ID

VAR-202105-1451

CVE

CVE-2021-22543

TITLE

Red Hat Security Advisory 2021-3812-01

DESCRIPTION

An issue was discovered in Linux: KVM through Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks and can lead to pages being freed while still accessible by the VMM and guest. This allows users with the ability to start and control a VM to read/write random pages of memory and can result in local privilege escalation. Arch Linux is an application system of Arch open source. A lightweight and flexible Linux® distribution that tries to keep it simple. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Important: kernel security update Advisory ID: RHSA-2021:3812-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:3812 Issue date: 2021-10-12 CVE Names: CVE-2021-3653 CVE-2021-3656 CVE-2021-22543 CVE-2021-22555 CVE-2021-37576 ==================================================================== 1. Summary: An update for kernel is now available for Red Hat Enterprise Linux 7.6 Advanced Update Support, Red Hat Enterprise Linux 7.6 Telco Extended Update Support, and Red Hat Enterprise Linux 7.6 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux Server AUS (v. 7.6) - noarch, x86_64 Red Hat Enterprise Linux Server E4S (v. 7.6) - noarch, ppc64le, x86_64 Red Hat Enterprise Linux Server Optional AUS (v. 7.6) - x86_64 Red Hat Enterprise Linux Server Optional E4S (v. 7.6) - ppc64le, x86_64 Red Hat Enterprise Linux Server Optional TUS (v. 7.6) - x86_64 Red Hat Enterprise Linux Server TUS (v. 7.6) - noarch, x86_64 3. Description: The kernel packages contain the Linux kernel, the core of any Linux operating system. 4. Solution: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect. 5. Package List: Red Hat Enterprise Linux Server AUS (v. 7.6): Source: kernel-3.10.0-957.84.1.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-957.84.1.el7.noarch.rpm kernel-doc-3.10.0-957.84.1.el7.noarch.rpm x86_64: bpftool-3.10.0-957.84.1.el7.x86_64.rpm kernel-3.10.0-957.84.1.el7.x86_64.rpm kernel-debug-3.10.0-957.84.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-957.84.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.84.1.el7.x86_64.rpm kernel-devel-3.10.0-957.84.1.el7.x86_64.rpm kernel-headers-3.10.0-957.84.1.el7.x86_64.rpm kernel-tools-3.10.0-957.84.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-957.84.1.el7.x86_64.rpm perf-3.10.0-957.84.1.el7.x86_64.rpm perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm python-perf-3.10.0-957.84.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm Red Hat Enterprise Linux Server E4S (v. 7.6): Source: kernel-3.10.0-957.84.1.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-957.84.1.el7.noarch.rpm kernel-doc-3.10.0-957.84.1.el7.noarch.rpm ppc64le: kernel-3.10.0-957.84.1.el7.ppc64le.rpm kernel-bootwrapper-3.10.0-957.84.1.el7.ppc64le.rpm kernel-debug-3.10.0-957.84.1.el7.ppc64le.rpm kernel-debug-debuginfo-3.10.0-957.84.1.el7.ppc64le.rpm kernel-debuginfo-3.10.0-957.84.1.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-957.84.1.el7.ppc64le.rpm kernel-devel-3.10.0-957.84.1.el7.ppc64le.rpm kernel-headers-3.10.0-957.84.1.el7.ppc64le.rpm kernel-tools-3.10.0-957.84.1.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-957.84.1.el7.ppc64le.rpm kernel-tools-libs-3.10.0-957.84.1.el7.ppc64le.rpm perf-3.10.0-957.84.1.el7.ppc64le.rpm perf-debuginfo-3.10.0-957.84.1.el7.ppc64le.rpm python-perf-3.10.0-957.84.1.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-957.84.1.el7.ppc64le.rpm x86_64: kernel-3.10.0-957.84.1.el7.x86_64.rpm kernel-debug-3.10.0-957.84.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-957.84.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.84.1.el7.x86_64.rpm kernel-devel-3.10.0-957.84.1.el7.x86_64.rpm kernel-headers-3.10.0-957.84.1.el7.x86_64.rpm kernel-tools-3.10.0-957.84.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-957.84.1.el7.x86_64.rpm perf-3.10.0-957.84.1.el7.x86_64.rpm perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm python-perf-3.10.0-957.84.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm Red Hat Enterprise Linux Server TUS (v. 7.6): Source: kernel-3.10.0-957.84.1.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-957.84.1.el7.noarch.rpm kernel-doc-3.10.0-957.84.1.el7.noarch.rpm x86_64: bpftool-3.10.0-957.84.1.el7.x86_64.rpm kernel-3.10.0-957.84.1.el7.x86_64.rpm kernel-debug-3.10.0-957.84.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-957.84.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.84.1.el7.x86_64.rpm kernel-devel-3.10.0-957.84.1.el7.x86_64.rpm kernel-headers-3.10.0-957.84.1.el7.x86_64.rpm kernel-tools-3.10.0-957.84.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-957.84.1.el7.x86_64.rpm perf-3.10.0-957.84.1.el7.x86_64.rpm perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm python-perf-3.10.0-957.84.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm Red Hat Enterprise Linux Server Optional AUS (v. 7.6): x86_64: kernel-debug-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.84.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-957.84.1.el7.x86_64.rpm perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm Red Hat Enterprise Linux Server Optional E4S (v. 7.6): ppc64le: kernel-debug-debuginfo-3.10.0-957.84.1.el7.ppc64le.rpm kernel-debug-devel-3.10.0-957.84.1.el7.ppc64le.rpm kernel-debuginfo-3.10.0-957.84.1.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-957.84.1.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-957.84.1.el7.ppc64le.rpm kernel-tools-libs-devel-3.10.0-957.84.1.el7.ppc64le.rpm perf-debuginfo-3.10.0-957.84.1.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-957.84.1.el7.ppc64le.rpm x86_64: kernel-debug-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.84.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-957.84.1.el7.x86_64.rpm perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm Red Hat Enterprise Linux Server Optional TUS (v. 7.6): x86_64: kernel-debug-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.84.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-957.84.1.el7.x86_64.rpm perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/ 7. References: https://access.redhat.com/security/cve/CVE-2021-3653 https://access.redhat.com/security/cve/CVE-2021-3656 https://access.redhat.com/security/cve/CVE-2021-22543 https://access.redhat.com/security/cve/CVE-2021-22555 https://access.redhat.com/security/cve/CVE-2021-37576 https://access.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2021 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBYWWkrNzjgjWX9erEAQgeVg//eBUd0HQYAc3u6Nc1nBOOBM+SWHAI6rwT SWbLidMennvaCylOWpdL23fkpPkhCRyj5fbXen2dQGtUop2sEm6nmVLFW6cQO8Yv rfXN3wnrW8P0Ah3QtWeV1O22ah8WzcgeML96xyUl3K7yJSY+evXYYBUM7Q8nbzW1 0K7VJm79SxRsszcNq3R/mG5MuPJV+cSnSlG+1cqK+A+YRVKDIE/7vWiTS1z9GDlY /DIlKzvEcsyaOFnKYg+RQRQ5HCB5Hp2JNjRrz5F+X+KJRoT6KTDlbFY/a34FjYWA fUN3pA0aQtdGgQsAB6+T+pVGTYq0vRWPOXhnN2OaN7a95OwbVC9DmiQXwjLQnn2C rvU52ExQP6Jf+WfNHo7yfFMgR1Eyihkc+/zf0qPQomuEqMjEfqyMXOoPsCoXotGs OBJEVIYvBmA7CYif9L0cQRNJyTFfv1IcXKgP2UgrGdChQnLBz/ijVUU17HcU783R G6hXh2+Ojllbt5/rf2PQfFZYjswIVuGe9/You+T6qQXJ+zInz1GOi92+Vwv+gEGF KNLqZJ1nvB1xOm60noCBhnke5vPbzFA+YNGSJnc0tLxZ6Dek891Qb1Eq1f+rwR/9 wfCEgECYLoGvlc2RXC12m13BLUTL+VjVyc0KmG/O9vjFD42EzeFo8rpuXjVsF7QJ S627544rR1c=4NQZ -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://listman.redhat.com/mailman/listinfo/rhsa-announce . 8) - ppc64le, x86_64 3. Description: This is a kernel live patch module which is automatically loaded by the RPM post-install script to modify the code of a running kernel. 8) - x86_64 3. Description: The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Bug Fix(es): * kernel-rt: update RT source tree to the RHEL-8.4.z source tree (BZ#1985050) * kernel-rt: Merge mm/memcg: Fix kmem_cache_alloc() performance regression (BZ#1987102) 4. 8.1) - aarch64, noarch, ppc64le, s390x, x86_64 3. Description: 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. See the following Release Notes documentation, which will be updated shortly for this release, for additional details about this release: https://access.redhat.com/documentation/en-us/red_hat_advanced_cluster_mana gement_for_kubernetes/2.1/html/release_notes/ Security fixes: * redis: Lua scripts can overflow the heap-based Lua stack (CVE-2021-32626) * redis: Integer overflow issue with Streams (CVE-2021-32627) * redis: Integer overflow bug in the ziplist data structure (CVE-2021-32628) * redis: Integer overflow issue with intsets (CVE-2021-32687) * redis: Integer overflow issue with strings (CVE-2021-41099) * redis: Denial of service via Redis Standard Protocol (RESP) request (CVE-2021-32675) * redis: Out of bounds read in lua debugger protocol parser (CVE-2021-32672) For more details about the security issues, including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Container updates: * RHACM 2.1.12 images (BZ# 2007489) 3. Solution: Before applying this update, make sure all previously released errata relevant to your system have been applied. To apply this upgrade, you must upgrade your OpenShift Container Platform version to 4.6, or later. Bugs fixed (https://bugzilla.redhat.com/): 2007489 - RHACM 2.1.12 images 2010991 - CVE-2021-32687 redis: Integer overflow issue with intsets 2011000 - CVE-2021-32675 redis: Denial of service via Redis Standard Protocol (RESP) request 2011001 - CVE-2021-32672 redis: Out of bounds read in lua debugger protocol parser 2011004 - CVE-2021-32628 redis: Integer overflow bug in the ziplist data structure 2011010 - CVE-2021-32627 redis: Integer overflow issue with Streams 2011017 - CVE-2021-32626 redis: Lua scripts can overflow the heap-based Lua stack 2011020 - CVE-2021-41099 redis: Integer overflow issue with strings 5. (CVE-2021-41073) It was discovered that the Linux kernel did not properly enforce certain types of entries in the Secure Boot Forbidden Signature Database (aka dbx) protection mechanism. ========================================================================== Ubuntu Security Notice USN-5094-1 September 29, 2021 linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-dell300x, linux-gcp, linux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle, linux-snapdragon vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 18.04 LTS - Ubuntu 16.04 ESM - Ubuntu 14.04 ESM Summary: Several security issues were fixed in the Linux kernel. An attacker who could start and control a VM could possibly use this to expose sensitive information or execute arbitrary code. (CVE-2021-22543) It was discovered that the tracing subsystem in the Linux kernel did not properly keep track of per-cpu ring buffer state. A privileged attacker could use this to cause a denial of service. (CVE-2021-3679) Alois Wohlschlager discovered that the overlay file system in the Linux kernel did not restrict private clones in some situations. An attacker could use this to expose sensitive information. (CVE-2021-3732) Alexey Kardashevskiy discovered that the KVM implementation for PowerPC systems in the Linux kernel did not properly validate RTAS arguments in some situations. An attacker in a guest vm could use this to cause a denial of service (host OS crash) or possibly execute arbitrary code. (CVE-2021-37576) It was discovered that the MAX-3421 host USB device driver in the Linux kernel did not properly handle device removal events. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2021-38204) It was discovered that the Xilinx 10/100 Ethernet Lite device driver in the Linux kernel could report pointer addresses in some situations. An attacker could use this information to ease the exploitation of another vulnerability. (CVE-2021-38205) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS: linux-image-4.15.0-1028-dell300x 4.15.0-1028.33 linux-image-4.15.0-1081-oracle 4.15.0-1081.89 linux-image-4.15.0-1100-kvm 4.15.0-1100.102 linux-image-4.15.0-1109-gcp 4.15.0-1109.123 linux-image-4.15.0-1112-aws 4.15.0-1112.119 linux-image-4.15.0-1113-snapdragon 4.15.0-1113.122 linux-image-4.15.0-1124-azure 4.15.0-1124.137 linux-image-4.15.0-159-generic 4.15.0-159.167 linux-image-4.15.0-159-generic-lpae 4.15.0-159.167 linux-image-4.15.0-159-lowlatency 4.15.0-159.167 linux-image-aws-lts-18.04 4.15.0.1112.115 linux-image-azure-lts-18.04 4.15.0.1124.97 linux-image-dell300x 4.15.0.1028.30 linux-image-gcp-lts-18.04 4.15.0.1109.128 linux-image-generic 4.15.0.159.148 linux-image-generic-lpae 4.15.0.159.148 linux-image-kvm 4.15.0.1100.96 linux-image-lowlatency 4.15.0.159.148 linux-image-oracle-lts-18.04 4.15.0.1081.91 linux-image-snapdragon 4.15.0.1113.116 linux-image-virtual 4.15.0.159.148 Ubuntu 16.04 ESM: linux-image-4.15.0-1081-oracle 4.15.0-1081.89~16.04.1 linux-image-4.15.0-1109-gcp 4.15.0-1109.123~16.04.1 linux-image-4.15.0-1112-aws 4.15.0-1112.119~16.04.1 linux-image-4.15.0-1124-azure 4.15.0-1124.137~16.04.1 linux-image-4.15.0-159-generic 4.15.0-159.167~16.04.1 linux-image-4.15.0-159-lowlatency 4.15.0-159.167~16.04.1 linux-image-aws-hwe 4.15.0.1112.103 linux-image-azure 4.15.0.1124.115 linux-image-gcp 4.15.0.1109.110 linux-image-generic-hwe-16.04 4.15.0.159.152 linux-image-gke 4.15.0.1109.110 linux-image-lowlatency-hwe-16.04 4.15.0.159.152 linux-image-oem 4.15.0.159.152 linux-image-oracle 4.15.0.1081.69 linux-image-virtual-hwe-16.04 4.15.0.159.152 Ubuntu 14.04 ESM: linux-image-4.15.0-1124-azure 4.15.0-1124.137~14.04.1 linux-image-azure 4.15.0.1124.97 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

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

local

TYPE

arbitrary

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Red Hat

SOURCES

LAST UPDATE DATE

2025-06-26T21:58:59.606000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE