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CVE-2021-3653

Status Candidate

Overview

A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested guest (L2). Due to improper validation of the "int_ctl" field, this issue could allow a malicious L1 to enable AVIC support (Advanced Virtual Interrupt Controller) for the L2 guest. As a result, the L2 guest would be allowed to read/write physical pages of the host, resulting in a crash of the entire system, leak of sensitive data or potential guest-to-host escape. This flaw affects Linux kernel versions prior to 5.14-rc7.

Related Files

Kernel Live Patch Security Notice LSN-0083-1
Posted Jan 6, 2022
Authored by Benjamin M. Romer

The BPF subsystem in the Linux kernel before 4.17 mishandles situations with a long jump over an instruction sequence where inner instructions require substantial expansions into multiple BPF instructions, leading to an overflow. This affects kernel/bpf/core.c and net/core/filter.c. Maxim Levitsky discovered that the KVM hypervisor implementation for AMD processors in the Linux kernel did not properly prevent a guest VM from enabling AVIC in nested guest VMs. An attacker in a guest VM could use this to write to portions of the host’s physical memory. Other vulnerabilities have also been addressed.

tags | advisory, overflow, kernel, vulnerability
systems | linux
advisories | CVE-2018-25020, CVE-2021-22555, CVE-2021-33909, CVE-2021-3653, CVE-2021-4002
SHA-256 | ddd1e7fc677c2b02d3351058bf31466aa231865f93abfb9cdfa1d1ca55622f8d
Red Hat Security Advisory 2021-4768-01
Posted Nov 23, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-4768-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include a use-after-free vulnerability.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2020-36385, CVE-2021-3653
SHA-256 | 2deb3dcde3a273f0d4855c587ef0f76315459d14f090ff85675791b0f8bd282a
Red Hat Security Advisory 2021-4725-03
Posted Nov 18, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-4725-03 - OpenShift Virtualization is Red Hat's virtualization solution designed for Red Hat OpenShift Container Platform. This advisory contains OpenShift Virtualization 2.6.8 images.

tags | advisory
systems | linux, redhat
advisories | CVE-2020-25648, CVE-2021-22922, CVE-2021-22923, CVE-2021-22924, CVE-2021-29923, CVE-2021-34558, CVE-2021-36222, CVE-2021-3653, CVE-2021-3733, CVE-2021-37750
SHA-256 | 00aec26b5e44879b921222ad5caa4a2a5bb4ed97adfe718c6cc6619b1e9c65c6
Red Hat Security Advisory 2021-4692-02
Posted Nov 16, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-4692-02 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include a use-after-free vulnerability.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2020-36385, CVE-2021-3653
SHA-256 | 847aeb471e1110bdfe85f6db89222e1ad85df8245b5a0cced040604401db2fac
Red Hat Security Advisory 2021-4104-01
Posted Nov 3, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-4104-01 - OpenShift Virtualization is Red Hat's virtualization solution designed for Red Hat OpenShift Container Platform.

tags | advisory
systems | linux, redhat
advisories | CVE-2020-25648, CVE-2021-22922, CVE-2021-22923, CVE-2021-22924, CVE-2021-3121, CVE-2021-31525, CVE-2021-33195, CVE-2021-33197, CVE-2021-33198, CVE-2021-34558, CVE-2021-36222, CVE-2021-3653, CVE-2021-37750
SHA-256 | a0f4016bf01db767d10a8aa69fb754c9e874b8c8f685fdd273d310c8660ce13c
Red Hat Security Advisory 2021-3987-01
Posted Oct 26, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-3987-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include bypass and use-after-free vulnerabilities.

tags | advisory, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2019-20934, CVE-2020-36385, CVE-2021-22543, CVE-2021-3653, CVE-2021-3656, CVE-2021-37576
SHA-256 | 040e54ee516bb6e095dc679de0b614bf50bed500cad2c65a61b6b447e5285956
Red Hat Security Advisory 2021-3949-01
Posted Oct 21, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-3949-01 - Red Hat Advanced Cluster Management for Kubernetes 2.1.12 images Red Hat Advanced Cluster Management for Kubernetes provides the capabilities to address common challenges that administrators and site reliability engineers face as they work across a range of public and private cloud environments. Clusters and applications are all visible and managed from a single console—with security policy built in. This advisory contains updates to one or more container images for Red Hat Advanced Cluster Management for Kubernetes. Issues addressed include denial of service, integer overflow, and out of bounds read vulnerabilities.

tags | advisory, denial of service, overflow, vulnerability
systems | linux, redhat
advisories | CVE-2016-4658, CVE-2021-22543, CVE-2021-22922, CVE-2021-22923, CVE-2021-22924, CVE-2021-23840, CVE-2021-23841, CVE-2021-32626, CVE-2021-32627, CVE-2021-32628, CVE-2021-32672, CVE-2021-32675, CVE-2021-32687, CVE-2021-36222, CVE-2021-3653, CVE-2021-3656, CVE-2021-37576, CVE-2021-37750, CVE-2021-41099
SHA-256 | da3bb0a2f0aedf1b55d5f8cbbece5dc6749623ae797a40f9e1cf9bf6796ee1a4
Red Hat Security Advisory 2021-3925-01
Posted Oct 20, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-3925-01 - Red Hat Advanced Cluster Management for Kubernetes 2.3.3 images Red Hat Advanced Cluster Management for Kubernetes provides the capabilities to address common challenges that administrators and site reliability engineers face as they work across a range of public and private cloud environments. Clusters and applications are all visible and managed from a single console—with security policy built in. This advisory contains the container images for Red Hat Advanced Cluster Management for Kubernetes, which fix several bugs and provide security updates. Issues addressed include denial of service, information leakage, integer overflow, and out of bounds read vulnerabilities.

tags | advisory, denial of service, overflow, vulnerability
systems | linux, redhat
advisories | CVE-2016-4658, CVE-2020-25648, CVE-2021-21670, CVE-2021-21671, CVE-2021-22543, CVE-2021-22922, CVE-2021-22923, CVE-2021-22924, CVE-2021-23017, CVE-2021-23840, CVE-2021-23841, CVE-2021-25741, CVE-2021-32626, CVE-2021-32627, CVE-2021-32628, CVE-2021-32672, CVE-2021-32675, CVE-2021-32687, CVE-2021-32690, CVE-2021-36222, CVE-2021-3653, CVE-2021-3656, CVE-2021-37576, CVE-2021-37750, CVE-2021-41099
SHA-256 | fd1035fefbb8b3d06fa3e4a659771a25d330eb9fd90f1ff55f4f16a1d0ab3d2c
Red Hat Security Advisory 2021-3904-01
Posted Oct 19, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-3904-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2021-3653, CVE-2021-3656
SHA-256 | 5fc93d37def04fd1e86154ba157898a079e951d740a8aafda9d46d433905d5a1
Red Hat Security Advisory 2021-3909-01
Posted Oct 19, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-3909-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2021-3653, CVE-2021-3656
SHA-256 | edd6561fdcf1881cfa62dc9cf279e9fb9be111996145e47e3940df26e28bb81a
Red Hat Security Advisory 2021-3873-01
Posted Oct 15, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-3873-01 - Red Hat Advanced Cluster Management for Kubernetes 2.2.9 images Red Hat Advanced Cluster Management for Kubernetes provides the capabilities to address common challenges that administrators and site reliability engineers face as they work across a range of public and private cloud environments. Clusters and applications are all visible and managed from a single console — with security policy built in. This advisory contains the container images for Red Hat Advanced Cluster Management for Kubernetes, which provide bug fixes and security fixes. Issues addressed include bypass, denial of service, integer overflow, and out of bounds read vulnerabilities.

tags | advisory, denial of service, overflow, vulnerability
systems | linux, redhat
advisories | CVE-2021-22922, CVE-2021-22923, CVE-2021-22924, CVE-2021-23017, CVE-2021-23434, CVE-2021-32626, CVE-2021-32627, CVE-2021-32628, CVE-2021-32672, CVE-2021-32675, CVE-2021-32687, CVE-2021-36222, CVE-2021-3653, CVE-2021-37750, CVE-2021-41099
SHA-256 | b4c1512c3c02a0773b56b0befe34c43efa0dbab79ff54109600f1815b01d985e
Red Hat Security Advisory 2021-3851-01
Posted Oct 14, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-3851-01 - Red Hat 3scale API Management delivers centralized API management features through a distributed, cloud-hosted layer. It includes built-in features to help in building a more successful API program, including access control, rate limits, payment gateway integration, and developer experience tools. This advisory is intended to use with Container Images, for Red Hat 3scale API Management 2.11.0. Issues addressed include a cross site scripting vulnerability.

tags | advisory, xss
systems | linux, redhat
advisories | CVE-2020-8911, CVE-2020-8912, CVE-2021-22922, CVE-2021-22923, CVE-2021-22924, CVE-2021-27218, CVE-2021-3442, CVE-2021-36222, CVE-2021-3653, CVE-2021-3715, CVE-2021-37750
SHA-256 | e4888f040246d49c7a7c2e4f31bece8b08efa09009b3ee41382c5876a9bfdbbc
Red Hat Security Advisory 2021-3801-01
Posted Oct 13, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-3801-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include a bypass vulnerability.

tags | advisory, kernel, bypass
systems | linux, redhat
advisories | CVE-2021-22543, CVE-2021-3653, CVE-2021-3656, CVE-2021-37576
SHA-256 | 43375940a511d5f02ee335cf93c2c5063eb0463c68eccf3009a5851833c8ca76
Red Hat Security Advisory 2021-3802-01
Posted Oct 13, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-3802-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include a bypass vulnerability.

tags | advisory, kernel, bypass
systems | linux, redhat
advisories | CVE-2021-22543, CVE-2021-3653, CVE-2021-3656
SHA-256 | 5b1ebe261d92ad6242105967277f1111639d4d7c9644a3c0390ce169899a22f4
Red Hat Security Advisory 2021-3812-01
Posted Oct 12, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-3812-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include bypass and out of bounds write vulnerabilities.

tags | advisory, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2021-22543, CVE-2021-22555, CVE-2021-3653, CVE-2021-3656, CVE-2021-37576
SHA-256 | d2eac6f1add09be972a2780c9efa45b78b7848496f88beb863ed2785ea677c2b
Red Hat Security Advisory 2021-3767-02
Posted Oct 12, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-3767-02 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include a bypass vulnerability.

tags | advisory, kernel, bypass
systems | linux, redhat
advisories | CVE-2021-22543, CVE-2021-3653
SHA-256 | 39ad8c0e4cee4588c9eb7b845059e4ae01204b26fa6ba2d6593a7f87ce11af92
Debian Security Advisory 4978-1
Posted Sep 28, 2021
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4978-1 - Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, debian
advisories | CVE-2020-16119, CVE-2020-3702, CVE-2021-3653, CVE-2021-3656, CVE-2021-3679, CVE-2021-3732, CVE-2021-3739, CVE-2021-3743, CVE-2021-3753, CVE-2021-37576, CVE-2021-38160, CVE-2021-38166, CVE-2021-38199, CVE-2021-40490
SHA-256 | 58e6e00aeccd2d98b5f0fbd9438d9ad7fea0354cd2d4fc6a894c0d2ecc5f5d7f
Red Hat Security Advisory 2021-3676-01
Posted Sep 28, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-3676-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2021-3653, CVE-2021-3656
SHA-256 | 3890d30cbbe4c135f4f392438402e64ce8d51636134209fb2750f26e7d7532aa
Red Hat Security Advisory 2021-3653-01
Posted Sep 24, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-3653-01 - Red Hat Advanced Cluster Management 2.1.11 security fix and container updates are available.

tags | advisory
systems | linux, redhat
advisories | CVE-2020-27777, CVE-2021-22555, CVE-2021-22922, CVE-2021-22923, CVE-2021-22924, CVE-2021-23017, CVE-2021-29154, CVE-2021-29650, CVE-2021-31535, CVE-2021-32399, CVE-2021-36222, CVE-2021-3653, CVE-2021-37750
SHA-256 | 15f863255ce01b9af4125b6f699165597020889114335a232c7f75076dc7e35c
Ubuntu Security Notice USN-5073-2
Posted Sep 17, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5073-2 - Maxim Levitsky and Paolo Bonzini discovered that the KVM hypervisor implementation for AMD processors in the Linux kernel allowed a guest VM to disable restrictions on VMLOAD/VMSAVE in a nested guest. An attacker in a guest VM could use this to read or write portions of the host's physical memory. Maxim Levitsky discovered that the KVM hypervisor implementation for AMD processors in the Linux kernel did not properly prevent a guest VM from enabling AVIC in nested guest VMs. An attacker in a guest VM could use this to write to portions of the host's physical memory. Various other issues were also addressed.

tags | advisory, kernel
systems | linux, ubuntu
advisories | CVE-2021-34693, CVE-2021-3612, CVE-2021-3653, CVE-2021-3656, CVE-2021-38160
SHA-256 | 73db5d8411c29b8d786d41416069b7ec21b2ce13e2e482965f04c46f510de2e2
Ubuntu Security Notice USN-5071-2
Posted Sep 17, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5071-2 - USN-5071-1 fixed vulnerabilities in the Linux kernel for Ubuntu 20.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 20.04 LTS for Ubuntu 18.04 LTS. Maxim Levitsky and Paolo Bonzini discovered that the KVM hypervisor implementation for AMD processors in the Linux kernel allowed a guest VM to disable restrictions on VMLOAD/VMSAVE in a nested guest. An attacker in a guest VM could use this to read or write portions of the host's physical memory. Various other issues were also addressed.

tags | advisory, kernel, vulnerability
systems | linux, ubuntu
advisories | CVE-2020-36311, CVE-2021-22543, CVE-2021-3612, CVE-2021-3653, CVE-2021-3656
SHA-256 | 08286776d53ae93088aee6f142faa0c27c8411ae4ab3530488089971ed861760
Ubuntu Security Notice USN-5082-1
Posted Sep 17, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5082-1 - Maxim Levitsky and Paolo Bonzini discovered that the KVM hypervisor implementation for AMD processors in the Linux kernel allowed a guest VM to disable restrictions on VMLOAD/VMSAVE in a nested guest. An attacker in a guest VM could use this to read or write portions of the host's physical memory. Maxim Levitsky discovered that the KVM hypervisor implementation for AMD processors in the Linux kernel did not properly prevent a guest VM from enabling AVIC in nested guest VMs. An attacker in a guest VM could use this to write to portions of the host's physical memory. Various other issues were also addressed.

tags | advisory, kernel
systems | linux, ubuntu
advisories | CVE-2021-3609, CVE-2021-3653, CVE-2021-3656
SHA-256 | 1691e96b342a299e6c7efc1bf7e7d50d0589e4769c49bd5e499e3b03e5e044c7
Red Hat Security Advisory 2021-3548-01
Posted Sep 15, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-3548-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2021-3653
SHA-256 | f34440cff5dd52d12aa31bc2944cbaba64cc43262880839ccb4109041d1a196d
Red Hat Security Advisory 2021-3547-01
Posted Sep 15, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-3547-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2021-3653
SHA-256 | d2e1a538fee4ab87f53ee19a0fbe11b5a6d73ce5fe3f7b354441143aa1d36878
Kernel Live Patch Security Notice LSN-0081-1
Posted Sep 14, 2021
Authored by Benjamin M. Romer

Maxim Levitsky discovered that the KVM hypervisor implementation for AMD processors in the Linux kernel did not properly prevent a guest VM from enabling AVIC in nested guest VMs. An attacker in a guest VM could use this to write to portions of the host’s physical memory. Maxim Levitsky and Paolo Bonzini discovered that the KVM hypervisor implementation for AMD processors in the Linux kernel allowed a guest VM to disable restrictions on VMLOAD/VMSAVE in a nested guest. An attacker in a guest VM could use this to read or write portions of the host's physical memory. Various other vulnerabilities were also addressed.

tags | advisory, kernel, vulnerability
systems | linux
advisories | CVE-2021-22555, CVE-2021-33909, CVE-2021-3653, CVE-2021-3656
SHA-256 | 051e461652f3d7e1d5f1bd5ab2e8d9f2f9a398877fa90de84818f4955d1a2074
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