-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Moderate: kernel security and bug fix update Advisory ID: RHSA-2019:0202-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2019:0202 Issue date: 2019-01-29 CVE Names: CVE-2018-18397 ==================================================================== 1. Summary: An update for kernel is now available for Red Hat Enterprise Linux 7.5 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Moderate. 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 ComputeNode EUS (v. 7.5) - noarch, x86_64 Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.5) - x86_64 Red Hat Enterprise Linux Server EUS (v. 7.5) - noarch, ppc64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux Server Optional EUS (v. 7.5) - ppc64, ppc64le, x86_64 3. Description: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: userfaultfd bypasses tmpfs file permissions (CVE-2018-18397) 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. Bug Fix(es): * When applying two instances of the kprobe debugging mechanism to the same function, one of the kprobes in some cases failed, depending on the kernel address space layout. Consequently, a kprobe registration error occurred. This update fixes the bug in the kprobes registration code to properly detect and handle ftrace-based kprobes. As a result, both kprobes now apply successfully in the described scenario. (BZ#1647815) * Under heavy mad packet load, the SELinux checks in the mad packet queries for InfiniBand (IB) fabrics significantly increased the mad packet execution time. Consequently, if a single machine was executing a large perfquery to the IB switches of a High Performance (HPC) fabric, mad_rpc timeouts occurred, and the query failed even with SELinux disabled. This update eliminates the SELinux checks when SELinux is disabled. As a result, the mad packet queries through perfquery now have their original run times when SELinux is disabled. (BZ#1648810) * Previously, a file-system shutdown process caused by an I/O error could race against a running fstrim process to acquire a xfs buffer lock. Consequently, the file-system shutdown process never completed due to a deadlock and the file-system became unresponsive, unable to be unmounted. This update fixes the lock ordering so that the deadlock no longer occurs and the file-system shutdown process now completes in the described scenario. (BZ#1657142) 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/): 1641548 - CVE-2018-18397 kernel: userfaultfd bypasses tmpfs file permissions 6. Package List: Red Hat Enterprise Linux ComputeNode EUS (v. 7.5): Source: kernel-3.10.0-862.27.1.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-862.27.1.el7.noarch.rpm x86_64: kernel-devel-3.10.0-862.27.1.el7.x86_64.rpm Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.5): x86_64: kernel-debug-debuginfo-3.10.0-862.27.1.el7.x86_64.rpm Red Hat Enterprise Linux Server EUS (v. 7.5): Source: kernel-3.10.0-862.27.1.el7.src.rpm noarch: kernel-doc-3.10.0-862.27.1.el7.noarch.rpm ppc64: kernel-debuginfo-common-ppc64-3.10.0-862.27.1.el7.ppc64.rpm ppc64le: python-perf-debuginfo-3.10.0-862.27.1.el7.ppc64le.rpm s390x: python-perf-debuginfo-3.10.0-862.27.1.el7.s390x.rpm x86_64: python-perf-debuginfo-3.10.0-862.27.1.el7.x86_64.rpm Red Hat Enterprise Linux Server Optional EUS (v. 7.5): ppc64: kernel-debug-debuginfo-3.10.0-862.27.1.el7.ppc64.rpm ppc64le: kernel-debug-debuginfo-3.10.0-862.27.1.el7.ppc64le.rpm x86_64: kernel-debug-debuginfo-3.10.0-862.27.1.el7.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-2018-18397 https://access.redhat.com/security/updates/classification/#moderate 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2019 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBXFB6atzjgjWX9erEAQjUghAApsubUv03utWAoQKVug3COmcqv+Kgyove SCk3jnTTuNCYDXB60RAPELRhB9aQ9UbjdOpFInDrzrHwnUf5TvV1kHhvdb8ACQEo 2h9cB+xNUZBOkiY8lCOvweefjRgQBYGQl7KzbOpJuM3E8XMsyMmRY5bwRKlEXlYe HbRYCcz3a9Pe9Ijj5umW6F7cjT900VgUoAB1g5S/BCesYSCHuOb7FCq9EbkXgX/W MMqDWy0hBXqFrAKUF2GMuzC+CId+Uo5u72eCawUOyZmZP6t/rKU65qFvuhCtu4pW UFFsJMdrO86v/gBU9Jco90kL9iKjEZwde7F7adQCioO/Sr1DQcYBGe6DVrJqCLRI +gCZnDk4k5yUmXYQDZq53l0jG68F4AEWXg1YiBbJajnKkVKyG5yNaL56jMFeIe8l +6DleqNGKPy9RFBqKaUzCGCsuOiPX15V0Kkfh3wmmztRW4FinssW+qsZNLS3SE2c We0fZTMuzuSGnQbeTSi7hO7vwRi8fQxpP4zSEvhYZeWy7+OsnOj2EvdLB+UOQ7nP zzqUSMzLd8EXUIRKsSm/asJ74iRdypvYTs2xHYgjnW6SnS+jlhhPGD+bSngemKiq BoPT61En7d/puLKbBFWbVptzxmzrCUI8KBKQzdssfyQ61kzgxWN5jGsy1bZToVvx 9e5G21A9wrA=ZHD4 -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce