|
|
Log in / Subscribe / Register

Ubuntu alert USN-8374-1 (linux-aws-6.17, linux-gcp, linux-gcp-6.17)



From:
              Rodrigo Figueiredo Zaiden via ubuntu-security-announce <ubuntu-security-announce@lists.ubuntu.com>


To:
              ubuntu-security-announce@lists.ubuntu.com


Subject:
              [USN-8374-1] Linux kernel vulnerabilities


Date:
              Tue, 02 Jun 2026 15:02:47 -0300


Message-ID:
              <19494068-71d3-4657-979e-2f30af149538@canonical.com>


Cc:
              Rodrigo Figueiredo Zaiden <rodrigo.zaiden@canonical.com>


==========================================================================
Ubuntu Security Notice USN-8374-1
June 02, 2026

linux-aws-6.17, linux-gcp, linux-gcp-6.17 vulnerabilities
==========================================================================

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

- Ubuntu 25.10
- Ubuntu 24.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-aws-6.17: Linux kernel for Amazon Web Services (AWS) systems
- linux-gcp-6.17: Linux kernel for Google Cloud Platform (GCP) systems

Details:

It was discovered that the Linux kernel algif_aead module did not properly
handle in-place cryptographic operations. This flaw is known as Copy Fail.
A local attacker could use this to escalate privileges, or possibly escape
a container. (CVE-2026-31431)

It was discovered that the Linux kernel did not properly handle shared page
fragments during socket buffer operations, collectively known as Dirty
Frag. A logic flaw existed in the XFRM ESP-in-TCP subsystem and in the
RxRPC networking subsystem when processing paged fragments. A local
attacker could use this to escalate privileges, or possibly escape a
container. (CVE-2026-43284, CVE-2026-43500, CVE-2026-45998, CVE-2026-46000)

It was discovered that a logic flaw existed in the XFRM ESP-in-TCP
subsystem in the Linux kernel when handling socket buffer fragments. This
flaw is known as Fragnesia. A local attacker could use this to escalate
privileges, or possibly escape a container. (CVE-2026-43503,
CVE-2026-46300)

Qualys discovered that a race condition existed in the ptrace subsystem of
the Linux kernel when privileged processes are exiting. An unprivileged
local attacker could use this issue to expose sensitive information.
(CVE-2026-46333)

Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0
contain a memory leak when handling AppArmor notifications. A local
attacker could use this to cause resource exhaustion. (CVE-2026-47326)

Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0
contain a NULL pointer dereference when handling AppArmor notifications. A
local attacker could use this to cause a kernel oops. (CVE-2026-47327)

Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0
contained an invalid free when handling AppArmor notifications. A local
attacker could use this to corrupt kernel memory. (CVE-2026-47328)

Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0
contained insufficient validation of AppArmor notification responses. A
local attacker could use this to allow crafted responses to be processed.
(CVE-2026-47329)

Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 used
an uninitialized variable when handling AppArmor notifications. A local
attacker could use this to cause incorrect caching of data.
(CVE-2026-47330)

Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0
contained an out-of-bounds (OOB) read when handling AppArmor notifications.
A local attacker could use this to cause information disclosure of kernel
memory. (CVE-2026-47332)

Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0
contained a out-of-bounds (OOB) read when handling AppArmor notifications.
A local attacker could use this to cause kernel memory corruption and,
theoretically, influence processing of AppArmor policies. (CVE-2026-47333)

Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0
contained incorrect holding of locks when handling AppArmor notifications.
A local attacker could use this to cause a kernel panic or deadlock.
(CVE-2026-47334)

Tristan Madani and Trevor Lawrence have each independently discovered that
Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained a NULL pointer dereference
when handling AppArmor network socket mediation. A local attacker could use
this to cause a kernel oops. (CVE-2026-47337)

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:
   - S390 architecture;
   - Cryptographic API;
   - GPU drivers;
   - Ethernet bonding driver;
   - Network file system (NFS) server daemon;
   - Distributed Switch Architecture;
   - Netfilter;
   - Control group (cgroup);
   - Kernel kexec() syscall;
   - Memory management;
   - MAC80211 subsystem;
   - Multipath TCP;
   - Packet sockets;
   - RDS protocol;
   - RxRPC session sockets;
   - TLS protocol;
   - Unix domain sockets;
   - AppArmor security module;
(CVE-2025-71088, CVE-2025-71090, CVE-2025-71127, CVE-2025-71134,
CVE-2025-71139, CVE-2025-71141, CVE-2025-71142, CVE-2025-71144,
CVE-2025-71152, CVE-2025-71155, CVE-2026-23274, CVE-2026-23351,
CVE-2026-23394, CVE-2026-31419, CVE-2026-31504, CVE-2026-31533,
CVE-2026-31676, CVE-2026-43033, CVE-2026-43077, CVE-2026-43078,
CVE-2026-43494, CVE-2026-45966, CVE-2026-46028)

Update instructions:

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

Ubuntu 25.10
   linux-image-6.17.0-1018-gcp     6.17.0-1018.19
   linux-image-6.17.0-1018-gcp-64k  6.17.0-1018.19
   linux-image-gcp                 6.17.0-1018.19
   linux-image-gcp-6.17            6.17.0-1018.19
   linux-image-gcp-64k             6.17.0-1018.19
   linux-image-gcp-64k-6.17        6.17.0-1018.19

Ubuntu 24.04 LTS
   linux-image-6.17.0-1017-aws     6.17.0-1017.17~24.04.1
   linux-image-6.17.0-1017-aws-64k  6.17.0-1017.17~24.04.1
   linux-image-6.17.0-1018-gcp     6.17.0-1018.19~24.04.1
   linux-image-6.17.0-1018-gcp-64k  6.17.0-1018.19~24.04.1
   linux-image-aws                 6.17.0-1017.17~24.04.1
   linux-image-aws-6.17            6.17.0-1017.17~24.04.1
   linux-image-aws-64k             6.17.0-1017.17~24.04.1
   linux-image-aws-64k-6.17        6.17.0-1017.17~24.04.1
   linux-image-gcp                 6.17.0-1018.19~24.04.1
   linux-image-gcp-6.17            6.17.0-1018.19~24.04.1
   linux-image-gcp-64k             6.17.0-1018.19~24.04.1
   linux-image-gcp-64k-6.17        6.17.0-1018.19~24.04.1

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-8374-1
   CVE-2025-71088, CVE-2025-71090, CVE-2025-71127, CVE-2025-71134,
   CVE-2025-71139, CVE-2025-71141, CVE-2025-71142, CVE-2025-71144,
   CVE-2025-71152, CVE-2025-71155, CVE-2026-23274, CVE-2026-23351,
   CVE-2026-23394, CVE-2026-31419, CVE-2026-31431, CVE-2026-31504,
   CVE-2026-31533, CVE-2026-31676, CVE-2026-43033, CVE-2026-43077,
   CVE-2026-43078, CVE-2026-43284, CVE-2026-43494, CVE-2026-43500,
   CVE-2026-43503, CVE-2026-45966, CVE-2026-45998, CVE-2026-46000,
   CVE-2026-46028, CVE-2026-46300, CVE-2026-46333, CVE-2026-47326,
   CVE-2026-47327, CVE-2026-47328, CVE-2026-47329, CVE-2026-47330,
   CVE-2026-47332, CVE-2026-47333, CVE-2026-47334, CVE-2026-47337

Package Information:
   https://launchpad.net/ubuntu/+source/linux-gcp/6.17.0-101...
   https://launchpad.net/ubuntu/+source/linux-aws-6.17/6.17....
   https://launchpad.net/ubuntu/+source/linux-gcp-6.17/6.17....





Attachment: OpenPGP_signature.asc (type=application/pgp-signature)

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

wsB5BAABCAAjFiEEYrygdx1GDec9TV8EZ0GeRcM5nt0FAmofGscFAwAAAAAACgkQZ0GeRcM5nt2u
4wgApZvpje29wqGDqkauY8m7tuPDFSsQigpL1Rf4vpsH4Ji+K0dKI4Nc1zN3cP5TrP0m1iIE21Uk
aNplKoizMui/p4JJW3G9IzOfe3LFdk3GyYNu/Jr5+Ygf7Dp1pt3aOHpV3asbViSkjO5m0Pw3Def6
QpB3IJgb/EjHl0+iPCk9cT1e8cOm8AF3AprTn2+kySr+cdKUMH1RXz5ZdT5UtxBIsxgPJpFMKWTU
tqzGoIqHW71c5MoF2ZHlQdYxuddzBicuRNYAu1FHfYEZmbuNQlCuqFKHrCWOe+2zxNeRkUgCEmdn
7OkZNz7CBvqJ/YPCF4fCh7kCupRTTs/ioO5AZYTvBA==
=NorH
-----END PGP SIGNATURE-----
to post comments


Copyright © 2026, Eklektix, Inc.
Comments and public postings are copyrighted by their creators.
Linux is a registered trademark of Linus Torvalds