-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel-alt security and bug fix update Advisory ID: RHSA-2018:1374-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2018:1374 Issue date: 2018-05-14 CVE Names: CVE-2018-1000199 ===================================================================== 1. Summary: An update for kernel-alt is now available for Red Hat Enterprise Linux 7. 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 for ARM and IBM Power LE (POWER9) Server (v. 7) - aarch64, noarch, ppc64le, s390x Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) - aarch64, noarch, ppc64le 3. Description: The kernel-alt packages provide the Linux kernel version 4.x. Security Fix(es): * kernel: ptrace() incorrect error handling leads to corruption and DoS (CVE-2018-1000199) For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section. Red Hat would like to thank Andy Lutomirski for reporting this issue. Bug Fix(es): * Previously, the nfs_commit_inode() function did not respect the FLUSH_SYNC argument and exited even if there were already the in-flight COMMIT requests. As a consequence, the mmap() system call occasionally returned the EBUSY error on NFS, and CPU soft lockups occurred during a writeback on NFS. This update fixes nfs_commit_inode() to respect FLUSH_SYNC. As a result, mmap() does not return EBUSY, and the CPU soft lockups no longer occur during NFS writebacks. (BZ#1559869) * Recent IBM z Systems hardware contains an extension to the time-of-day clock that ensures it will be operational after the year 2042 by avoiding an overflow that would happen without it. However, the KVM hypervisor was previously unable to handle the extension correctly, which lead to guests freezing if their kernel supported the time-of-day clock extension. This update adds support for the extension to the KVM hypervisor, and KVM guests which support it no longer freeze. (BZ#1559871) * This update provides the ability to disable the "RFI Flush" mitigation mechanism for the Meltdown vulnerability (CVE-2017-5754) in the kernel. The patches that mitigate the effect of Meltdown may have negative impact on performance when the mechanism they provide is enabled, and at the same time your systems may not need this mitigation if they are secured by other means. The vulnerability mitigation remains enabled by default and must be disabled manually; this restores system performance to original levels, but the system then also remains vulnerable to Meltdown. Instructions describing how to disable RFI Flush, as well as additional information, is provided in the following Red Hat Knowledgebase article: https://access.redhat.com/articles/3311301 (BZ#1561463) 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/): 1568477 - CVE-2018-1000199 kernel: ptrace() incorrect error handling leads to corruption and DoS 6. Package List: Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7): Source: kernel-alt-4.14.0-49.2.2.el7a.src.rpm aarch64: kernel-4.14.0-49.2.2.el7a.aarch64.rpm kernel-debug-4.14.0-49.2.2.el7a.aarch64.rpm kernel-debug-debuginfo-4.14.0-49.2.2.el7a.aarch64.rpm kernel-debug-devel-4.14.0-49.2.2.el7a.aarch64.rpm kernel-debuginfo-4.14.0-49.2.2.el7a.aarch64.rpm kernel-debuginfo-common-aarch64-4.14.0-49.2.2.el7a.aarch64.rpm kernel-devel-4.14.0-49.2.2.el7a.aarch64.rpm kernel-headers-4.14.0-49.2.2.el7a.aarch64.rpm kernel-tools-4.14.0-49.2.2.el7a.aarch64.rpm kernel-tools-debuginfo-4.14.0-49.2.2.el7a.aarch64.rpm kernel-tools-libs-4.14.0-49.2.2.el7a.aarch64.rpm perf-4.14.0-49.2.2.el7a.aarch64.rpm perf-debuginfo-4.14.0-49.2.2.el7a.aarch64.rpm python-perf-4.14.0-49.2.2.el7a.aarch64.rpm python-perf-debuginfo-4.14.0-49.2.2.el7a.aarch64.rpm noarch: kernel-abi-whitelists-4.14.0-49.2.2.el7a.noarch.rpm kernel-doc-4.14.0-49.2.2.el7a.noarch.rpm ppc64le: kernel-4.14.0-49.2.2.el7a.ppc64le.rpm kernel-bootwrapper-4.14.0-49.2.2.el7a.ppc64le.rpm kernel-debug-4.14.0-49.2.2.el7a.ppc64le.rpm kernel-debug-debuginfo-4.14.0-49.2.2.el7a.ppc64le.rpm kernel-debuginfo-4.14.0-49.2.2.el7a.ppc64le.rpm kernel-debuginfo-common-ppc64le-4.14.0-49.2.2.el7a.ppc64le.rpm kernel-devel-4.14.0-49.2.2.el7a.ppc64le.rpm kernel-headers-4.14.0-49.2.2.el7a.ppc64le.rpm kernel-tools-4.14.0-49.2.2.el7a.ppc64le.rpm kernel-tools-debuginfo-4.14.0-49.2.2.el7a.ppc64le.rpm kernel-tools-libs-4.14.0-49.2.2.el7a.ppc64le.rpm perf-4.14.0-49.2.2.el7a.ppc64le.rpm perf-debuginfo-4.14.0-49.2.2.el7a.ppc64le.rpm python-perf-4.14.0-49.2.2.el7a.ppc64le.rpm python-perf-debuginfo-4.14.0-49.2.2.el7a.ppc64le.rpm s390x: kernel-4.14.0-49.2.2.el7a.s390x.rpm kernel-debug-4.14.0-49.2.2.el7a.s390x.rpm kernel-debug-debuginfo-4.14.0-49.2.2.el7a.s390x.rpm kernel-debug-devel-4.14.0-49.2.2.el7a.s390x.rpm kernel-debuginfo-4.14.0-49.2.2.el7a.s390x.rpm kernel-debuginfo-common-s390x-4.14.0-49.2.2.el7a.s390x.rpm kernel-devel-4.14.0-49.2.2.el7a.s390x.rpm kernel-headers-4.14.0-49.2.2.el7a.s390x.rpm kernel-kdump-4.14.0-49.2.2.el7a.s390x.rpm kernel-kdump-debuginfo-4.14.0-49.2.2.el7a.s390x.rpm kernel-kdump-devel-4.14.0-49.2.2.el7a.s390x.rpm perf-4.14.0-49.2.2.el7a.s390x.rpm perf-debuginfo-4.14.0-49.2.2.el7a.s390x.rpm python-perf-4.14.0-49.2.2.el7a.s390x.rpm python-perf-debuginfo-4.14.0-49.2.2.el7a.s390x.rpm Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7): aarch64: kernel-debug-debuginfo-4.14.0-49.2.2.el7a.aarch64.rpm kernel-debuginfo-4.14.0-49.2.2.el7a.aarch64.rpm kernel-debuginfo-common-aarch64-4.14.0-49.2.2.el7a.aarch64.rpm kernel-tools-debuginfo-4.14.0-49.2.2.el7a.aarch64.rpm kernel-tools-libs-devel-4.14.0-49.2.2.el7a.aarch64.rpm perf-debuginfo-4.14.0-49.2.2.el7a.aarch64.rpm python-perf-debuginfo-4.14.0-49.2.2.el7a.aarch64.rpm noarch: kernel-doc-4.14.0-49.2.2.el7a.noarch.rpm ppc64le: kernel-debug-debuginfo-4.14.0-49.2.2.el7a.ppc64le.rpm kernel-debug-devel-4.14.0-49.2.2.el7a.ppc64le.rpm kernel-debuginfo-4.14.0-49.2.2.el7a.ppc64le.rpm kernel-debuginfo-common-ppc64le-4.14.0-49.2.2.el7a.ppc64le.rpm kernel-tools-debuginfo-4.14.0-49.2.2.el7a.ppc64le.rpm kernel-tools-libs-devel-4.14.0-49.2.2.el7a.ppc64le.rpm perf-debuginfo-4.14.0-49.2.2.el7a.ppc64le.rpm python-perf-debuginfo-4.14.0-49.2.2.el7a.ppc64le.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-2018-1000199 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/security/cve/CVE-2018-1000199 https://access.redhat.com/articles/3311301 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2018 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBWvsGNdzjgjWX9erEAQgQfg//az+D1Dj+6IHI5y0Yd9RiOc/N8Mo1m5JL ZH+ij/rJFcL+DbUbJozqoOgSTl6AkLoSjM41IW8Q7EJ4LlWehdDl0ys6tjISfUEh /Nh5vocz14gS1MCDqLMVF35dvFlG3JiAw0cj3pu+SuQI6EL75WnaxpGUAsINEuoT 17acvui3u3/sQBCWVMffHIhQar2OdOHwDXqQj5A3fHM5aSytexN63JvlnFXnt5Bi U1cEcRoj90rDm7JEYQWOe+9siqQsUHH59N1/mpYc5kFoz50KOonnRiWFo1phG0sr 3Qv07FDfKZfYb27sJDmaO+HyV2lqyeOVdexxyQGXkiXCBKrYxR5uRtZ4SoBt9OjM 68+jpCf9WnqFYvD4XTt721Ta5JADIJxvc3Ud+cSsYYnEIyDdLtD9zAZqs//BApKt AXdPEm72VOt4BKKvRZDLnslqRVzqLi2T/nIK9vIHVkNtS9K5t4p5zutLni0UpOBa MS0FdDqYD3l2NaNGGqgTxxpP7gYvvxJEqaq5TNiIhGUo11gYIusxVrG6u7aPnOrs SZwvQCkgsXFILnltcvVEfZ/uy7bLZqM4oUiezpRmIB1TkvzuHlPh/OwQiUixRJkt JqMI+Xt5tUIedC8uJPljgDk76e0vWNjznAeDR1TEG4ynzhYbVdCl9pMMt4TRNxZi npWzbozgG7s= =dFxy -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce