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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.3389 kernel-rt security and bug fix update 14 October 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kernel-rt Publisher: Red Hat Operating System: Red Hat Impact/Access: Increased Privileges -- Existing Account Denial of Service -- Existing Account Access Confidential Data -- Existing Account Reduced Security -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2021-22543 CVE-2021-3656 CVE-2021-3653 Reference: ESB-2021.3386 ESB-2021.3324 ESB-2021.3249 ESB-2021.3225 Original Bulletin: https://access.redhat.com/errata/RHSA-2021:3802 - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel-rt security and bug fix update Advisory ID: RHSA-2021:3802-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:3802 Issue date: 2021-10-12 CVE Names: CVE-2021-3653 CVE-2021-3656 CVE-2021-22543 ===================================================================== 1. Summary: An update for kernel-rt is now available for Red Hat Enterprise Linux 7. 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 for Real Time (v. 7) - noarch, x86_64 Red Hat Enterprise Linux for Real Time for NFV (v. 7) - noarch, 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. Security Fix(es): * kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks (CVE-2021-22543) * kernel: SVM nested virtualization issue in KVM (AVIC support) (CVE-2021-3653) * kernel: SVM nested virtualization issue in KVM (VMLOAD/VMSAVE) (CVE-2021-3656) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Bug Fix(es): * Indefinite waiting for RCU callback while removing cgroup (BZ#1967844) * kernel-rt: update to the latest RHEL7.9.z9 source tree (BZ#2002994) 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. Bugs fixed (https://bugzilla.redhat.com/): 1965461 - CVE-2021-22543 kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks 1967844 - Indefinite waiting for RCU callback while removing cgroup 1983686 - CVE-2021-3653 kernel: SVM nested virtualization issue in KVM (AVIC support) 1983988 - CVE-2021-3656 kernel: SVM nested virtualization issue in KVM (VMLOAD/VMSAVE) 6. Package List: Red Hat Enterprise Linux for Real Time for NFV (v. 7): Source: kernel-rt-3.10.0-1160.45.1.rt56.1185.el7.src.rpm noarch: kernel-rt-doc-3.10.0-1160.45.1.rt56.1185.el7.noarch.rpm x86_64: kernel-rt-3.10.0-1160.45.1.rt56.1185.el7.x86_64.rpm kernel-rt-debug-3.10.0-1160.45.1.rt56.1185.el7.x86_64.rpm kernel-rt-debug-debuginfo-3.10.0-1160.45.1.rt56.1185.el7.x86_64.rpm kernel-rt-debug-devel-3.10.0-1160.45.1.rt56.1185.el7.x86_64.rpm kernel-rt-debug-kvm-3.10.0-1160.45.1.rt56.1185.el7.x86_64.rpm kernel-rt-debug-kvm-debuginfo-3.10.0-1160.45.1.rt56.1185.el7.x86_64.rpm kernel-rt-debuginfo-3.10.0-1160.45.1.rt56.1185.el7.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.0-1160.45.1.rt56.1185.el7.x86_64.rpm kernel-rt-devel-3.10.0-1160.45.1.rt56.1185.el7.x86_64.rpm kernel-rt-kvm-3.10.0-1160.45.1.rt56.1185.el7.x86_64.rpm kernel-rt-kvm-debuginfo-3.10.0-1160.45.1.rt56.1185.el7.x86_64.rpm kernel-rt-trace-3.10.0-1160.45.1.rt56.1185.el7.x86_64.rpm kernel-rt-trace-debuginfo-3.10.0-1160.45.1.rt56.1185.el7.x86_64.rpm kernel-rt-trace-devel-3.10.0-1160.45.1.rt56.1185.el7.x86_64.rpm kernel-rt-trace-kvm-3.10.0-1160.45.1.rt56.1185.el7.x86_64.rpm kernel-rt-trace-kvm-debuginfo-3.10.0-1160.45.1.rt56.1185.el7.x86_64.rpm Red Hat Enterprise Linux for Real Time (v. 7): Source: kernel-rt-3.10.0-1160.45.1.rt56.1185.el7.src.rpm noarch: kernel-rt-doc-3.10.0-1160.45.1.rt56.1185.el7.noarch.rpm x86_64: kernel-rt-3.10.0-1160.45.1.rt56.1185.el7.x86_64.rpm kernel-rt-debug-3.10.0-1160.45.1.rt56.1185.el7.x86_64.rpm kernel-rt-debug-debuginfo-3.10.0-1160.45.1.rt56.1185.el7.x86_64.rpm kernel-rt-debug-devel-3.10.0-1160.45.1.rt56.1185.el7.x86_64.rpm kernel-rt-debuginfo-3.10.0-1160.45.1.rt56.1185.el7.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.0-1160.45.1.rt56.1185.el7.x86_64.rpm kernel-rt-devel-3.10.0-1160.45.1.rt56.1185.el7.x86_64.rpm kernel-rt-trace-3.10.0-1160.45.1.rt56.1185.el7.x86_64.rpm kernel-rt-trace-debuginfo-3.10.0-1160.45.1.rt56.1185.el7.x86_64.rpm kernel-rt-trace-devel-3.10.0-1160.45.1.rt56.1185.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/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 iQIVAwUBYWWqc9zjgjWX9erEAQhAEA//Rh6dw2/ShBukc/whdIEgv2f+DoEiRGg+ l4+OLbSp1SXmhfPuP8vvnG7ET6venycQlQ7XhYfLnlPmdIvi8T625mgoyGIWRijg RNS0SxekI4aHXZboZNFz3ezpkbPKuqnVdm2EkhT69qZxLDUibzhXP2nl5Mh3+f99 yDf/uX0d9mlukTrHndVWqN3wRnnNDeNCjkABN0UzjOun3Pn2eHQeJdVsjOGuI1UP jWXTNwSjzecV04SgAVFKyaTK0comTgNcT9cGLWJkIBfh3W0+pNsivX8uz+KIql69 /5+MOy0Rcu6/F279Bp35HsvuSApeudg2cEmA8Yd0SXTr6eUIr8AuC25jIpFA21Cx YdbDM6NAjq2Ry6yMp0hY/PUuxGQRIp0khb9n1ZvVMGn5hDAJF1VWS4h+6QBgRI9T +VCjrLitIcLvVSZ6hbqt749CuozZ/bUomGsdSSBkYl4DaZXA7w8QU9CsTm+wmMYV ZhTDLO/e3/kfY22a3TPwqiKSGv6FUWpNQJjLdk9jyce/RWEp9qwR+DgjFal0L363 nVD+SMVCbb8rDj8Z9hF88BWet4CnO3PeBV3zi3FNiJnCyLpUJJ8D+btmrgDuhQC+ hUkEQZYEUtEqMLn5aL+q1f2zdHPHLhtk10pZ4Uy5nqO63s+5arN6Vm3e1EUiZvLS PLTPGVFl45I= =/YnP - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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