-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel-rt security and bug fix update Advisory ID: RHSA-2021:2169-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:2169 Issue date: 2021-06-01 CVE Names: CVE-2021-3501 CVE-2021-3543 ===================================================================== 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 (v. 8) - x86_64 Red Hat Enterprise Linux Real Time for NFV (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: userspace applications can misuse the KVM API to cause a write of 16 bytes at an offset up to 32 GB from vcpu->run (CVE-2021-3501) * kernel: nitro_enclaves stale file descriptors on failed usercopy (CVE-2021-3543) 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.z0 source tree (BZ#1957489) 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/): 1950136 - CVE-2021-3501 kernel: userspace applications can misuse the KVM API to cause a write of 16 bytes at an offset up to 32 GB from vcpu->run 1953022 - CVE-2021-3543 kernel: nitro_enclaves stale file descriptors on failed usercopy 6. Package List: Red Hat Enterprise Linux Real Time for NFV (v. 8): Source: kernel-rt-4.18.0-305.3.1.rt7.75.el8_4.src.rpm x86_64: kernel-rt-4.18.0-305.3.1.rt7.75.el8_4.x86_64.rpm kernel-rt-core-4.18.0-305.3.1.rt7.75.el8_4.x86_64.rpm kernel-rt-debug-4.18.0-305.3.1.rt7.75.el8_4.x86_64.rpm kernel-rt-debug-core-4.18.0-305.3.1.rt7.75.el8_4.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-305.3.1.rt7.75.el8_4.x86_64.rpm kernel-rt-debug-devel-4.18.0-305.3.1.rt7.75.el8_4.x86_64.rpm kernel-rt-debug-kvm-4.18.0-305.3.1.rt7.75.el8_4.x86_64.rpm kernel-rt-debug-modules-4.18.0-305.3.1.rt7.75.el8_4.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-305.3.1.rt7.75.el8_4.x86_64.rpm kernel-rt-debuginfo-4.18.0-305.3.1.rt7.75.el8_4.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-305.3.1.rt7.75.el8_4.x86_64.rpm kernel-rt-devel-4.18.0-305.3.1.rt7.75.el8_4.x86_64.rpm kernel-rt-kvm-4.18.0-305.3.1.rt7.75.el8_4.x86_64.rpm kernel-rt-modules-4.18.0-305.3.1.rt7.75.el8_4.x86_64.rpm kernel-rt-modules-extra-4.18.0-305.3.1.rt7.75.el8_4.x86_64.rpm Red Hat Enterprise Linux Real Time (v. 8): Source: kernel-rt-4.18.0-305.3.1.rt7.75.el8_4.src.rpm x86_64: kernel-rt-4.18.0-305.3.1.rt7.75.el8_4.x86_64.rpm kernel-rt-core-4.18.0-305.3.1.rt7.75.el8_4.x86_64.rpm kernel-rt-debug-4.18.0-305.3.1.rt7.75.el8_4.x86_64.rpm kernel-rt-debug-core-4.18.0-305.3.1.rt7.75.el8_4.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-305.3.1.rt7.75.el8_4.x86_64.rpm kernel-rt-debug-devel-4.18.0-305.3.1.rt7.75.el8_4.x86_64.rpm kernel-rt-debug-modules-4.18.0-305.3.1.rt7.75.el8_4.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-305.3.1.rt7.75.el8_4.x86_64.rpm kernel-rt-debuginfo-4.18.0-305.3.1.rt7.75.el8_4.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-305.3.1.rt7.75.el8_4.x86_64.rpm kernel-rt-devel-4.18.0-305.3.1.rt7.75.el8_4.x86_64.rpm kernel-rt-modules-4.18.0-305.3.1.rt7.75.el8_4.x86_64.rpm kernel-rt-modules-extra-4.18.0-305.3.1.rt7.75.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-2021-3501 https://access.redhat.com/security/cve/CVE-2021-3543 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 2021 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBYLYBctzjgjWX9erEAQgL6w/9GX9nqaM6DeBkOZmbKCCB1G0PAJge2A3t zZh9Q4q/zjw+Dme81D3hmQ6sxII6qSNxzeJvptpKCJoUOqwNJYVOLQfYMOhJ12dL fpMKXtiHeS+mlz4VjO5OITJmNgc5gDl51Jeu+ZP+JnH7iNJh7kV4UNqYo224HJoV hQ3ljtCsJXoRfJZcrUVnVaBFjp6Kk0aKxUpnq6vEHdVzIS9rF6ml72XTsjziP7oX SxEjmFl+XSNZP91i+79uO8UXloAruh3FSCwhYFGd9vcRby6qhfaJlGqUh7RBm8Kc uCfaNnzWPd/OO42pyPMForsbZh3kphbBsJeO4xCPBk0pBuqidQx78C3lu51hRy0g rhrQyiBGlqKqVnqm4ZIVXnOKgTtDLdo+FhM/XAXTuOGmQyP2F8W+Sdr0BGtiGSSI 0HqRjJOXBghF5Y0Ze/MHpCFLoWSL0J5aG3Si9kOpE2lQDnnR+zQlXtAoHvPosquO kXqrjjeGlgZcXJ6N5+GOPdiNdXhVndnMahlyWVkM8WVVrXB6fsesq9RZJrQf9pA0 I0vmqrkYKMyvdET91Gn9ZxkOwWcjqSOf+KQewCOJJnSJsoxYAtHtqGNC5vueIQBZ Ud9p9voTnqvfN9xF3B5F/JDJADkw7oV7F2TwARVWtLwaHd2DcVnGyHBh7DWoVfcj XmvtSTmlhB0= =ENgI -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://listman.redhat.com/mailman/listinfo/rhsa-announce