-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Important: kernel-rt security and bug fix update Advisory ID: RHSA-2022:6991-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2022:6991 Issue date: 2022-10-18 CVE Names: CVE-2021-45485 CVE-2021-45486 CVE-2022-2588 CVE-2022-21123 CVE-2022-21125 CVE-2022-21166 ==================================================================== 1. Summary: An update for kernel-rt is now available for Red Hat Enterprise Linux 8.4 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.8.4) - x86_64 Red Hat Enterprise Linux Real Time for NFV EUS (v.8.4) - 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): * A use-after-free in cls_route filter implementation may lead to privilege escalation (CVE-2022-2588) * Information leak in the IPv6 implementation (CVE-2021-45485) * Information leak in the IPv4 implementation (CVE-2021-45486) * Incomplete cleanup of multi-core shared buffers (aka SBDR) (CVE-2022-21123) * Incomplete cleanup of microarchitectural fill buffers (aka SBDS) (CVE-2022-21125) * Incomplete cleanup in specific special register write operations (aka DRPW) (CVE-2022-21166) 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): * update RT source tree to the RHEL-8.4.z12 source tree (BZ#2119160) * using __this_cpu_add() in preemptible [00000000] - caller is __mod_memcg_lruvec_state+0x69/0x1c0 [None8.4.0.z] (BZ#2124454) 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/): 2039911 - CVE-2021-45485 kernel: information leak in the IPv6 implementation 2039914 - CVE-2021-45486 kernel: information leak in the IPv4 implementation 2090237 - CVE-2022-21123 hw: cpu: Incomplete cleanup of multi-core shared buffers (aka SBDR) 2090240 - CVE-2022-21125 hw: cpu: Incomplete cleanup of microarchitectural fill buffers (aka SBDS) 2090241 - CVE-2022-21166 hw: cpu: Incomplete cleanup in specific special register write operations (aka DRPW) 2114849 - CVE-2022-2588 kernel: a use-after-free in cls_route filter implementation may lead to privilege escalation 6. Package List: Red Hat Enterprise Linux Real Time for NFV EUS (v.8.4): Source: kernel-rt-4.18.0-305.65.1.rt7.137.el8_4.src.rpm x86_64: kernel-rt-4.18.0-305.65.1.rt7.137.el8_4.x86_64.rpm kernel-rt-core-4.18.0-305.65.1.rt7.137.el8_4.x86_64.rpm kernel-rt-debug-4.18.0-305.65.1.rt7.137.el8_4.x86_64.rpm kernel-rt-debug-core-4.18.0-305.65.1.rt7.137.el8_4.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-305.65.1.rt7.137.el8_4.x86_64.rpm kernel-rt-debug-devel-4.18.0-305.65.1.rt7.137.el8_4.x86_64.rpm kernel-rt-debug-kvm-4.18.0-305.65.1.rt7.137.el8_4.x86_64.rpm kernel-rt-debug-modules-4.18.0-305.65.1.rt7.137.el8_4.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-305.65.1.rt7.137.el8_4.x86_64.rpm kernel-rt-debuginfo-4.18.0-305.65.1.rt7.137.el8_4.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-305.65.1.rt7.137.el8_4.x86_64.rpm kernel-rt-devel-4.18.0-305.65.1.rt7.137.el8_4.x86_64.rpm kernel-rt-kvm-4.18.0-305.65.1.rt7.137.el8_4.x86_64.rpm kernel-rt-modules-4.18.0-305.65.1.rt7.137.el8_4.x86_64.rpm kernel-rt-modules-extra-4.18.0-305.65.1.rt7.137.el8_4.x86_64.rpm Red Hat Enterprise Linux Real Time EUS (v.8.4): Source: kernel-rt-4.18.0-305.65.1.rt7.137.el8_4.src.rpm x86_64: kernel-rt-4.18.0-305.65.1.rt7.137.el8_4.x86_64.rpm kernel-rt-core-4.18.0-305.65.1.rt7.137.el8_4.x86_64.rpm kernel-rt-debug-4.18.0-305.65.1.rt7.137.el8_4.x86_64.rpm kernel-rt-debug-core-4.18.0-305.65.1.rt7.137.el8_4.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-305.65.1.rt7.137.el8_4.x86_64.rpm kernel-rt-debug-devel-4.18.0-305.65.1.rt7.137.el8_4.x86_64.rpm kernel-rt-debug-modules-4.18.0-305.65.1.rt7.137.el8_4.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-305.65.1.rt7.137.el8_4.x86_64.rpm kernel-rt-debuginfo-4.18.0-305.65.1.rt7.137.el8_4.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-305.65.1.rt7.137.el8_4.x86_64.rpm kernel-rt-devel-4.18.0-305.65.1.rt7.137.el8_4.x86_64.rpm kernel-rt-modules-4.18.0-305.65.1.rt7.137.el8_4.x86_64.rpm kernel-rt-modules-extra-4.18.0-305.65.1.rt7.137.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-2021-45485 https://access.redhat.com/security/cve/CVE-2021-45486 https://access.redhat.com/security/cve/CVE-2022-2588 https://access.redhat.com/security/cve/CVE-2022-21123 https://access.redhat.com/security/cve/CVE-2022-21125 https://access.redhat.com/security/cve/CVE-2022-21166 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 2022 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBY06+2NzjgjWX9erEAQjyAhAAg7yjSCXHL+nyuKbvoQPZpsmeahSSEbMu adR5+jpvA0onjw/5yu8F2ptCCs1upcGGyBy42bmvv83KzphlqjQKklLNeiXPJGoE R7qz1JK5DyNCm1y8wrqb7Z9l3GDFfZ5hcQURGJgfbzUw+WYBFA2Ar5EVsDXLOTc6 uPnfXrTNTd7zpiLn68rpG223A6EtY8+iUSZDpGlijvnSgUPX+vtm0ku94uhe1lEX jCziNjfdKfGkh78e/iUuZW3+wYsmpk3/y3344MaSohn+q7J6FjVBbhc16l35rYqc QgfOgBaoTYkPea+a7eAC/3l9gHAdeMunwGHKZZwRHjD6qnR84fTwyE9OqIsga3id VnXQ2wB1rbaQ7R+ymboNsaD6bQJQ26U0Xqgo6cLXDnJ4vRCGqiaNs3IZVu4Npsuf TVDK4Y95J3H9rEVoTJoEv/S59aQiQAYXBDJ7fcAr2YoFWyztKbr1/4v5rTbLfA9J HY5geMYGCY4NNHi5JWDypPG7oCUu5MNFwDqGS0k88CSPYGDgabVBeJgbKx4PdkUX m3GRLycKC7pQ0ywERVRDEYwBTED7M9BqWyVJBANEKkkB2/1YrK53PszFFrYpxhuj bjID1FQVwCZmU77y3FeSuKPxem63YLQ5cC2DTrLzN3bJMpxwcL6g6vbU4gugtvW/ vvdNuHvzsKA=urYL -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://listman.redhat.com/mailman/listinfo/rhsa-announce