-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel security update Advisory ID: RHSA-2018:1639-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2018:1639 Issue date: 2018-05-29 CVE Names: CVE-2018-3639 ===================================================================== 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): * An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of Load & Store instructions (a commonly used performance optimization). It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that memory read from address to which a recent memory write has occurred may see an older value and subsequently cause an update into the microprocessor's data cache even for speculatively executed instructions that never actually commit (retire). As a result, an unprivileged attacker could use this flaw to read privileged memory by conducting targeted cache side-channel attacks. (CVE-2018-3639) Note: This issue is present in hardware and cannot be fully fixed via software update. The updated kernel packages provide software side of the mitigation for this hardware issue. To be fully functional, up-to-date CPU microcode applied on the system is required. Please refer to References section for further information about this issue, CPU microcode requirements and the potential performance impact. Red Hat would like to thank Ken Johnson (Microsoft Security Response Center) and Jann Horn (Google Project Zero) for reporting this issue. 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/): 1566890 - CVE-2018-3639 hw: cpu: speculative store bypass 6. Package List: Red Hat Enterprise Linux Server AUS (v. 6.6): Source: kernel-2.6.32-504.69.3.el6.src.rpm noarch: kernel-abi-whitelists-2.6.32-504.69.3.el6.noarch.rpm kernel-doc-2.6.32-504.69.3.el6.noarch.rpm kernel-firmware-2.6.32-504.69.3.el6.noarch.rpm x86_64: kernel-2.6.32-504.69.3.el6.x86_64.rpm kernel-debug-2.6.32-504.69.3.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-504.69.3.el6.x86_64.rpm kernel-debug-devel-2.6.32-504.69.3.el6.x86_64.rpm kernel-debuginfo-2.6.32-504.69.3.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-504.69.3.el6.x86_64.rpm kernel-devel-2.6.32-504.69.3.el6.x86_64.rpm kernel-headers-2.6.32-504.69.3.el6.x86_64.rpm perf-2.6.32-504.69.3.el6.x86_64.rpm perf-debuginfo-2.6.32-504.69.3.el6.x86_64.rpm python-perf-debuginfo-2.6.32-504.69.3.el6.x86_64.rpm Red Hat Enterprise Linux Server TUS (v. 6.6): Source: kernel-2.6.32-504.69.3.el6.src.rpm noarch: kernel-abi-whitelists-2.6.32-504.69.3.el6.noarch.rpm kernel-doc-2.6.32-504.69.3.el6.noarch.rpm kernel-firmware-2.6.32-504.69.3.el6.noarch.rpm x86_64: kernel-2.6.32-504.69.3.el6.x86_64.rpm kernel-debug-2.6.32-504.69.3.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-504.69.3.el6.x86_64.rpm kernel-debug-devel-2.6.32-504.69.3.el6.x86_64.rpm kernel-debuginfo-2.6.32-504.69.3.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-504.69.3.el6.x86_64.rpm kernel-devel-2.6.32-504.69.3.el6.x86_64.rpm kernel-headers-2.6.32-504.69.3.el6.x86_64.rpm perf-2.6.32-504.69.3.el6.x86_64.rpm perf-debuginfo-2.6.32-504.69.3.el6.x86_64.rpm python-perf-debuginfo-2.6.32-504.69.3.el6.x86_64.rpm Red Hat Enterprise Linux Server Optional AUS (v. 6.6): x86_64: kernel-debug-debuginfo-2.6.32-504.69.3.el6.x86_64.rpm kernel-debuginfo-2.6.32-504.69.3.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-504.69.3.el6.x86_64.rpm perf-debuginfo-2.6.32-504.69.3.el6.x86_64.rpm python-perf-2.6.32-504.69.3.el6.x86_64.rpm python-perf-debuginfo-2.6.32-504.69.3.el6.x86_64.rpm Red Hat Enterprise Linux Server Optional TUS (v. 6.6): x86_64: kernel-debug-debuginfo-2.6.32-504.69.3.el6.x86_64.rpm kernel-debuginfo-2.6.32-504.69.3.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-504.69.3.el6.x86_64.rpm perf-debuginfo-2.6.32-504.69.3.el6.x86_64.rpm python-perf-2.6.32-504.69.3.el6.x86_64.rpm python-perf-debuginfo-2.6.32-504.69.3.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-2018-3639 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/security/vulnerabilities/ssbd 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 iQIVAwUBWw2Ah9zjgjWX9erEAQgYwg//e0Q3cPJIigLdHOmwG+T3FpwdO4aqn6ks jW6F8hAjOu9PxXWcb3MfqqZMNM6/l5bKTWM4Bm8/o4X29KmesrnIq1sAe2+MAE3Q gtBjEoXYSvpHxbqUweBZZRzimnYCtzmbrs/WMSlDWumM2qT666W0YgjemDNRk8Iu KADLvYFaqLSW28eOY4Q5y3ljgjTthW72ZYSudgsUB3CcqPBZ7EqXx/VWbbpAiumO MBsf83l/OvyhNlZ7zJTQiet0v3rTMf0zcnyrUp/7+VPZBZLxXHPC7Y4/7743M0cb fYrak+VsK7mQqCuj9mWagOyLbSuY4Yd1SVfxOH2gPh0cCKlZfdBcsiuHNG9Lkqd1 tZ6XSlbpO8g8AedNrhf+0x44UQJzB8c6E5tFzOEhqaridxvWx02rrjJ3Uk9sMvdl v1wEOZYyk+C0W8aByljPLv0js2p63zsBQyzoL1NnJbcM2sAIF99O75/XLRSY104s D2Krg+ZjHozbZTt0XiMiC6Pydg2cU1dne+C/GVB1SvKxqhV7KsSgB8/H+4KVN0SR VN8PAcb4MmkPwFp4z1ZpZF9oo+OR4yrZaAJyjcX8wi5XHqe4U+39HLMyIM1yQYoL VLmq/Ynr5zFDscFNAiv+wV29hrWbU+rtaudFf+SFwvNipS8+RmFV3nTFzQZMZDfT b0f25qNqSPM= =5cRp -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce