This is an OpenPGP/MIME signed message (RFC 4880 and 3156)
--===============3931393775999258102==
Content-Language: en-US
Content-Type: multipart/signed; micalg=pgp-sha256;
 protocol="application/pgp-signature";
 boundary="------------y2qdrHW0tFBygzpcxAh6fsZp"

This is an OpenPGP/MIME signed message (RFC 4880 and 3156)
--------------y2qdrHW0tFBygzpcxAh6fsZp
Content-Type: multipart/mixed;
 boundary="------------i7O4Hu6mxNHI0BmyJQEhZbD5";
 protected-headers="v1"
From: Rodrigo Figueiredo Zaiden <rodrigo.zaiden@canonical.com>
Reply-To: "Security@Ubuntu.com" <Security@ubuntu.com>
To: ubuntu-security-announce@lists.ubuntu.com
Message-ID: <23fd00dc-b2c8-4bb0-9fd9-f39166f7dcc5@canonical.com>
Subject: [USN-7234-5] Linux kernel vulnerabilities

--------------i7O4Hu6mxNHI0BmyJQEhZbD5
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: base64

==========================================================================
Ubuntu Security Notice USN-7234-5
February 25, 2025

linux-aws-5.4 linux-raspi-5.4 vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-aws-5.4: Linux kernel for Amazon Web Services (AWS) systems
- linux-raspi-5.4: Linux kernel for Raspberry Pi systems

Details:

Ye Zhang and Nicolas Wu discovered that the io_uring subsystem in the Linux
kernel did not properly handle locking for rings with IOPOLL, leading to a
double-free vulnerability. A local attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2023-21400)

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:
   - TTY drivers;
   - Netfilter;
   - Network traffic control;
   - VMware vSockets driver;
(CVE-2024-53141, CVE-2024-53103, CVE-2024-40967, CVE-2024-53164)

Update instructions:

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

Ubuntu 18.04 LTS
   linux-image-5.4.0-1122-raspi    5.4.0-1122.134~18.04.1
                                   Available with Ubuntu Pro
   linux-image-5.4.0-1139-aws      5.4.0-1139.149~18.04.1
                                   Available with Ubuntu Pro
   linux-image-aws                 5.4.0.1139.149~18.04.1
                                   Available with Ubuntu Pro
   linux-image-raspi-hwe-18.04     5.4.0.1122.134~18.04.1
                                   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-7234-5
   https://ubuntu.com/security/notices/USN-7234-4
   https://ubuntu.com/security/notices/USN-7234-3
   https://ubuntu.com/security/notices/USN-7234-2
   https://ubuntu.com/security/notices/USN-7234-1
   CVE-2023-21400, CVE-2024-40967, CVE-2024-53103, CVE-2024-53141,
   CVE-2024-53164

--------------i7O4Hu6mxNHI0BmyJQEhZbD5--

--------------y2qdrHW0tFBygzpcxAh6fsZp
Content-Type: application/pgp-signature; name="OpenPGP_signature.asc"
Content-Description: OpenPGP digital signature
Content-Disposition: attachment; filename="OpenPGP_signature.asc"

-----BEGIN PGP SIGNATURE-----

wsB5BAABCAAjFiEEYrygdx1GDec9TV8EZ0GeRcM5nt0FAme92CgFAwAAAAAACgkQZ0GeRcM5nt01
Lwf/Q8/IH0JqvMgZLC2WKn2GhLkc+b3Qi+9PCLiFYrQkta5Xsm9Gm0Oj6uvKuVJ3QIU6Uz5PGm9e
l4czE+4kJe4NjGpwE7To8OLqVbyHM5VMyMKmtuzV6VfdDLEPNjzM3mVw1CfvNfF2Kwpa1HVI3GCQ
6ORDhQbGSicwr3TLfJ/ckQuhbytzvF7QgcnGSKnvmMrIlZ8ykwoymQoxvFBYHB9ODwbCFzJuJKKt
geRRBDmyDaGSD4yVa9+S23Zg+2H2SUY0n1Req3imNd1aVfXnW4OIQCbbGYmhydbcel3a7l2K4Gei
aQ6UpEkrKZzUHalWIXUgPvuL0xroNueo6OefuX6UuQ==
=irXz
-----END PGP SIGNATURE-----

--------------y2qdrHW0tFBygzpcxAh6fsZp--


--===============3931393775999258102==
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: base64
Content-Disposition: inline

Cg==

--===============3931393775999258102==--