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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2023.1959 kernel-rt security and bug fix update 5 April 2023 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kernel-rt Publisher: Red Hat Operating System: Red Hat Resolution: Patch/Upgrade CVE Names: CVE-2023-0461 CVE-2023-0266 Original Bulletin: https://access.redhat.com/errata/RHSA-2023:1556 Comment: CVSS (Max): 7.8 CVE-2023-0461 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) CVSS Source: Red Hat Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel-rt security and bug fix update Advisory ID: RHSA-2023:1556-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2023:1556 Issue date: 2023-04-04 CVE Names: CVE-2023-0266 CVE-2023-0461 ===================================================================== 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): * ALSA: pcm: Move rwsem lock inside snd_ctl_elem_read to prevent UAF (CVE-2023-0266) * kernel: net/ulp: use-after-free in listening ULP sockets (CVE-2023-0461) 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 RHEL-8.4: disable KASAN, KCSAN and UBSAN for kernel-rt (BZ#2165124) * kernel-rt: update RT source tree to the RHEL-8.4.z16 source tree (async) (BZ#2183403) 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/): 2163379 - CVE-2023-0266 ALSA: pcm: Move rwsem lock inside snd_ctl_elem_read to prevent UAF 2176192 - CVE-2023-0461 kernel: net/ulp: use-after-free in listening ULP sockets 6. Package List: Red Hat Enterprise Linux Real Time for NFV EUS (v.8.4): Source: kernel-rt-4.18.0-305.86.2.rt7.160.el8_4.src.rpm x86_64: kernel-rt-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm kernel-rt-core-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm kernel-rt-debug-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm kernel-rt-debug-core-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm kernel-rt-debug-devel-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm kernel-rt-debug-kvm-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm kernel-rt-debug-modules-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm kernel-rt-debuginfo-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm kernel-rt-devel-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm kernel-rt-kvm-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm kernel-rt-modules-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm kernel-rt-modules-extra-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm Red Hat Enterprise Linux Real Time EUS (v.8.4): Source: kernel-rt-4.18.0-305.86.2.rt7.160.el8_4.src.rpm x86_64: kernel-rt-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm kernel-rt-core-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm kernel-rt-debug-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm kernel-rt-debug-core-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm kernel-rt-debug-devel-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm kernel-rt-debug-modules-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm kernel-rt-debuginfo-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm kernel-rt-devel-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm kernel-rt-modules-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm kernel-rt-modules-extra-4.18.0-305.86.2.rt7.160.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-2023-0266 https://access.redhat.com/security/cve/CVE-2023-0461 https://access.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2023 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBZCvqnNzjgjWX9erEAQji3hAAiJOllK9VciQkxLUO2WiKQB4mig+cDp8n 1Zm4g3/zeZMyYPoLFK5UjqlGNx2Ir+JowUkNqZz0jLibhu1WgArykSeUPnilRbA+ Sq/EDfTF8inG+j39aynJPRIaalHGvW6wYpSuQU/moA9bPUdNvY8G5A0d/gJZAsuc SYbc5ylut7aZXaHeI7oDkdQw/udJJcmuD/+HORP8JLQeNvnb8UJmrMU0hgsoqhr6 nl3FfYUdiR5vriZNIbxeNS9PD7K+MPsEkW51xPYkw7CzpXMfgG8otZLTwQBOuS9P bIJicxp3Zhg2W5ho5pO0DjKPlaHlBX88QYx5VNlxM/KN9unESDI1KhChEUva9+Ck 97iU7CfAZgDWJ2PMPyW3cS9Og3Efep9kW05OLWo/K7rrQlEiZ/4n/DhLxHnUSGhK tTUkFb/4fXXeTQ+HTBEuWGq7SGDgMsHRmpQOEXVwrqkatTgwaQ5t2r6ka6+QQzra h2D8/VRuo0jgswN2ftM/4kHvLvh97/Rgy/W4yy3FENu6Bem8MvVaSG2QiGoKLZZH bNXFzHNoEX7FeYwagGm8s2R7vhzm6LO0XV0uh+2lY0iXU0/6moYRzK0PmN+fIGJS eU7Oh0VUxkKKb9AQO4EEraQcuEuw7HQpZSG13M17h977KJU6kBmDWZ0pzLX+VMYd V88Bo6k9bAs= =ZtTu - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: https://auscert.org.au/gpg-key/ iQIVAwUBZCzKfskNZI30y1K9AQi1ZA/9GMYfKoCnEK21RwklMop9vPadDtY4PBsM PkVp4+xs8XjXK3twXppS4d833lvqt/5YYIZHtkuL2VrguhDYK5h1tAL6UgZ5O24X jxWWVeiiOhQT58UXw4jNAjllaRXHFvB0LYCbWxWRZ/8rxbWtle/5JYSLywMSzJXH zdLsKfdMjp82W0aFZouoSbkM1t/OdL+KTl45yuPipm72E4baow/+AESO2/zl1aMi rwwWIsgvmRInaFA3h2GAjm9H5guy6a2sE4TlQLKzhwxISFzFTlZGBBO47d2PC4Hx 9VoRbc7bOzJfAeVcEVXlkth9pxiJM3ABW8PFjBgUMCfiDj11y9rqi6k2fbnAgqX9 ZewDlheKfeI9GxwKc/ePsOLoENoh6r9cxJnpQsnCwYzhdfErvtZLa9bie24H7MB8 BYmS0NFkun06QgLma8XwMmInlq3BvpfU6lpuZ70mv9QNyGo4KX7B6MEpVsLZwMGs SCXkShUTpKUMfiEpVtUR1+bGBUauDZPKHfWwGQLjq0dtkPKyE0JR0F8/sWzN4dAa GUUh00K0fmlBxkrIF/WI4Vyuw3+DVqKwzay573jCfe3HGXgBes4mRFSTO5wvP/bZ uNljrYgO/8DwxU7NSKbm9AbGiPqzCfgjPeMouMTqV242PCEjiyxhTvcyUY6DwBLa A4jLKuHa5QI= =c8oi -----END PGP SIGNATURE-----