-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Important: kernel-rt security and bug fix update Advisory ID: RHSA-2022:5633-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2022:5633 Issue date: 2022-07-19 CVE Names: CVE-2020-29368 CVE-2021-4197 CVE-2021-4203 CVE-2022-1012 CVE-2022-1729 CVE-2022-32250 ==================================================================== 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): * kernel: Small table perturb size in the TCP source port generation algorithm can lead to information leak (CVE-2022-1012) * kernel: race condition in perf_event_open leads to privilege escalation (CVE-2022-1729) * kernel: a use-after-free write in the netfilter subsystem can lead to privilege escalation to root (CVE-2022-32250) * kernel: cgroup: Use open-time creds and namespace for migration perm checks (CVE-2021-4197) * kernel: Race condition in races in sk_peer_pid and sk_peer_cred accesses (CVE-2021-4203) * kernel: the copy-on-write implementation can grant unintended write access because of a race condition in a THP mapcount check (CVE-2020-29368) 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-8.4.z10 source tree (BZ#2087922) 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/): 1903244 - CVE-2020-29368 kernel: the copy-on-write implementation can grant unintended write access because of a race condition in a THP mapcount check 2035652 - CVE-2021-4197 kernel: cgroup: Use open-time creds and namespace for migration perm checks 2036934 - CVE-2021-4203 kernel: Race condition in races in sk_peer_pid and sk_peer_cred accesses 2064604 - CVE-2022-1012 kernel: Small table perturb size in the TCP source port generation algorithm can lead to information leak 2086753 - CVE-2022-1729 kernel: race condition in perf_event_open leads to privilege escalation 2092427 - CVE-2022-32250 kernel: a use-after-free write in the netfilter subsystem can lead to privilege escalation to root 6. Package List: Red Hat Enterprise Linux Real Time for NFV EUS (v.8.4): Source: kernel-rt-4.18.0-305.57.1.rt7.129.el8_4.src.rpm x86_64: kernel-rt-4.18.0-305.57.1.rt7.129.el8_4.x86_64.rpm kernel-rt-core-4.18.0-305.57.1.rt7.129.el8_4.x86_64.rpm kernel-rt-debug-4.18.0-305.57.1.rt7.129.el8_4.x86_64.rpm kernel-rt-debug-core-4.18.0-305.57.1.rt7.129.el8_4.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-305.57.1.rt7.129.el8_4.x86_64.rpm kernel-rt-debug-devel-4.18.0-305.57.1.rt7.129.el8_4.x86_64.rpm kernel-rt-debug-kvm-4.18.0-305.57.1.rt7.129.el8_4.x86_64.rpm kernel-rt-debug-modules-4.18.0-305.57.1.rt7.129.el8_4.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-305.57.1.rt7.129.el8_4.x86_64.rpm kernel-rt-debuginfo-4.18.0-305.57.1.rt7.129.el8_4.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-305.57.1.rt7.129.el8_4.x86_64.rpm kernel-rt-devel-4.18.0-305.57.1.rt7.129.el8_4.x86_64.rpm kernel-rt-kvm-4.18.0-305.57.1.rt7.129.el8_4.x86_64.rpm kernel-rt-modules-4.18.0-305.57.1.rt7.129.el8_4.x86_64.rpm kernel-rt-modules-extra-4.18.0-305.57.1.rt7.129.el8_4.x86_64.rpm Red Hat Enterprise Linux Real Time EUS (v.8.4): Source: kernel-rt-4.18.0-305.57.1.rt7.129.el8_4.src.rpm x86_64: kernel-rt-4.18.0-305.57.1.rt7.129.el8_4.x86_64.rpm kernel-rt-core-4.18.0-305.57.1.rt7.129.el8_4.x86_64.rpm kernel-rt-debug-4.18.0-305.57.1.rt7.129.el8_4.x86_64.rpm kernel-rt-debug-core-4.18.0-305.57.1.rt7.129.el8_4.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-305.57.1.rt7.129.el8_4.x86_64.rpm kernel-rt-debug-devel-4.18.0-305.57.1.rt7.129.el8_4.x86_64.rpm kernel-rt-debug-modules-4.18.0-305.57.1.rt7.129.el8_4.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-305.57.1.rt7.129.el8_4.x86_64.rpm kernel-rt-debuginfo-4.18.0-305.57.1.rt7.129.el8_4.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-305.57.1.rt7.129.el8_4.x86_64.rpm kernel-rt-devel-4.18.0-305.57.1.rt7.129.el8_4.x86_64.rpm kernel-rt-modules-4.18.0-305.57.1.rt7.129.el8_4.x86_64.rpm kernel-rt-modules-extra-4.18.0-305.57.1.rt7.129.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-2020-29368 https://access.redhat.com/security/cve/CVE-2021-4197 https://access.redhat.com/security/cve/CVE-2021-4203 https://access.redhat.com/security/cve/CVE-2022-1012 https://access.redhat.com/security/cve/CVE-2022-1729 https://access.redhat.com/security/cve/CVE-2022-32250 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 iQIVAwUBYuFkGdzjgjWX9erEAQi65g//QXb0sAIh3OyUghYC8TgHyCt9bVMuwwVU TICdIP88M9cZE83SIbkZVfcywHbEnmATvckJ68i+fZeM52aRyvEFpHP/Y90ltf2y YTJ9HR7O7CHOs3otntDzhV0+a8d6vdKdqoB4hL0+CCO+Cn9NfuqXEmDlfuqbefKz Xml7LPaDGehjGf2Rp5Dn2arDXeZQ+3oCqfolHcfuclSkaTTJzNMELXmoAY+Ih6Zv yIRv/5Y+nWhs4lyfhhe2j4QOh4VY1laMJZRofaw5dE2NrYGd1bPPQIJr5CnDtVK0 LOKggN6Lb7IKkXJF6OV3UsF7InYX9TylMA/61qg/ip0+I/vRWkyiSM3LeK5jsIEY 8z48dfuKcWTgB1EhMfRuJNrzDRfa/l/NJnJTBjmhB8r+IweeXNaf8MNkpRZXwK8h ekWZk98g9KfKtkd7VbIJYIfsSFHVFg+aUWn0x3rGecowCYeX1QWCH002P4UgE5+f lapONXhhx4AOPdBKgWqx3EwY2AH2Td+CZGjd0ZCyn3gmkGGUvZlyTADGyVf3YR6k RbkjusxShwmYhVi1BBtUTfpVrvSHuMoxdTnbMuQT9nj8FaaVWQF8DfTfEWJLCSev OQD6354tEhkTkzj6k7rNy4LxEovNDbnN9t4CYnyw6q0DUy6bYZK1u//70DRjyXdw 32dOR6ilBic=Kn8q -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://listman.redhat.com/mailman/listinfo/rhsa-announce