.0
Published
2026-04-09
Canonical LXD versions 4.12 through 6.7 contain an incomplete denylist in isVMLowLevelOptionForbidden (lxd/project/limits/permissions.go), which omits raw.apparmor and raw.qemu.conf from the set of keys blocked under the restricted.virtual-machines.lowlevel=block project restriction. A remote attacker with can_edit permission on a VM instance in a restricted project can inject an AppArmor rule and a QEMU chardev configuration that bridges the LXD Unix socket into the guest VM, enabling privilege escalation to LXD cluster administrator and subsequently to host root.
CVSS Score
9.1
EPSS Score
0.001
Published
2026-04-09
In Canonical LXD before 6.8, the backup import path validates project restrictions against backup/index.yaml in the supplied tar archive but creates the instance from backup/container/backup.yaml, a separate file in the same archive that is never checked against project restrictions. An authenticated remote attacker with instance-creation permission in a restricted project can craft a backup archive where backup.yaml carries restricted settings such as security.privileged=true or raw.lxc directives, bypassing all project restriction enforcement and allowing full host compromise.
CVSS Score
9.1
EPSS Score
0.0
Published
2026-04-09
In Canonical LXD versions 4.12 through 6.7, the doCertificateUpdate function in lxd/certificates.go does not validate the Type field when handling PUT/PATCH requests to /1.0/certificates/{fingerprint} for restricted TLS certificate users, allowing a remote authenticated attacker to escalate privileges to cluster admin.
CVSS Score
9.1
EPSS Score
0.001
Published
2026-04-09
Juju is an open source application orchestration engine that enables any application operation on any infrastructure at any scale through special operators called ‘charms’. From versions 2.9 to before 2.9.56 and 3.6 to before 3.6.19, it is possible that a compromised workload machine under a Juju controller can read any log file for any entity in any model at any level. This issue has been patched in versions 2.9.56 and 3.6.19.
CVSS Score
6.9
EPSS Score
0.0
Published
2026-04-03
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