[USN-7296-1] Linux kernel vulnerability

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Ubuntu Security Notice USN-7296-1
February 25, 2025

linux, linux-hwe vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

The system could be made to crash or run programs as an administrator.

Software Description:
- linux: Linux kernel
- linux-hwe: Linux hardware enablement (HWE) kernel

Details:

Attila Szász discovered that the HFS+ file system implementation in the
Linux Kernel contained a heap overflow vulnerability. An attacker could use
a specially crafted file system image that, when mounted, could cause a
denial of service (system crash) or possibly execute arbitrary code.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 18.04 LTS
linux-image-4.15.0-234-generic 4.15.0-234.246
Available with Ubuntu Pro
linux-image-4.15.0-234-lowlatency 4.15.0-234.246
Available with Ubuntu Pro
linux-image-generic 4.15.0.234.218
Available with Ubuntu Pro
linux-image-lowlatency 4.15.0.234.218
Available with Ubuntu Pro
linux-image-virtual 4.15.0.234.218
Available with Ubuntu Pro

Ubuntu 16.04 LTS
linux-image-4.15.0-234-generic 4.15.0-234.246~16.04.1
Available with Ubuntu Pro
linux-image-4.15.0-234-lowlatency 4.15.0-234.246~16.04.1
Available with Ubuntu Pro
linux-image-generic-hwe-16.04 4.15.0.234.246~16.04.1
Available with Ubuntu Pro
linux-image-lowlatency-hwe-16.04 4.15.0.234.246~16.04.1
Available with Ubuntu Pro
linux-image-oem 4.15.0.234.246~16.04.1
Available with Ubuntu Pro
linux-image-virtual-hwe-16.04 4.15.0.234.246~16.04.1
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-7296-1
CVE-2025-0927