-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel security and bug fix update Advisory ID: RHSA-2018:1351-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2018:1351 Issue date: 2018-05-08 CVE Names: CVE-2018-8897 ===================================================================== 1. Summary: An update for kernel is now available for Red Hat Enterprise Linux 6.6 Advanced Update Support and Red Hat Enterprise Linux 6.6 Telco 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 Server AUS (v. 6.6) - noarch, x86_64 Red Hat Enterprise Linux Server Optional AUS (v. 6.6) - x86_64 Red Hat Enterprise Linux Server Optional TUS (v. 6.6) - x86_64 Red Hat Enterprise Linux Server TUS (v. 6.6) - noarch, x86_64 3. Description: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * hw: cpu: speculative execution permission faults handling (CVE-2017-5754) * Kernel: error in exception handling leads to DoS (CVE-2018-8897) 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 Google Project Zero for reporting CVE-2017-5754 and Nick Peterson (Everdox Tech LLC) and Andy Lutomirski for reporting CVE-2018-8897. Bug Fix(es): * If an NFSv3 client mounted a subdirectory of an exported file system, a directory entry to the mount hosting the export was incorrectly held even after clearing the cache. Consequently, attempts to unmount the subdirectory with the umount command failed with the EBUSY error. With this update, the underlying source code has been fixed, and the unmount operation now succeeds as expected in the described situation. (BZ#1538588) * The kernel build requirements have been updated to the GNU Compiler Collection (GCC) compiler version that has the support for Retpolines. The Retpolines mechanism is a software construct that leverages specific knowledge of the underlying hardware to mitigate the branch target injection, also known as Spectre variant 2 vulnerability described in CVE-2017-5715. (BZ#1554254) 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/): 1519781 - CVE-2017-5754 hw: cpu: speculative execution permission faults handling 1567074 - CVE-2018-8897 Kernel: error in exception handling leads to DoS 6. Package List: Red Hat Enterprise Linux Server AUS (v. 6.6): Source: kernel-2.6.32-504.68.2.el6.src.rpm noarch: kernel-abi-whitelists-2.6.32-504.68.2.el6.noarch.rpm kernel-doc-2.6.32-504.68.2.el6.noarch.rpm kernel-firmware-2.6.32-504.68.2.el6.noarch.rpm x86_64: kernel-2.6.32-504.68.2.el6.x86_64.rpm kernel-debug-2.6.32-504.68.2.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm kernel-debug-devel-2.6.32-504.68.2.el6.x86_64.rpm kernel-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-504.68.2.el6.x86_64.rpm kernel-devel-2.6.32-504.68.2.el6.x86_64.rpm kernel-headers-2.6.32-504.68.2.el6.x86_64.rpm perf-2.6.32-504.68.2.el6.x86_64.rpm perf-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm python-perf-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm Red Hat Enterprise Linux Server TUS (v. 6.6): Source: kernel-2.6.32-504.68.2.el6.src.rpm noarch: kernel-abi-whitelists-2.6.32-504.68.2.el6.noarch.rpm kernel-doc-2.6.32-504.68.2.el6.noarch.rpm kernel-firmware-2.6.32-504.68.2.el6.noarch.rpm x86_64: kernel-2.6.32-504.68.2.el6.x86_64.rpm kernel-debug-2.6.32-504.68.2.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm kernel-debug-devel-2.6.32-504.68.2.el6.x86_64.rpm kernel-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-504.68.2.el6.x86_64.rpm kernel-devel-2.6.32-504.68.2.el6.x86_64.rpm kernel-headers-2.6.32-504.68.2.el6.x86_64.rpm perf-2.6.32-504.68.2.el6.x86_64.rpm perf-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm python-perf-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm Red Hat Enterprise Linux Server Optional AUS (v. 6.6): x86_64: kernel-debug-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm kernel-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-504.68.2.el6.x86_64.rpm perf-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm python-perf-2.6.32-504.68.2.el6.x86_64.rpm python-perf-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm Red Hat Enterprise Linux Server Optional TUS (v. 6.6): x86_64: kernel-debug-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm kernel-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-504.68.2.el6.x86_64.rpm perf-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm python-perf-2.6.32-504.68.2.el6.x86_64.rpm python-perf-debuginfo-2.6.32-504.68.2.el6.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-2018-8897 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/security/vulnerabilities/speculativeexecution https://access.redhat.com/security/vulnerabilities/pop_ss https://access.redhat.com/security/cve/CVE-2017-5754 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 iD8DBQFa8hvVXlSAg2UNWIIRAvxpAKCyATOJJVz4FToyT99jA7Pkzy2vTACcD5H5 F4NmZtCYwfkBTxlNHHeXy/8= =SAH1 -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce