-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Important: kernel-rt security and bug fix update Advisory ID: RHSA-2021:4875-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:4875 Issue date: 2021-11-30 CVE Names: CVE-2020-36385 CVE-2021-20317 ==================================================================== 1. Summary: An update for kernel-rt is now available for Red Hat Enterprise Linux 8.2 Extended Update Support. 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 Real Time EUS (v. 8.2) - x86_64 Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2) - 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: use-after-free in drivers/infiniband/core/ucma.c ctx use-after-free (CVE-2020-36385) * kernel: timer tree corruption leads to missing wakeup and system freeze (CVE-2021-20317) 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 latest RHEL-8.2.z13 Batch source tree (BZ#2020969) 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/): 1974319 - CVE-2020-36385 kernel: use-after-free in drivers/infiniband/core/ucma.c ctx use-after-free 2005258 - CVE-2021-20317 kernel: timer tree corruption leads to missing wakeup and system freeze 6. Package List: Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2): Source: kernel-rt-4.18.0-193.70.1.rt13.120.el8_2.src.rpm x86_64: kernel-rt-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm kernel-rt-core-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm kernel-rt-debug-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm kernel-rt-debug-core-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm kernel-rt-debug-devel-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm kernel-rt-debug-kvm-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm kernel-rt-debug-modules-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm kernel-rt-debuginfo-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm kernel-rt-devel-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm kernel-rt-kvm-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm kernel-rt-modules-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm kernel-rt-modules-extra-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm Red Hat Enterprise Linux Real Time EUS (v. 8.2): Source: kernel-rt-4.18.0-193.70.1.rt13.120.el8_2.src.rpm x86_64: kernel-rt-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm kernel-rt-core-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm kernel-rt-debug-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm kernel-rt-debug-core-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm kernel-rt-debug-devel-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm kernel-rt-debug-modules-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm kernel-rt-debuginfo-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm kernel-rt-devel-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm kernel-rt-modules-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm kernel-rt-modules-extra-4.18.0-193.70.1.rt13.120.el8_2.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-2020-36385 https://access.redhat.com/security/cve/CVE-2021-20317 https://access.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2021 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBYaaMktzjgjWX9erEAQh95g/+M371f5LXpeUM5sMAeEMmgHFAVp89beu/ +0ckhNmPTCxtCJ5fOy3fU9ADMYNm+ElGdyQLRFeRUPJe0bIPUMA2ly8nTcOo8xes sqqX7qkFDA+jHmAUKBGSnx90095Wwut2OJNNbBh+Nuf9hApCjXyDk0c2NseRSPB0 DtiXoTEOaC8odj/aMUHMu8u1toaghJkF8hcehVPHarfKwLiNPFjbPUqrMBp0yfzZ PTNJ1APxqpgLar37e+vT5ZSvo3OaP5acfD19wsQAwet9bHa3yHMPW2cWh7mJqd2v aFMUqGZLQWogU+5akRELTmraKctWN5T4LtMq1X5i+Q6v9bXsVQn9PiSd1Dgua9JH BxeP6PwMFP3+Hyo5Ef0fa9+CeUFevxlsKU6zWaPZoBoTtNW+w1EKuklt70AMD11U RpgYX1+PlXGClkgE7t9Tgoae6E5nq+hNMgC9QmP7ZiQeqJEpNL+lc6ydJlu0wK2O OfDek15ck9LxI/W90G+elufVJ0E1C8BUROuqTwqvKf2fOKebXxHfTHacQzcgp45o ink5bPIkuCwjVSNA1ggRaDIb40c23idq1x1nHyQPB7G+6JQqfsD2JCaajeEFB3PR Xj+TSn/iWceaSX2L99Ols8EmB06JHJe72jLC+E8bD2HEM4fLXP7NdaJRU8Nn5MkW ytdmGe/Oxy0=4H6u -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://listman.redhat.com/mailman/listinfo/rhsa-announce