-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Important: kernel-rt security and bug fix update Advisory ID: RHSA-2022:0187-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2022:0187 Issue date: 2022-01-19 CVE Names: CVE-2021-4154 CVE-2021-4155 CVE-2022-0185 ==================================================================== 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: local privilege escalation by exploiting the fsconfig syscall parameter leads to container breakout (CVE-2021-4154) * kernel: xfs: raw block device data leak in XFS_IOC_ALLOCSP IOCTL (CVE-2021-4155) * kernel: fs_context: heap overflow in legacy parameter handling (CVE-2022-0185) 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): * kernnel-rt-debug: do not call blocking ops when !TASK_RUNNING; state=1 set at [<0000000050e86018>] handle_userfault+0x530/0x1820 (BZ#2029421) * kernel-rt: update RT source tree to the RHEL-8.4.z6 source tree (BZ#2029592) 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/): 2034514 - CVE-2021-4154 kernel: local privilege escalation by exploiting the fsconfig syscall parameter leads to container breakout 2034813 - CVE-2021-4155 kernel: xfs: raw block device data leak in XFS_IOC_ALLOCSP IOCTL 2040358 - CVE-2022-0185 kernel: fs_context: heap overflow in legacy parameter handling 6. Package List: Red Hat Enterprise Linux Real Time for NFV EUS (v.8.4): Source: kernel-rt-4.18.0-305.34.2.rt7.107.el8_4.src.rpm x86_64: kernel-rt-4.18.0-305.34.2.rt7.107.el8_4.x86_64.rpm kernel-rt-core-4.18.0-305.34.2.rt7.107.el8_4.x86_64.rpm kernel-rt-debug-4.18.0-305.34.2.rt7.107.el8_4.x86_64.rpm kernel-rt-debug-core-4.18.0-305.34.2.rt7.107.el8_4.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-305.34.2.rt7.107.el8_4.x86_64.rpm kernel-rt-debug-devel-4.18.0-305.34.2.rt7.107.el8_4.x86_64.rpm kernel-rt-debug-kvm-4.18.0-305.34.2.rt7.107.el8_4.x86_64.rpm kernel-rt-debug-modules-4.18.0-305.34.2.rt7.107.el8_4.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-305.34.2.rt7.107.el8_4.x86_64.rpm kernel-rt-debuginfo-4.18.0-305.34.2.rt7.107.el8_4.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-305.34.2.rt7.107.el8_4.x86_64.rpm kernel-rt-devel-4.18.0-305.34.2.rt7.107.el8_4.x86_64.rpm kernel-rt-kvm-4.18.0-305.34.2.rt7.107.el8_4.x86_64.rpm kernel-rt-modules-4.18.0-305.34.2.rt7.107.el8_4.x86_64.rpm kernel-rt-modules-extra-4.18.0-305.34.2.rt7.107.el8_4.x86_64.rpm Red Hat Enterprise Linux Real Time EUS (v.8.4): Source: kernel-rt-4.18.0-305.34.2.rt7.107.el8_4.src.rpm x86_64: kernel-rt-4.18.0-305.34.2.rt7.107.el8_4.x86_64.rpm kernel-rt-core-4.18.0-305.34.2.rt7.107.el8_4.x86_64.rpm kernel-rt-debug-4.18.0-305.34.2.rt7.107.el8_4.x86_64.rpm kernel-rt-debug-core-4.18.0-305.34.2.rt7.107.el8_4.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-305.34.2.rt7.107.el8_4.x86_64.rpm kernel-rt-debug-devel-4.18.0-305.34.2.rt7.107.el8_4.x86_64.rpm kernel-rt-debug-modules-4.18.0-305.34.2.rt7.107.el8_4.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-305.34.2.rt7.107.el8_4.x86_64.rpm kernel-rt-debuginfo-4.18.0-305.34.2.rt7.107.el8_4.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-305.34.2.rt7.107.el8_4.x86_64.rpm kernel-rt-devel-4.18.0-305.34.2.rt7.107.el8_4.x86_64.rpm kernel-rt-modules-4.18.0-305.34.2.rt7.107.el8_4.x86_64.rpm kernel-rt-modules-extra-4.18.0-305.34.2.rt7.107.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-2021-4154 https://access.redhat.com/security/cve/CVE-2021-4155 https://access.redhat.com/security/cve/CVE-2022-0185 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 iQIVAwUBYehHwNzjgjWX9erEAQiEgQ//XFMRdCw5LkocXX/SACupS2bHOzUtU9QW S2QZ0oKC3IERvHDXO273qPTMEfhiM1gShIDv+T+25MTrRbizi/C8Me9/fA8mU5Y3 h+D/2KyMYqSeyNoRu/LH1pBMFrZ1yxAVu7R3ceJ0TLFWrDwZc4WZ3G948OvNRulz duPhjew6l4kYpSw93O4iK3BZVY/+cIlZsgj8jz7H+SQPzDpowGLCQnMBcMAbl+Q1 3Q3STTbmIENw8IOB0ueSG8NPv2V6McXqxjsg6ptV1dWQ3Fh1cPQV0Tfrubx642bv WwGqTEY88GZ2eaFsYbnX2AF9kfESYlbIz3e3ZiAwY4BJj08wNaUaS8v/X//6QhKh qYviPv4QXGeRGP26M00mmYDd8RG985A0BFUclf4pb/8HZ/KvcHO0DVvks9FA2kHN DhuiXQt7mZcsqqJxqgpD3z2ttdGGuja8rmsbO30qaJ4Mb9oEUYRMCHBCSYirPjwq goTBUrn6M4jFAtS6mjPxD9J6NM0XSe/E3c3WoWl7Jti4fYduR0bwbiGkZSiyUQou ax/lAOfrQvRvFv6CP5QJNGTu5WNIaaZEZVZireb2n+463e10y2AIRxqmjooFgRZS dLw1VZw4GeCBi+XGBlvnCWlEcvnduiLzCWFbM1mcp6YFrESyH1mCnSoh3ZzY+Lz+ tcOse/tus60=qI6w -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://listman.redhat.com/mailman/listinfo/rhsa-announce