========================================================================== Ubuntu Security Notice USN-8634-1 August 12, 2026
linux vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 14.04 LTS
Summary:
Several security issues were fixed in the Linux kernel.
Software Description:
- linux: Linux kernel
Details:
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- x86 architecture;
- Cryptographic API;
- InfiniBand drivers;
- Media drivers;
- STMicroelectronics network drivers;
- Network drivers;
- Ext4 file system;
- IPv4 networking;
- TCP network protocol;
- Locking primitives;
- B.A.T.M.A.N. meshing protocol;
- Ceph Core library;
- IPv6 networking;
- Multipath TCP;
- Netfilter;
- SCTP protocol;
- SMC sockets;
(CVE-2026-31405, CVE-2026-31414, CVE-2026-31448, CVE-2026-31649,
CVE-2026-31659, CVE-2026-31685, CVE-2026-43198, CVE-2026-43493,
CVE-2026-43499, CVE-2026-46266, CVE-2026-52955, CVE-2026-52982,
CVE-2026-52986, CVE-2026-53176, CVE-2026-53225, CVE-2026-53359)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 14.04 LTS
linux-image-3.13.0-215-generic 3.13.0-215.266
Available with Ubuntu Pro
linux-image-3.13.0-215-lowlatency 3.13.0-215.266
Available with Ubuntu Pro
linux-image-generic 3.13.0.215.225
Available with Ubuntu Pro
linux-image-generic-lts-trusty 3.13.0.215.225
Available with Ubuntu Pro
linux-image-lowlatency 3.13.0.215.225
Available with Ubuntu Pro
linux-image-server 3.13.0.215.225
Available with Ubuntu Pro
linux-image-virtual 3.13.0.215.225
Available with Ubuntu Pro
After a standard system update you need to reboot your computer to make
all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.
References:
https://ubuntu.com/security/notices/USN-8634-1
CVE-2026-31405, CVE-2026-31414, CVE-2026-31448, CVE-2026-31649,
CVE-2026-31659, CVE-2026-31685, CVE-2026-43198, CVE-2026-43493,
CVE-2026-43499, CVE-2026-46266, CVE-2026-52955, CVE-2026-52982,
CVE-2026-52986, CVE-2026-53176, CVE-2026-53225, CVE-2026-53359
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