-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel-rt security and bug fix update Advisory ID: RHSA-2022:0771-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2022:0771 Issue date: 2022-03-08 CVE Names: CVE-2021-0920 CVE-2021-4028 CVE-2022-0330 CVE-2022-0435 CVE-2022-22942 ===================================================================== 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: Use After Free in unix_gc() which could result in a local privilege escalation (CVE-2021-0920) * kernel: use-after-free in RDMA listen() (CVE-2021-4028) * kernel: possible privileges escalation due to missing TLB flush (CVE-2022-0330) * kernel: remote stack overflow via kernel panic on systems using TIPC may lead to DoS (CVE-2022-0435) * 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 RHEL-8.4.z7 source tree (BZ#2042461) 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/): 2027201 - CVE-2021-4028 kernel: use-after-free in RDMA listen() 2031930 - CVE-2021-0920 kernel: Use After Free in unix_gc() which could result in a local privilege escalation 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 2048738 - CVE-2022-0435 kernel: remote stack overflow via kernel panic on systems using TIPC may lead to DoS 6. Package List: Red Hat Enterprise Linux Real Time for NFV EUS (v.8.4): Source: kernel-rt-4.18.0-305.40.1.rt7.112.el8_4.src.rpm x86_64: kernel-rt-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-core-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-debug-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-debug-core-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-debug-devel-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-debug-kvm-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-debug-modules-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-debuginfo-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-devel-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-kvm-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-modules-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-modules-extra-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm Red Hat Enterprise Linux Real Time EUS (v.8.4): Source: kernel-rt-4.18.0-305.40.1.rt7.112.el8_4.src.rpm x86_64: kernel-rt-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-core-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-debug-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-debug-core-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-debug-devel-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-debug-modules-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-debuginfo-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-devel-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-modules-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-modules-extra-4.18.0-305.40.1.rt7.112.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-2021-0920 https://access.redhat.com/security/cve/CVE-2021-4028 https://access.redhat.com/security/cve/CVE-2022-0330 https://access.redhat.com/security/cve/CVE-2022-0435 https://access.redhat.com/security/cve/CVE-2022-22942 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 iQIVAwUBYifGF9zjgjWX9erEAQjkKA//aph4wwEsif3n/YvxUdt9MGoYmjv+5gog PH93cLd18jbNMl/RElEfQzqals6+FKeqTEIfbQhb4kizAky/VG8o6fTsG51erHdz nn3BQ1bfsPtOHntyJ8mPqZgk7EFSu7G6zraH80idrcTdzcyAXEApx47s4KPSuUnF jLxxOjoDTEiasumB0ZlTL0PZ1YT5Stbg0hokQoSHmupqHSahCm3xrYTo2UcDi/Ow 7X/eSizkH0Nbsy+YVinqAH4zQV3s+GMs37o9czGwpGNyQmKjebS+9MhK0CrA5gLT pn8g0BjkarcHs2kX7z+jEQxXDiVhcF3l8qjMJ/s0PQBC4FB6j2BmzQY3Und7wCll +7Wtx22n4ugc1N3WzOH07niofa7CmfZN5bFwSdcW3vzvgfE5by42zZ2ohN9TecHr x7jgSJHiLoJd17becO0ryBcxxhoiAu6GC0/KI5ysiLCUyLoQEyFb11oawONTXDeF wIfFLHKqu0EOk7CgHczOtv1l/Ybj3+U3CXBfYonYH4L77jhlBI7vigRf8YnQzwDM YQZQ3xYPczTAq2mnOC5kv/k4jz4VzFwTFDa/mnGH9/mo/92xz61FbEpBlyvfvVjL NStyojJzbxaKv6iq07UcW4zbKi7fR3OBA+pauSRMJXRt6DT6MffnYWN6D6s8RXRX SrkNbf/zdzU= =aKYE -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://listman.redhat.com/mailman/listinfo/rhsa-announce