-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Important: kernel-rt security and bug fix update Advisory ID: RHSA-2022:0821-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2022:0821 Issue date: 2022-03-10 CVE Names: CVE-2021-4083 CVE-2022-0330 CVE-2022-0492 CVE-2022-0847 CVE-2022-22942 ==================================================================== 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: improper initialization of the "flags" member of the new pipe_buffer (CVE-2022-0847) * kernel: fget: check that the fd still exists after getting a ref to it (CVE-2021-4083) * kernel: possible privileges escalation due to missing TLB flush (CVE-2022-0330) * kernel: cgroups v1 release_agent feature may allow privilege escalation (CVE-2022-0492) * kernel: failing usercopy allows for use-after-free exploitation (CVE-2022-22942) 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.z16 Batch (BZ#2057698) 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/): 2029923 - CVE-2021-4083 kernel: fget: check that the fd still exists after getting a ref to it 2042404 - CVE-2022-0330 kernel: possible privileges escalation due to missing TLB flush 2044809 - CVE-2022-22942 kernel: failing usercopy allows for use-after-free exploitation 2051505 - CVE-2022-0492 kernel: cgroups v1 release_agent feature may allow privilege escalation 2060795 - CVE-2022-0847 kernel: improper initialization of the "flags" member of the new pipe_buffer 6. Package List: Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2): Source: kernel-rt-4.18.0-193.79.1.rt13.129.el8_2.src.rpm x86_64: kernel-rt-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm kernel-rt-core-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm kernel-rt-debug-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm kernel-rt-debug-core-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm kernel-rt-debug-devel-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm kernel-rt-debug-kvm-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm kernel-rt-debug-modules-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm kernel-rt-debuginfo-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm kernel-rt-devel-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm kernel-rt-kvm-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm kernel-rt-modules-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm kernel-rt-modules-extra-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm Red Hat Enterprise Linux Real Time EUS (v. 8.2): Source: kernel-rt-4.18.0-193.79.1.rt13.129.el8_2.src.rpm x86_64: kernel-rt-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm kernel-rt-core-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm kernel-rt-debug-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm kernel-rt-debug-core-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm kernel-rt-debug-devel-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm kernel-rt-debug-modules-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm kernel-rt-debuginfo-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm kernel-rt-devel-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm kernel-rt-modules-4.18.0-193.79.1.rt13.129.el8_2.x86_64.rpm kernel-rt-modules-extra-4.18.0-193.79.1.rt13.129.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-2021-4083 https://access.redhat.com/security/cve/CVE-2022-0330 https://access.redhat.com/security/cve/CVE-2022-0492 https://access.redhat.com/security/cve/CVE-2022-0847 https://access.redhat.com/security/cve/CVE-2022-22942 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/security/vulnerabilities/RHSB-2022-002 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 iQIVAwUBYippk9zjgjWX9erEAQioHQ//aOK91fuHXKUshQ0tyCtRMbiMIkkqjr/6 nlb46svULcwrygX07N/TntlSIBvpoCtzsaL/1lFzsfc9U4M/Fe/VXyeMZHfhndwF hPOen+B6VceaviFpyjx1WzikOQNGEV9iCpR1tHE0Kz/jWr3qH5dgoNcDQwu4aD35 +XsilsHpS/rPH04J09je/xYFzhUQkoNYcHioxFVVQMFssveVefyVc1VGWEW+YZ6f JzD4ZHoKDdM5FqqCVazkPs2acBDmKsxc77Lz1LYrPR3HcDYC7joLiTuzs5kqNb/X AJgY2IMyYGoRD5hn7tz9z1IXA88AO8b0mEWJQB3om33z+XiAnmVsQ2SmNdpr/IHH m7psfr58pOauUYXmOr4Cd3fSwEBeue+F5avHmu7WYq4hwLbqWSre4zfeg973jDPI TS1WE/NbO3K/KQ6SelrLR85u0lzt9of6miptBmESdA4AaXuVmLkp4vizI4xamMUH WshQ3vBKdFaKnkoWobGZWYcC2IG+Zcy8bIAXVAjC8Ua5nxyQ9pvtmJbJv2iZSa4K QVlQociE+pXDNUHWP3JvyIBb4d1yeuiUKGX4EX/YXtHk4jhYd2Y66ESbVmmNUbgI egnaQtIGYFsM+D9G1GwDuNNL3eeSRGXcxHqMmymwLrRZ3TdouR2NeSAlTyzCvK9n 2fFeV6NMYpw=ymtx -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://listman.redhat.com/mailman/listinfo/rhsa-announce