-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Moderate: kernel-rt security and bug fix update Advisory ID: RHSA-2021:3440-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:3440 Issue date: 2021-09-07 CVE Names: CVE-2021-38201 ===================================================================== 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 (v. 8) - x86_64 Red Hat Enterprise Linux Real Time for NFV (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: slab-out-of-bounds access in xdr_set_page_base() in net/sunrpc/xdr.c (CVE-2021-38201) 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): * OSLAT spikes on subset of cpus (BZ#1986063) * kernel-rt: update RT source tree to the RHEL-8.4.z source tree (BZ#1990013) * Failure to enter full_nohz due to needless SCHED softirqs (BZ#1990272) * kernel-rt: Make rcu_normal_after_boot writable (BZ#1995431) 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/): 1992731 - CVE-2021-38201 kernel: slab-out-of-bounds access in xdr_set_page_base() in net/sunrpc/xdr.c 6. Package List: Red Hat Enterprise Linux Real Time for NFV (v. 8): Source: kernel-rt-4.18.0-305.17.1.rt7.89.el8_4.src.rpm x86_64: kernel-rt-4.18.0-305.17.1.rt7.89.el8_4.x86_64.rpm kernel-rt-core-4.18.0-305.17.1.rt7.89.el8_4.x86_64.rpm kernel-rt-debug-4.18.0-305.17.1.rt7.89.el8_4.x86_64.rpm kernel-rt-debug-core-4.18.0-305.17.1.rt7.89.el8_4.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-305.17.1.rt7.89.el8_4.x86_64.rpm kernel-rt-debug-devel-4.18.0-305.17.1.rt7.89.el8_4.x86_64.rpm kernel-rt-debug-kvm-4.18.0-305.17.1.rt7.89.el8_4.x86_64.rpm kernel-rt-debug-modules-4.18.0-305.17.1.rt7.89.el8_4.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-305.17.1.rt7.89.el8_4.x86_64.rpm kernel-rt-debuginfo-4.18.0-305.17.1.rt7.89.el8_4.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-305.17.1.rt7.89.el8_4.x86_64.rpm kernel-rt-devel-4.18.0-305.17.1.rt7.89.el8_4.x86_64.rpm kernel-rt-kvm-4.18.0-305.17.1.rt7.89.el8_4.x86_64.rpm kernel-rt-modules-4.18.0-305.17.1.rt7.89.el8_4.x86_64.rpm kernel-rt-modules-extra-4.18.0-305.17.1.rt7.89.el8_4.x86_64.rpm Red Hat Enterprise Linux Real Time (v. 8): Source: kernel-rt-4.18.0-305.17.1.rt7.89.el8_4.src.rpm x86_64: kernel-rt-4.18.0-305.17.1.rt7.89.el8_4.x86_64.rpm kernel-rt-core-4.18.0-305.17.1.rt7.89.el8_4.x86_64.rpm kernel-rt-debug-4.18.0-305.17.1.rt7.89.el8_4.x86_64.rpm kernel-rt-debug-core-4.18.0-305.17.1.rt7.89.el8_4.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-305.17.1.rt7.89.el8_4.x86_64.rpm kernel-rt-debug-devel-4.18.0-305.17.1.rt7.89.el8_4.x86_64.rpm kernel-rt-debug-modules-4.18.0-305.17.1.rt7.89.el8_4.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-305.17.1.rt7.89.el8_4.x86_64.rpm kernel-rt-debuginfo-4.18.0-305.17.1.rt7.89.el8_4.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-305.17.1.rt7.89.el8_4.x86_64.rpm kernel-rt-devel-4.18.0-305.17.1.rt7.89.el8_4.x86_64.rpm kernel-rt-modules-4.18.0-305.17.1.rt7.89.el8_4.x86_64.rpm kernel-rt-modules-extra-4.18.0-305.17.1.rt7.89.el8_4.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-2021-38201 https://access.redhat.com/security/updates/classification/#moderate 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 iQIVAwUBYTd6s9zjgjWX9erEAQhsJw/7BPQlTHcNNA4kV8oZE66GBGAlSsygYAMM EXOGsAnSBnlo76FtwS1EwAfFn8w7JcmaXShils4LEaXMcQuTJ5+KVxzThgHTxg+0 lopfeQvf3ApC1OSMmm62aYSpYosLx4KWlNR7QPgbF9iOQcDi5sr5unfI4NcfVrxP O/9kbiqUQiBXAz5g8M8ddzx49nCC+aYrIV7FF63sAtOy/k6bczaMcC6c+PT5+PC5 EEzcWb6aSThXId3I6YNADTlGUB/7p3VWOjADMQZm3Lft0NfuemdfZD+2NpYirK6M 4T1MpH9gSapbsxfU4yYxHi86+fq/zJISybzB2GnzjprQipCNl/LuVv5Jm1bch8DK BF4mFN6sjwlCLD64A4pvpP8RmhDwSDVw+YdWeubguoJyGpaNUenzOJVmoiUTH7B8 2UJNpV8qJZFA2XjX4wab+I7to9F7OZNlIBfOH1BRm/vdtyr1FDnYefXxnrPdaa6/ lgo4rziDuNR2qdABXQQ911rmRALMhiN5XHiA3NiaUIjbXcF03EVs69m1+iFOKRWX R3Eae+AhVWC6+UjfPWTOdJXZExRZZrOs7LowwcxVcrnAjo5k4dCAWGV2CGiuCO9E GWfDpQ98baMgbZTq48sbxoMx/W3v0ETpzhbxJZS+c/BDtmCWp6u9A2qj+sNUUpGy cePQOFuxlvY= =Rt8R -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://listman.redhat.com/mailman/listinfo/rhsa-announce