[USN-8449-1] ldns vulnerability
[USN-8450-1] Tomcat vulnerabilities
[USN-8454-1] libheif vulnerabilities
[USN-8451-1] Vim vulnerabilities
[USN-8453-1] Net::CIDR::Lite vulnerabilities
[USN-8447-2] LXD vulnerabilities
[USN-8449-1] ldns vulnerability
==========================================================================
Ubuntu Security Notice USN-8449-1
June 18, 2026
ldns vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 26.04 LTS
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
Summary:
ldns could be made to accept spoofed DNS responses.
Software Description:
- ldns: ldns library for DNS programming
Details:
Pablo Ruiz discovered that ldns did not properly validate DNS
responses when used as a stub resolver over UDP. A remote
attacker could possibly use this issue to inject arbitrary DNS
responses.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 26.04 LTS
ldnsutils 1.8.4-2ubuntu0.26.04.1~esm1
Available with Ubuntu Pro
libldns3t64 1.8.4-2ubuntu0.26.04.1~esm1
Available with Ubuntu Pro
Ubuntu 24.04 LTS
ldnsutils 1.8.3-2ubuntu0.1~esm1
Available with Ubuntu Pro
libldns3t64 1.8.3-2ubuntu0.1~esm1
Available with Ubuntu Pro
Ubuntu 22.04 LTS
ldnsutils 1.7.1-2ubuntu4+esm2
Available with Ubuntu Pro
libldns3 1.7.1-2ubuntu4+esm2
Available with Ubuntu Pro
Ubuntu 20.04 LTS
ldnsutils 1.7.0-4.1ubuntu1+esm2
Available with Ubuntu Pro
libldns2 1.7.0-4.1ubuntu1+esm2
Available with Ubuntu Pro
Ubuntu 18.04 LTS
ldnsutils 1.7.0-3ubuntu4.1+esm1
Available with Ubuntu Pro
libldns2 1.7.0-3ubuntu4.1+esm1
Available with Ubuntu Pro
Ubuntu 16.04 LTS
ldnsutils 1.6.17-8ubuntu0.1+esm2
Available with Ubuntu Pro
libldns1 1.6.17-8ubuntu0.1+esm2
Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-8449-1
CVE-2026-10846
[USN-8450-1] Tomcat vulnerabilities
==========================================================================
Ubuntu Security Notice USN-8450-1
June 18, 2026
tomcat11 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 26.04 LTS
Summary:
Several security issues were fixed in Tomcat.
Software Description:
- tomcat11: Servlet and JSP engine
Details:
It was discovered that Tomcat did not properly limit the size of
WebDAV LOCK and PROPFIND request bodies. A remote attacker could
possibly use this issue to cause Tomcat to consume excessive memory,
resulting in a denial of service. (CVE-2026-41284)
It was discovered that Tomcat incorrectly validated HTTP/2 header
fields. A remote attacker could use this issue to cause Tomcat to
crash or possibly execute arbitrary code. (CVE-2026-41293)
It was discovered that Tomcat did not properly clear HTTP
authentication headers during WebSocket connection upgrades and
redirects. A remote attacker could possibly use this issue to obtain
sensitive credentials. (CVE-2026-42498)
It was discovered that Tomcat incorrectly handled authorization
when multiple method constraints defined the same HTTP method. A
remote attacker could possibly use this issue to bypass
authorization restrictions. (CVE-2026-43515)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 26.04 LTS
libtomcat11-embed-java 11.0.18-1ubuntu0.1~esm1
Available with Ubuntu Pro
libtomcat11-java 11.0.18-1ubuntu0.1~esm1
Available with Ubuntu Pro
tomcat11 11.0.18-1ubuntu0.1~esm1
Available with Ubuntu Pro
After a standard system update you need to restart Tomcat to make
all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-8450-1
CVE-2026-41284, CVE-2026-41293, CVE-2026-42498, CVE-2026-43515
[USN-8454-1] libheif vulnerabilities
==========================================================================
Ubuntu Security Notice USN-8454-1
June 18, 2026
libheif vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 26.04 LTS
- Ubuntu 25.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
Summary:
Several security issues were fixed in libheif.
Software Description:
- libheif: An ISO/IEC 23008-12:2017 HEIF and AVIF file format decoder and encoder
Details:
Elhanan Haenel discovered that libheif incorrectly handled certain
malformed HEIF sequence files. An attacker could possibly use this
issue to cause a denial of service. This issue only affected Ubuntu 25.10
and Ubuntu 26.04 LTS. (CVE-2026-32738)
Elhanan Haenel discovered that libheif incorrectly handled certain
malformed HEIF sequence files, leading to an infinite loop. An attacker
could possibly use this issue to cause libheif to use excessive
resources, resulting in a denial of service. This issue only affected
Ubuntu 25.10 and Ubuntu 26.04 LTS. (CVE-2026-32739)
Elhanan Haenel discovered that libheif incorrectly handled certain
crafted HEIF/AVIF image files. An attacker could possibly use this issue
to cause a denial of service or execute arbitrary code. This issue only
affected Ubuntu 25.10 and Ubuntu 26.04 LTS. (CVE-2026-32740)
It was discovered that libheif incorrectly handled certain crafted HEIF
files containing mask images. An attacker could possibly use this issue to
cause a denial of service or execute arbitrary code. This issue only
affected Ubuntu 24.04 LTS, Ubuntu 25.10, and Ubuntu 26.04 LTS.
(CVE-2026-32741)
It was discovered that libheif incorrectly handled certain crafted
grid-based HEIF/AVIF files. An attacker could possibly use this issue to
obtain sensitive information. This issue only affected Ubuntu 20.04 LTS,
Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, Ubuntu 25.10, and Ubuntu 26.04 LTS.
(CVE-2026-32814)
It was discovered that libheif incorrectly handled certain crafted HEIF
files when compositing overlay images. An attacker could possibly use this
issue to cause a denial of service or obtain sensitive information.
(CVE-2026-32882)
It was discovered that libheif incorrectly handled certain crafted
files. An attacker could possibly use this issue to cause a denial of
service. This issue only affected Ubuntu 25.10 and Ubuntu 26.04 LTS.
(CVE-2026-3950)
It was discovered that libheif incorrectly handled certain malformed
HEIF sequence files. An attacker could possibly use this issue to cause a
denial of service. This issue only affected Ubuntu 25.10 and Ubuntu 26.04
LTS. (CVE-2026-41069)
It was discovered that libheif incorrectly handled certain crafted HEIF
sequence files. An attacker could possibly use this issue to cause a denial
of service. This issue only affected Ubuntu 25.10 and Ubuntu 26.04 LTS.
(CVE-2026-41071)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 26.04 LTS
heif-gdk-pixbuf 1.21.2-3ubuntu0.1
heif-thumbnailer 1.21.2-3ubuntu0.1
heif-view 1.21.2-3ubuntu0.1
libheif-dev 1.21.2-3ubuntu0.1
libheif-plugin-aomdec 1.21.2-3ubuntu0.1
libheif-plugin-aomenc 1.21.2-3ubuntu0.1
libheif-plugin-dav1d 1.21.2-3ubuntu0.1
libheif-plugin-ffmpegdec 1.21.2-3ubuntu0.1
libheif-plugin-j2kdec 1.21.2-3ubuntu0.1
libheif-plugin-j2kenc 1.21.2-3ubuntu0.1
libheif-plugin-jpegdec 1.21.2-3ubuntu0.1
libheif-plugin-jpegenc 1.21.2-3ubuntu0.1
libheif-plugin-kvazaar 1.21.2-3ubuntu0.1
libheif-plugin-libde265 1.21.2-3ubuntu0.1
libheif-plugin-rav1e 1.21.2-3ubuntu0.1
libheif-plugin-svtenc 1.21.2-3ubuntu0.1
libheif-plugin-x265 1.21.2-3ubuntu0.1
libheif-plugins-all 1.21.2-3ubuntu0.1
libheif1 1.21.2-3ubuntu0.1
Ubuntu 25.10
heif-gdk-pixbuf 1.20.2-1ubuntu0.4
heif-thumbnailer 1.20.2-1ubuntu0.4
heif-view 1.20.2-1ubuntu0.4
libheif-dev 1.20.2-1ubuntu0.4
libheif-plugin-aomdec 1.20.2-1ubuntu0.4
libheif-plugin-aomenc 1.20.2-1ubuntu0.4
libheif-plugin-dav1d 1.20.2-1ubuntu0.4
libheif-plugin-ffmpegdec 1.20.2-1ubuntu0.4
libheif-plugin-j2kdec 1.20.2-1ubuntu0.4
libheif-plugin-j2kenc 1.20.2-1ubuntu0.4
libheif-plugin-jpegdec 1.20.2-1ubuntu0.4
libheif-plugin-jpegenc 1.20.2-1ubuntu0.4
libheif-plugin-kvazaar 1.20.2-1ubuntu0.4
libheif-plugin-libde265 1.20.2-1ubuntu0.4
libheif-plugin-rav1e 1.20.2-1ubuntu0.4
libheif-plugin-svtenc 1.20.2-1ubuntu0.4
libheif-plugin-x265 1.20.2-1ubuntu0.4
libheif-plugins-all 1.20.2-1ubuntu0.4
libheif1 1.20.2-1ubuntu0.4
Ubuntu 24.04 LTS
heif-gdk-pixbuf 1.17.6-1ubuntu4.4
heif-thumbnailer 1.17.6-1ubuntu4.4
libheif-dev 1.17.6-1ubuntu4.4
libheif-plugin-aomdec 1.17.6-1ubuntu4.4
libheif-plugin-aomenc 1.17.6-1ubuntu4.4
libheif-plugin-dav1d 1.17.6-1ubuntu4.4
libheif-plugin-ffmpegdec 1.17.6-1ubuntu4.4
libheif-plugin-j2kdec 1.17.6-1ubuntu4.4
libheif-plugin-j2kenc 1.17.6-1ubuntu4.4
libheif-plugin-jpegdec 1.17.6-1ubuntu4.4
libheif-plugin-jpegenc 1.17.6-1ubuntu4.4
libheif-plugin-libde265 1.17.6-1ubuntu4.4
libheif-plugin-rav1e 1.17.6-1ubuntu4.4
libheif-plugin-svtenc 1.17.6-1ubuntu4.4
libheif-plugin-x265 1.17.6-1ubuntu4.4
libheif1 1.17.6-1ubuntu4.4
Ubuntu 22.04 LTS
heif-gdk-pixbuf 1.12.0-2ubuntu0.1~esm3
Available with Ubuntu Pro
heif-thumbnailer 1.12.0-2ubuntu0.1~esm3
Available with Ubuntu Pro
libheif-dev 1.12.0-2ubuntu0.1~esm3
Available with Ubuntu Pro
libheif1 1.12.0-2ubuntu0.1~esm3
Available with Ubuntu Pro
Ubuntu 20.04 LTS
heif-gdk-pixbuf 1.6.1-1ubuntu0.1~esm3
Available with Ubuntu Pro
heif-thumbnailer 1.6.1-1ubuntu0.1~esm3
Available with Ubuntu Pro
libheif-dev 1.6.1-1ubuntu0.1~esm3
Available with Ubuntu Pro
libheif1 1.6.1-1ubuntu0.1~esm3
Available with Ubuntu Pro
Ubuntu 18.04 LTS
libheif-dev 1.1.0-2ubuntu0.1~esm3
Available with Ubuntu Pro
libheif1 1.1.0-2ubuntu0.1~esm3
Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-8454-1
CVE-2026-32738, CVE-2026-32739, CVE-2026-32740, CVE-2026-32741,
CVE-2026-32814, CVE-2026-32882, CVE-2026-3950, CVE-2026-41069,
CVE-2026-41071
Package Information:
https://launchpad.net/ubuntu/+source/libheif/1.21.2-3ubuntu0.1
https://launchpad.net/ubuntu/+source/libheif/1.20.2-1ubuntu0.4
https://launchpad.net/ubuntu/+source/libheif/1.17.6-1ubuntu4.4
[USN-8451-1] Vim vulnerabilities
==========================================================================
Ubuntu Security Notice USN-8451-1
June 18, 2026
vim vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 26.04 LTS
- Ubuntu 25.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
Summary:
Several security issues were fixed in Vim.
Software Description:
- vim: Vi IMproved - enhanced vi editor
Details:
Srinivas Piskala Ganesh Babu discovered that Vim incorrectly handled
directory names when serializing browsed paths to the netrw history file.
An attacker could possibly use this issue to execute arbitrary code.
(CVE-2026-47162)
It was discovered that Vim incorrectly handled step-definition patterns in
the cucumber filetype plugin. An attacker could possibly use this issue to
execute arbitrary code. (CVE-2026-47167)
It was discovered that Vim incorrectly handled import statements during
Python omni-completion. An attacker could possibly use this issue to
execute arbitrary code. (CVE-2026-52858)
Andrej Tomči discovered that Vim incorrectly handled certain terminal
screen cells when taking a snapshot, leading to an out-of-bounds read. An
attacker could possibly use this issue to cause Vim to crash, resulting in
a denial of service. (CVE-2026-52859)
David Carliez discovered that Vim incorrectly handled reconstructed
function and class definitions during Python omni-completion. An attacker
could possibly use this issue to execute arbitrary code. (CVE-2026-52860)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 26.04 LTS
vim 2:9.1.2141-1ubuntu4.5
vim-common 2:9.1.2141-1ubuntu4.5
vim-gtk3 2:9.1.2141-1ubuntu4.5
vim-gui-common 2:9.1.2141-1ubuntu4.5
vim-motif 2:9.1.2141-1ubuntu4.5
vim-nox 2:9.1.2141-1ubuntu4.5
vim-runtime 2:9.1.2141-1ubuntu4.5
vim-tiny 2:9.1.2141-1ubuntu4.5
xxd 2:9.1.2141-1ubuntu4.5
Ubuntu 25.10
vim 2:9.1.0967-1ubuntu6.7
vim-athena 2:9.1.0967-1ubuntu6.7
vim-common 2:9.1.0967-1ubuntu6.7
vim-gtk3 2:9.1.0967-1ubuntu6.7
vim-gui-common 2:9.1.0967-1ubuntu6.7
vim-motif 2:9.1.0967-1ubuntu6.7
vim-nox 2:9.1.0967-1ubuntu6.7
vim-runtime 2:9.1.0967-1ubuntu6.7
vim-tiny 2:9.1.0967-1ubuntu6.7
xxd 2:9.1.0967-1ubuntu6.7
Ubuntu 24.04 LTS
vim 2:9.1.0016-1ubuntu7.16
vim-athena 2:9.1.0016-1ubuntu7.16
vim-common 2:9.1.0016-1ubuntu7.16
vim-gtk3 2:9.1.0016-1ubuntu7.16
vim-gui-common 2:9.1.0016-1ubuntu7.16
vim-motif 2:9.1.0016-1ubuntu7.16
vim-nox 2:9.1.0016-1ubuntu7.16
vim-runtime 2:9.1.0016-1ubuntu7.16
vim-tiny 2:9.1.0016-1ubuntu7.16
xxd 2:9.1.0016-1ubuntu7.16
Ubuntu 22.04 LTS
vim 2:8.2.3995-1ubuntu2.32
vim-athena 2:8.2.3995-1ubuntu2.32
vim-common 2:8.2.3995-1ubuntu2.32
vim-gtk 2:8.2.3995-1ubuntu2.32
vim-gtk3 2:8.2.3995-1ubuntu2.32
vim-gui-common 2:8.2.3995-1ubuntu2.32
vim-nox 2:8.2.3995-1ubuntu2.32
vim-runtime 2:8.2.3995-1ubuntu2.32
vim-tiny 2:8.2.3995-1ubuntu2.32
xxd 2:8.2.3995-1ubuntu2.32
Ubuntu 20.04 LTS
vim 2:8.1.2269-1ubuntu5.32+esm8
Available with Ubuntu Pro
vim-athena 2:8.1.2269-1ubuntu5.32+esm8
Available with Ubuntu Pro
vim-common 2:8.1.2269-1ubuntu5.32+esm8
Available with Ubuntu Pro
vim-gtk 2:8.1.2269-1ubuntu5.32+esm8
Available with Ubuntu Pro
vim-gtk3 2:8.1.2269-1ubuntu5.32+esm8
Available with Ubuntu Pro
vim-gui-common 2:8.1.2269-1ubuntu5.32+esm8
Available with Ubuntu Pro
vim-nox 2:8.1.2269-1ubuntu5.32+esm8
Available with Ubuntu Pro
vim-runtime 2:8.1.2269-1ubuntu5.32+esm8
Available with Ubuntu Pro
vim-tiny 2:8.1.2269-1ubuntu5.32+esm8
Available with Ubuntu Pro
xxd 2:8.1.2269-1ubuntu5.32+esm8
Available with Ubuntu Pro
Ubuntu 18.04 LTS
vim 2:8.0.1453-1ubuntu1.13+esm20
Available with Ubuntu Pro
vim-athena 2:8.0.1453-1ubuntu1.13+esm20
Available with Ubuntu Pro
vim-common 2:8.0.1453-1ubuntu1.13+esm20
Available with Ubuntu Pro
vim-gnome 2:8.0.1453-1ubuntu1.13+esm20
Available with Ubuntu Pro
vim-gtk 2:8.0.1453-1ubuntu1.13+esm20
Available with Ubuntu Pro
vim-gtk3 2:8.0.1453-1ubuntu1.13+esm20
Available with Ubuntu Pro
vim-gui-common 2:8.0.1453-1ubuntu1.13+esm20
Available with Ubuntu Pro
vim-nox 2:8.0.1453-1ubuntu1.13+esm20
Available with Ubuntu Pro
vim-runtime 2:8.0.1453-1ubuntu1.13+esm20
Available with Ubuntu Pro
vim-tiny 2:8.0.1453-1ubuntu1.13+esm20
Available with Ubuntu Pro
xxd 2:8.0.1453-1ubuntu1.13+esm20
Available with Ubuntu Pro
Ubuntu 16.04 LTS
vim 2:7.4.1689-3ubuntu1.5+esm35
Available with Ubuntu Pro
vim-athena 2:7.4.1689-3ubuntu1.5+esm35
Available with Ubuntu Pro
vim-athena-py2 2:7.4.1689-3ubuntu1.5+esm35
Available with Ubuntu Pro
vim-common 2:7.4.1689-3ubuntu1.5+esm35
Available with Ubuntu Pro
vim-gnome 2:7.4.1689-3ubuntu1.5+esm35
Available with Ubuntu Pro
vim-gnome-py2 2:7.4.1689-3ubuntu1.5+esm35
Available with Ubuntu Pro
vim-gtk 2:7.4.1689-3ubuntu1.5+esm35
Available with Ubuntu Pro
vim-gtk-py2 2:7.4.1689-3ubuntu1.5+esm35
Available with Ubuntu Pro
vim-gtk3 2:7.4.1689-3ubuntu1.5+esm35
Available with Ubuntu Pro
vim-gtk3-py2 2:7.4.1689-3ubuntu1.5+esm35
Available with Ubuntu Pro
vim-gui-common 2:7.4.1689-3ubuntu1.5+esm35
Available with Ubuntu Pro
vim-nox 2:7.4.1689-3ubuntu1.5+esm35
Available with Ubuntu Pro
vim-nox-py2 2:7.4.1689-3ubuntu1.5+esm35
Available with Ubuntu Pro
vim-runtime 2:7.4.1689-3ubuntu1.5+esm35
Available with Ubuntu Pro
vim-tiny 2:7.4.1689-3ubuntu1.5+esm35
Available with Ubuntu Pro
Ubuntu 14.04 LTS
vim 2:7.4.052-1ubuntu3.1+esm29
Available with Ubuntu Pro
vim-athena 2:7.4.052-1ubuntu3.1+esm29
Available with Ubuntu Pro
vim-common 2:7.4.052-1ubuntu3.1+esm29
Available with Ubuntu Pro
vim-gnome 2:7.4.052-1ubuntu3.1+esm29
Available with Ubuntu Pro
vim-gtk 2:7.4.052-1ubuntu3.1+esm29
Available with Ubuntu Pro
vim-gui-common 2:7.4.052-1ubuntu3.1+esm29
Available with Ubuntu Pro
vim-lesstif 2:7.4.052-1ubuntu3.1+esm29
Available with Ubuntu Pro
vim-nox 2:7.4.052-1ubuntu3.1+esm29
Available with Ubuntu Pro
vim-runtime 2:7.4.052-1ubuntu3.1+esm29
Available with Ubuntu Pro
vim-tiny 2:7.4.052-1ubuntu3.1+esm29
Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-8451-1
CVE-2026-47162, CVE-2026-47167, CVE-2026-52858, CVE-2026-52859,
CVE-2026-52860
Package Information:
https://launchpad.net/ubuntu/+source/vim/2:9.1.2141-1ubuntu4.5
https://launchpad.net/ubuntu/+source/vim/2:9.1.0967-1ubuntu6.7
https://launchpad.net/ubuntu/+source/vim/2:9.1.0016-1ubuntu7.16
https://launchpad.net/ubuntu/+source/vim/2:8.2.3995-1ubuntu2.32
[USN-8453-1] Net::CIDR::Lite vulnerabilities
==========================================================================
Ubuntu Security Notice USN-8453-1
June 18, 2026
libnet-cidr-lite-perl vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 26.04 LTS
- Ubuntu 25.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
Summary:
Several security issues were fixed in Net::CIDR::Lite.
Software Description:
- libnet-cidr-lite-perl: module for merging IPv4 or IPv6 CIDR address ranges
Details:
It was discovered that Net::CIDR::Lite incorrectly validated IP address and
CIDR mask inputs. An attacker could possibly use this issue to bypass IP
access control lists. (CVE-2026-45190)
It was discovered that Net::CIDR::Lite incorrectly handled extraneous zero
characters in CIDR mask values. An attacker could possibly use this issue
to bypass IP access control lists. (CVE-2026-45191)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 26.04 LTS
libnet-cidr-lite-perl 0.22-2ubuntu0.26.04.2
Ubuntu 25.10
libnet-cidr-lite-perl 0.22-2ubuntu0.25.10.2
Ubuntu 24.04 LTS
libnet-cidr-lite-perl 0.22-2ubuntu0.24.04.2
Ubuntu 22.04 LTS
libnet-cidr-lite-perl 0.22-1ubuntu0.2
Ubuntu 20.04 LTS
libnet-cidr-lite-perl 0.21-2ubuntu0.1+esm2
Available with Ubuntu Pro
Ubuntu 18.04 LTS
libnet-cidr-lite-perl 0.21-1ubuntu0.18.04.1~esm2
Available with Ubuntu Pro
Ubuntu 16.04 LTS
libnet-cidr-lite-perl 0.21-1ubuntu0.16.04.1~esm2
Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-8453-1
CVE-2026-45190, CVE-2026-45191
Package Information:
https://launchpad.net/ubuntu/+source/libnet-cidr-lite-perl/0.22-2ubuntu0.26.04.2
https://launchpad.net/ubuntu/+source/libnet-cidr-lite-perl/0.22-2ubuntu0.25.10.2
https://launchpad.net/ubuntu/+source/libnet-cidr-lite-perl/0.22-2ubuntu0.24.04.2
https://launchpad.net/ubuntu/+source/libnet-cidr-lite-perl/0.22-1ubuntu0.2
[USN-8447-2] LXD vulnerabilities
==========================================================================
Ubuntu Security Notice USN-8447-2
June 18, 2026
lxd vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
Summary:
Several security issues were fixed in LXD.
Software Description:
- lxd: Container hypervisor based on LXC
Details:
USN-8447-1 fixed vulnerabilities in Go Cryptography. This update provides
the corresponding updates for Go Cryptography code embedded in LXD for
CVE-2026-39830, CVE-2026-39833, CVE-2026-39834, and CVE-2026-42508.
Original advisory details:
It was discovered that Go Cryptography did not properly handle SSH global
request responses. A remote attacker could possibly use this issue to cause
a denial of service. (CVE-2026-39830)
It was discovered that Go Cryptography did not properly verify user
presence when using FIDO/U2F security keys. An attacker could possibly use
this issue to bypass user presence verification for hardware security keys.
This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04
LTS, and Ubuntu 26.04 LTS. (CVE-2026-39831)
It was discovered that Go Cryptography did not properly serialize SSH agent
key constraint extensions. An attacker could possibly use this issue to
bypass intended key usage restrictions. This issue only affected Ubuntu
20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS.
(CVE-2026-39832)
It was discovered that Go Cryptography did not properly enforce the
confirm-before-use constraint in the SSH agent keyring. An attacker could
possibly use this issue to use SSH keys without the required user
confirmation. (CVE-2026-39833)
It was discovered that Go Cryptography had an integer overflow when
handling large SSH channel writes. A remote attacker could possibly use
this issue to cause a denial of service. (CVE-2026-39834)
It was discovered that Go Cryptography did not properly check certificate
authority key revocation. An attacker could possibly use this issue to
bypass certificate authority revocation checks. This issue only affected
Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and
Ubuntu 26.04 LTS. (CVE-2026-42508)
It was discovered that Go Cryptography did not properly enforce the source-
address critical option for all SSH server callback types. An attacker
could possibly use this issue to bypass source address authorization
restrictions. This issue only affected Ubuntu 26.04 LTS. (CVE-2026-46595)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 18.04 LTS
lxd 3.0.3-0ubuntu1~18.04.2+esm3
Available with Ubuntu Pro
Ubuntu 16.04 LTS
lxd 2.0.11-0ubuntu1~16.04.4+esm3
Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-8447-2
https://ubuntu.com/security/notices/USN-8447-1
CVE-2026-39830, CVE-2026-39833, CVE-2026-39834, CVE-2026-42508
