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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.4330 kernel and kernel-rt security and bug fix updates 22 December 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kernel kernel-rt Publisher: Red Hat Operating System: Red Hat Impact/Access: Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2021-20321 Reference: ESB-2021.4282 Original Bulletin: https://access.redhat.com/errata/RHSA-2021:5227 https://access.redhat.com/errata/RHSA-2021:5241 Comment: This bulletin contains two (2) Red Hat security advisories. - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Moderate: kernel security and bug fix update Advisory ID: RHSA-2021:5227-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:5227 Issue date: 2021-12-21 CVE Names: CVE-2021-20321 ===================================================================== 1. Summary: An update for kernel is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. 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 CodeReady Linux Builder (v. 8) - aarch64, ppc64le, x86_64 Red Hat Enterprise Linux BaseOS (v. 8) - aarch64, noarch, ppc64le, s390x, x86_64 3. Description: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: In Overlayfs missing a check for a negative dentry before calling vfs_rename() (CVE-2021-20321) 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): * panic while breaking a lease/delegation after user mode helper invocation (BZ#2010333) * The ASR driver is causing a system crash in RHEL8.4 compared to RHEL8.3 due to kernel changes (BZ#2016384) * RHEL8: DFS provided SMB shares are not accessible following unprivileged access (BZ#2017177) * Avoid hitting the rtnl_trylock/restart_syscall logic in net-sysfs when possible (BZ#2021165) * RHEL8: x86/Kconfig: Do not enable AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT (BZ#2024678) * RHEL8.4-[Regression][P10][DD2.0][Rainier/Denali] - system crashed while offlining and onlining cores (BZ#2026450) 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/): 2013242 - CVE-2021-20321 kernel: In Overlayfs missing a check for a negative dentry before calling vfs_rename() 6. Package List: Red Hat Enterprise Linux BaseOS (v. 8): Source: kernel-4.18.0-348.7.1.el8_5.src.rpm aarch64: bpftool-4.18.0-348.7.1.el8_5.aarch64.rpm bpftool-debuginfo-4.18.0-348.7.1.el8_5.aarch64.rpm kernel-4.18.0-348.7.1.el8_5.aarch64.rpm kernel-core-4.18.0-348.7.1.el8_5.aarch64.rpm kernel-cross-headers-4.18.0-348.7.1.el8_5.aarch64.rpm kernel-debug-4.18.0-348.7.1.el8_5.aarch64.rpm kernel-debug-core-4.18.0-348.7.1.el8_5.aarch64.rpm kernel-debug-debuginfo-4.18.0-348.7.1.el8_5.aarch64.rpm kernel-debug-devel-4.18.0-348.7.1.el8_5.aarch64.rpm kernel-debug-modules-4.18.0-348.7.1.el8_5.aarch64.rpm kernel-debug-modules-extra-4.18.0-348.7.1.el8_5.aarch64.rpm kernel-debuginfo-4.18.0-348.7.1.el8_5.aarch64.rpm kernel-debuginfo-common-aarch64-4.18.0-348.7.1.el8_5.aarch64.rpm kernel-devel-4.18.0-348.7.1.el8_5.aarch64.rpm kernel-headers-4.18.0-348.7.1.el8_5.aarch64.rpm kernel-modules-4.18.0-348.7.1.el8_5.aarch64.rpm kernel-modules-extra-4.18.0-348.7.1.el8_5.aarch64.rpm kernel-tools-4.18.0-348.7.1.el8_5.aarch64.rpm kernel-tools-debuginfo-4.18.0-348.7.1.el8_5.aarch64.rpm kernel-tools-libs-4.18.0-348.7.1.el8_5.aarch64.rpm perf-4.18.0-348.7.1.el8_5.aarch64.rpm perf-debuginfo-4.18.0-348.7.1.el8_5.aarch64.rpm python3-perf-4.18.0-348.7.1.el8_5.aarch64.rpm python3-perf-debuginfo-4.18.0-348.7.1.el8_5.aarch64.rpm noarch: kernel-abi-stablelists-4.18.0-348.7.1.el8_5.noarch.rpm kernel-doc-4.18.0-348.7.1.el8_5.noarch.rpm ppc64le: bpftool-4.18.0-348.7.1.el8_5.ppc64le.rpm bpftool-debuginfo-4.18.0-348.7.1.el8_5.ppc64le.rpm kernel-4.18.0-348.7.1.el8_5.ppc64le.rpm kernel-core-4.18.0-348.7.1.el8_5.ppc64le.rpm kernel-cross-headers-4.18.0-348.7.1.el8_5.ppc64le.rpm kernel-debug-4.18.0-348.7.1.el8_5.ppc64le.rpm kernel-debug-core-4.18.0-348.7.1.el8_5.ppc64le.rpm kernel-debug-debuginfo-4.18.0-348.7.1.el8_5.ppc64le.rpm kernel-debug-devel-4.18.0-348.7.1.el8_5.ppc64le.rpm kernel-debug-modules-4.18.0-348.7.1.el8_5.ppc64le.rpm kernel-debug-modules-extra-4.18.0-348.7.1.el8_5.ppc64le.rpm kernel-debuginfo-4.18.0-348.7.1.el8_5.ppc64le.rpm kernel-debuginfo-common-ppc64le-4.18.0-348.7.1.el8_5.ppc64le.rpm kernel-devel-4.18.0-348.7.1.el8_5.ppc64le.rpm kernel-headers-4.18.0-348.7.1.el8_5.ppc64le.rpm kernel-modules-4.18.0-348.7.1.el8_5.ppc64le.rpm kernel-modules-extra-4.18.0-348.7.1.el8_5.ppc64le.rpm kernel-tools-4.18.0-348.7.1.el8_5.ppc64le.rpm kernel-tools-debuginfo-4.18.0-348.7.1.el8_5.ppc64le.rpm kernel-tools-libs-4.18.0-348.7.1.el8_5.ppc64le.rpm perf-4.18.0-348.7.1.el8_5.ppc64le.rpm perf-debuginfo-4.18.0-348.7.1.el8_5.ppc64le.rpm python3-perf-4.18.0-348.7.1.el8_5.ppc64le.rpm python3-perf-debuginfo-4.18.0-348.7.1.el8_5.ppc64le.rpm s390x: bpftool-4.18.0-348.7.1.el8_5.s390x.rpm bpftool-debuginfo-4.18.0-348.7.1.el8_5.s390x.rpm kernel-4.18.0-348.7.1.el8_5.s390x.rpm kernel-core-4.18.0-348.7.1.el8_5.s390x.rpm kernel-cross-headers-4.18.0-348.7.1.el8_5.s390x.rpm kernel-debug-4.18.0-348.7.1.el8_5.s390x.rpm kernel-debug-core-4.18.0-348.7.1.el8_5.s390x.rpm kernel-debug-debuginfo-4.18.0-348.7.1.el8_5.s390x.rpm kernel-debug-devel-4.18.0-348.7.1.el8_5.s390x.rpm kernel-debug-modules-4.18.0-348.7.1.el8_5.s390x.rpm kernel-debug-modules-extra-4.18.0-348.7.1.el8_5.s390x.rpm kernel-debuginfo-4.18.0-348.7.1.el8_5.s390x.rpm kernel-debuginfo-common-s390x-4.18.0-348.7.1.el8_5.s390x.rpm kernel-devel-4.18.0-348.7.1.el8_5.s390x.rpm kernel-headers-4.18.0-348.7.1.el8_5.s390x.rpm kernel-modules-4.18.0-348.7.1.el8_5.s390x.rpm kernel-modules-extra-4.18.0-348.7.1.el8_5.s390x.rpm kernel-tools-4.18.0-348.7.1.el8_5.s390x.rpm kernel-tools-debuginfo-4.18.0-348.7.1.el8_5.s390x.rpm kernel-zfcpdump-4.18.0-348.7.1.el8_5.s390x.rpm kernel-zfcpdump-core-4.18.0-348.7.1.el8_5.s390x.rpm kernel-zfcpdump-debuginfo-4.18.0-348.7.1.el8_5.s390x.rpm kernel-zfcpdump-devel-4.18.0-348.7.1.el8_5.s390x.rpm kernel-zfcpdump-modules-4.18.0-348.7.1.el8_5.s390x.rpm kernel-zfcpdump-modules-extra-4.18.0-348.7.1.el8_5.s390x.rpm perf-4.18.0-348.7.1.el8_5.s390x.rpm perf-debuginfo-4.18.0-348.7.1.el8_5.s390x.rpm python3-perf-4.18.0-348.7.1.el8_5.s390x.rpm python3-perf-debuginfo-4.18.0-348.7.1.el8_5.s390x.rpm x86_64: bpftool-4.18.0-348.7.1.el8_5.x86_64.rpm bpftool-debuginfo-4.18.0-348.7.1.el8_5.x86_64.rpm kernel-4.18.0-348.7.1.el8_5.x86_64.rpm kernel-core-4.18.0-348.7.1.el8_5.x86_64.rpm kernel-cross-headers-4.18.0-348.7.1.el8_5.x86_64.rpm kernel-debug-4.18.0-348.7.1.el8_5.x86_64.rpm kernel-debug-core-4.18.0-348.7.1.el8_5.x86_64.rpm kernel-debug-debuginfo-4.18.0-348.7.1.el8_5.x86_64.rpm kernel-debug-devel-4.18.0-348.7.1.el8_5.x86_64.rpm kernel-debug-modules-4.18.0-348.7.1.el8_5.x86_64.rpm kernel-debug-modules-extra-4.18.0-348.7.1.el8_5.x86_64.rpm kernel-debuginfo-4.18.0-348.7.1.el8_5.x86_64.rpm kernel-debuginfo-common-x86_64-4.18.0-348.7.1.el8_5.x86_64.rpm kernel-devel-4.18.0-348.7.1.el8_5.x86_64.rpm kernel-headers-4.18.0-348.7.1.el8_5.x86_64.rpm kernel-modules-4.18.0-348.7.1.el8_5.x86_64.rpm kernel-modules-extra-4.18.0-348.7.1.el8_5.x86_64.rpm kernel-tools-4.18.0-348.7.1.el8_5.x86_64.rpm kernel-tools-debuginfo-4.18.0-348.7.1.el8_5.x86_64.rpm kernel-tools-libs-4.18.0-348.7.1.el8_5.x86_64.rpm perf-4.18.0-348.7.1.el8_5.x86_64.rpm perf-debuginfo-4.18.0-348.7.1.el8_5.x86_64.rpm python3-perf-4.18.0-348.7.1.el8_5.x86_64.rpm python3-perf-debuginfo-4.18.0-348.7.1.el8_5.x86_64.rpm Red Hat CodeReady Linux Builder (v. 8): aarch64: bpftool-debuginfo-4.18.0-348.7.1.el8_5.aarch64.rpm kernel-debug-debuginfo-4.18.0-348.7.1.el8_5.aarch64.rpm kernel-debuginfo-4.18.0-348.7.1.el8_5.aarch64.rpm kernel-debuginfo-common-aarch64-4.18.0-348.7.1.el8_5.aarch64.rpm kernel-tools-debuginfo-4.18.0-348.7.1.el8_5.aarch64.rpm kernel-tools-libs-devel-4.18.0-348.7.1.el8_5.aarch64.rpm perf-debuginfo-4.18.0-348.7.1.el8_5.aarch64.rpm python3-perf-debuginfo-4.18.0-348.7.1.el8_5.aarch64.rpm ppc64le: bpftool-debuginfo-4.18.0-348.7.1.el8_5.ppc64le.rpm kernel-debug-debuginfo-4.18.0-348.7.1.el8_5.ppc64le.rpm kernel-debuginfo-4.18.0-348.7.1.el8_5.ppc64le.rpm kernel-debuginfo-common-ppc64le-4.18.0-348.7.1.el8_5.ppc64le.rpm kernel-tools-debuginfo-4.18.0-348.7.1.el8_5.ppc64le.rpm kernel-tools-libs-devel-4.18.0-348.7.1.el8_5.ppc64le.rpm perf-debuginfo-4.18.0-348.7.1.el8_5.ppc64le.rpm python3-perf-debuginfo-4.18.0-348.7.1.el8_5.ppc64le.rpm x86_64: bpftool-debuginfo-4.18.0-348.7.1.el8_5.x86_64.rpm kernel-debug-debuginfo-4.18.0-348.7.1.el8_5.x86_64.rpm kernel-debuginfo-4.18.0-348.7.1.el8_5.x86_64.rpm kernel-debuginfo-common-x86_64-4.18.0-348.7.1.el8_5.x86_64.rpm kernel-tools-debuginfo-4.18.0-348.7.1.el8_5.x86_64.rpm kernel-tools-libs-devel-4.18.0-348.7.1.el8_5.x86_64.rpm perf-debuginfo-4.18.0-348.7.1.el8_5.x86_64.rpm python3-perf-debuginfo-4.18.0-348.7.1.el8_5.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-2021-20321 https://access.redhat.com/security/updates/classification/#moderate 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 iQIVAwUBYcHa6tzjgjWX9erEAQgT5A/9FLp0+RuC9/znIdJ72FVkp870KSv6gXjH ZzenXWB9lHdTCNUXHvY6f3En5mR12gf9N+x8WA6LtE4EE2geFd3/n/yP4Qzgp5XD TwR+HaE7cmgXZLMCnLVRZbGeEMbqAmOHbUe3cjgYcePby0+WSknedawK3/WClBu/ qAIOyJ0+b8fjkg3EocOxxM3bDHDlvVeq28s6X/vBeYfXV/pyTMjruJev6x2fCBNJ VK5ToUC/R/1kyrBpONdXHiDMqx0qN1N0UwxSHP/hpdpiQy/+FowKMu8qa/B+H17O jfM3nv+7a/Eu7Yx/BS0E8tfi4md4F4KBsMRGP1VXncOqTFFTpFJw/ruiXCggmF4L h2ulxLcgiGqWgJFV7urrgOVYt09NqXxxaSwF83mhpLnz+eZDDoFKzKgG6HZkBLBl nriLWDCMSoXFGXqmTaWr6hsBUDvYct/sGIMgiMWkgUunk5PWwLk/+D2kFLFlQwdD oEnEqiUrQS2OsPjW8YLVOnkd49I0ynahjmVRs/KnFtmBEzfIPpHNJUfPw73OywTZ uZEaSgc2rvTRb8CCYriD5U/K87P5RVmv+7G3ZcCs0K4Ma1kXeH8waRVVELRb7gAS xeOhiONgFjV4TMp5+QEJHKhJQN6BZzHDqBlkZty2Oy50aU8UcGbezAu6B2qZoKid /gQPXu4ZFDM= =k/Ts - -----END PGP SIGNATURE----- - --------------------------------------------------------------------------------------------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Moderate: kernel-rt security and bug fix update Advisory ID: RHSA-2021:5241-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:5241 Issue date: 2021-12-21 CVE Names: CVE-2021-20321 ===================================================================== 1. Summary: An update for kernel-rt is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. 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 Real Time for NFV (v. 8) - x86_64 Red Hat Enterprise Linux for Real Time (v. 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. Security Fix(es): * kernel: In Overlayfs missing a check for a negative dentry before calling vfs_rename() (CVE-2021-20321) 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): * kernel-rt: update RT source tree to the RHEL-8.5.z1 source tree (BZ#2023988) * [rt] RHEL-8.6: disable KASAN, KCSAN and UBSAN for kernel-rt (BZ#2026384) 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/): 2013242 - CVE-2021-20321 kernel: In Overlayfs missing a check for a negative dentry before calling vfs_rename() 6. Package List: Red Hat Enterprise Linux Real Time for NFV (v. 8): Source: kernel-rt-4.18.0-348.7.1.rt7.137.el8_5.src.rpm x86_64: kernel-rt-4.18.0-348.7.1.rt7.137.el8_5.x86_64.rpm kernel-rt-core-4.18.0-348.7.1.rt7.137.el8_5.x86_64.rpm kernel-rt-debug-4.18.0-348.7.1.rt7.137.el8_5.x86_64.rpm kernel-rt-debug-core-4.18.0-348.7.1.rt7.137.el8_5.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-348.7.1.rt7.137.el8_5.x86_64.rpm kernel-rt-debug-devel-4.18.0-348.7.1.rt7.137.el8_5.x86_64.rpm kernel-rt-debug-kvm-4.18.0-348.7.1.rt7.137.el8_5.x86_64.rpm kernel-rt-debug-modules-4.18.0-348.7.1.rt7.137.el8_5.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-348.7.1.rt7.137.el8_5.x86_64.rpm kernel-rt-debuginfo-4.18.0-348.7.1.rt7.137.el8_5.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-348.7.1.rt7.137.el8_5.x86_64.rpm kernel-rt-devel-4.18.0-348.7.1.rt7.137.el8_5.x86_64.rpm kernel-rt-kvm-4.18.0-348.7.1.rt7.137.el8_5.x86_64.rpm kernel-rt-modules-4.18.0-348.7.1.rt7.137.el8_5.x86_64.rpm kernel-rt-modules-extra-4.18.0-348.7.1.rt7.137.el8_5.x86_64.rpm Red Hat Enterprise Linux for Real Time (v. 8): Source: kernel-rt-4.18.0-348.7.1.rt7.137.el8_5.src.rpm x86_64: kernel-rt-4.18.0-348.7.1.rt7.137.el8_5.x86_64.rpm kernel-rt-core-4.18.0-348.7.1.rt7.137.el8_5.x86_64.rpm kernel-rt-debug-4.18.0-348.7.1.rt7.137.el8_5.x86_64.rpm kernel-rt-debug-core-4.18.0-348.7.1.rt7.137.el8_5.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-348.7.1.rt7.137.el8_5.x86_64.rpm kernel-rt-debug-devel-4.18.0-348.7.1.rt7.137.el8_5.x86_64.rpm kernel-rt-debug-modules-4.18.0-348.7.1.rt7.137.el8_5.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-348.7.1.rt7.137.el8_5.x86_64.rpm kernel-rt-debuginfo-4.18.0-348.7.1.rt7.137.el8_5.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-348.7.1.rt7.137.el8_5.x86_64.rpm kernel-rt-devel-4.18.0-348.7.1.rt7.137.el8_5.x86_64.rpm kernel-rt-modules-4.18.0-348.7.1.rt7.137.el8_5.x86_64.rpm kernel-rt-modules-extra-4.18.0-348.7.1.rt7.137.el8_5.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-2021-20321 https://access.redhat.com/security/updates/classification/#moderate 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 iQIVAwUBYcHa0dzjgjWX9erEAQiaqQ//fB2LPmDURdQ6D3GJ5ZOG5XmRHNcpp770 uDHTljggUK4DnM7422e47ysfmfCHILvDQF6HyUgyNUOaYfLu9OcpqFDrdMWHI2q3 TrSp78BiZqZumEJt0s2C4yMBFGiClExTSQLgWN2atS50+R74vnTQyxEoeLc4GB7R kNKk32EZ/okO8Gfmnh4+XAqhtotLNYQPlIdpRfhhEFy7/7PkmbGpMJAIW40ZCRc4 szEGhQ28HN8thbumpPPkajZI+maa13luxVMoRAogQ8Q+A9/rI0Qu9ZMrRMBhgGcn OqH9QfS9xwEN3m26lxPq7lkIvocCOtW5LZOSjR8MiCqyON6r1R+9rgPEOcGvASJP 56Vyg106iStzmm0DhEWXpvwLrmXeyw9FfKqprMmfytboBLwSVYKnqinrSkGH8PRm 7A/YSyOKICUdnRxVdpRjABT5mSTWavdFwyChG9+Elgtfjpmhar+fp3Uxm5kZ68A4 ubrx7XM7RPKwcdvGMQeuld/h4bdlI04iiqrWiVhBJtY6qxBCLib6vzbfacO/GNu1 12Eubuxq3dC9U7P2zhgJ3zqTuFTLSQ1UYJFD/uHYsKnxmjAKPyzXQ7yRFuElprSx fso02oy6UfHQ7zjawjEZJoJ55dxu+iIqAZDE4dlynQQ5sWYjuJPL5WlaQnKmsvKP cvTGLEO0elQ= =mSvK - -----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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