-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel-rt security and bug fix update Advisory ID: RHSA-2022:0819-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2022:0819 Issue date: 2022-03-10 CVE Names: CVE-2021-0920 CVE-2021-4154 CVE-2022-0330 CVE-2022-0435 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. 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 for NFV (v. 8) - x86_64 Red Hat Enterprise Linux for Real Time (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: improper initialization of the "flags" member of the new pipe_buffer (CVE-2022-0847) * kernel: Use After Free in unix_gc() which could result in a local privilege escalation (CVE-2021-0920) * kernel: local privilege escalation by exploiting the fsconfig syscall parameter leads to container breakout (CVE-2021-4154) * 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: 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 symbol '__rt_mutex_init' is exported GPL-only in kernel 4.18.0-348.2.1.rt7.132.el8_5 (BZ#2038423) * kernel-rt: update RT source tree to the RHEL-8.5.z3 source tree (BZ#2045589) 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/): 2031930 - CVE-2021-0920 kernel: Use After Free in unix_gc() which could result in a local privilege escalation 2034514 - CVE-2021-4154 kernel: local privilege escalation by exploiting the fsconfig syscall parameter leads to container breakout 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 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 (v. 8): Source: kernel-rt-4.18.0-348.20.1.rt7.150.el8_5.src.rpm x86_64: kernel-rt-4.18.0-348.20.1.rt7.150.el8_5.x86_64.rpm kernel-rt-core-4.18.0-348.20.1.rt7.150.el8_5.x86_64.rpm kernel-rt-debug-4.18.0-348.20.1.rt7.150.el8_5.x86_64.rpm kernel-rt-debug-core-4.18.0-348.20.1.rt7.150.el8_5.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-348.20.1.rt7.150.el8_5.x86_64.rpm kernel-rt-debug-devel-4.18.0-348.20.1.rt7.150.el8_5.x86_64.rpm kernel-rt-debug-kvm-4.18.0-348.20.1.rt7.150.el8_5.x86_64.rpm kernel-rt-debug-modules-4.18.0-348.20.1.rt7.150.el8_5.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-348.20.1.rt7.150.el8_5.x86_64.rpm kernel-rt-debuginfo-4.18.0-348.20.1.rt7.150.el8_5.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-348.20.1.rt7.150.el8_5.x86_64.rpm kernel-rt-devel-4.18.0-348.20.1.rt7.150.el8_5.x86_64.rpm kernel-rt-kvm-4.18.0-348.20.1.rt7.150.el8_5.x86_64.rpm kernel-rt-modules-4.18.0-348.20.1.rt7.150.el8_5.x86_64.rpm kernel-rt-modules-extra-4.18.0-348.20.1.rt7.150.el8_5.x86_64.rpm Red Hat Enterprise Linux for Real Time (v. 8): Source: kernel-rt-4.18.0-348.20.1.rt7.150.el8_5.src.rpm x86_64: kernel-rt-4.18.0-348.20.1.rt7.150.el8_5.x86_64.rpm kernel-rt-core-4.18.0-348.20.1.rt7.150.el8_5.x86_64.rpm kernel-rt-debug-4.18.0-348.20.1.rt7.150.el8_5.x86_64.rpm kernel-rt-debug-core-4.18.0-348.20.1.rt7.150.el8_5.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-348.20.1.rt7.150.el8_5.x86_64.rpm kernel-rt-debug-devel-4.18.0-348.20.1.rt7.150.el8_5.x86_64.rpm kernel-rt-debug-modules-4.18.0-348.20.1.rt7.150.el8_5.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-348.20.1.rt7.150.el8_5.x86_64.rpm kernel-rt-debuginfo-4.18.0-348.20.1.rt7.150.el8_5.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-348.20.1.rt7.150.el8_5.x86_64.rpm kernel-rt-devel-4.18.0-348.20.1.rt7.150.el8_5.x86_64.rpm kernel-rt-modules-4.18.0-348.20.1.rt7.150.el8_5.x86_64.rpm kernel-rt-modules-extra-4.18.0-348.20.1.rt7.150.el8_5.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-2021-4154 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-2022-0492 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 iQIVAwUBYippFNzjgjWX9erEAQhDwRAAjsGfW6qXFI81H8xov/wQnw/PdsUOhzDl ISzJEeXALEQCloLH+UDcgo/wV1es00USfBo1H/SpDc5ahjBWP2pbo8QtIRKT6h/k ord4KsAMGjqWRI+zaGbaFoL0q4okMG9H6r731TnhX06CaLXLui8iUJrQLziHo02t /AihF9dW30/w4tXyKeMc73D1lKHImQQFfJo5xpIo8Mm7+6GFrkne8Z46SKXjjyfG IODAcU3wA0C93bbtR4EHEbenVyVVaE5Phn40vxxF00+AQTHoc5nYpOJbDLI3bi1F GbEKQ5pf0jkScwlfEHtHkmjPk92PA/wV41BhPoJw8oKshH4RRxml4Ps0KldI4NrQ ypmDLZ3CfJ+saFbNLN5BARCiqJavF5A4yszHZ5QuopmC1RJx6/rAuE79KkeB0JvW IOaXPzzc05dCqdyVBvNAu+XpVlTbe+XGBR0LalYYjYWxQSrEYAYQ005mcvEWOPRm QfPSM7eOaAzo9RGrMirTm0Gz9BJ0TbvNGiMmMTpLdb6akx1BQcQ5bpAjUCQN0O7j KIFri0FxflweqZswTchfdbW74VuUyTVaeFYKGhp5hFPV6lFkDUFEFC71ANvPaewE X1Z5Ae0gFMD8w5m5eePHqYuEaL6NHtYctHlBh0ef6mrvsKq9lmxJpdXrZUO+eP4w nEhPbkKSmMY= =CLN6 -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://listman.redhat.com/mailman/listinfo/rhsa-announce