-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel security and bug fix update Advisory ID: RHSA-2016:1939-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2016-1939.html Issue date: 2016-09-27 CVE Names: CVE-2016-5696 ===================================================================== 1. Summary: An update for kernel is now available for Red Hat Enterprise Linux 6.6 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 HPC Node EUS (v. 6.6) - noarch, x86_64 Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.6) - x86_64 Red Hat Enterprise Linux Server EUS (v. 6.6) - i386, noarch, ppc64, s390x, x86_64 Red Hat Enterprise Linux Server Optional EUS (v. 6.6) - i386, ppc64, s390x, x86_64 3. Description: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * It was found that the RFC 5961 challenge ACK rate limiting as implemented in the Linux kernel's networking subsystem allowed an off-path attacker to leak certain information about a given connection by creating congestion on the global challenge ACK rate limit counter and then measuring the changes by probing packets. An off-path attacker could use this flaw to either terminate TCP connection and/or inject payload into non-secured TCP connection between two endpoints on the network. (CVE-2016-5696, Important) Red Hat would like to thank Yue Cao (Cyber Security Group of the CS department of University of California in Riverside) for reporting this issue. Bug Fix(es): * Previously, the BUG_ON() signal appeared in the fs_clear_inode() function where the nfs_have_writebacks() function reported a positive value for nfs_inode->npages. As a consequence, a kernel panic occurred. The provided patch performs a serialization by holding the inode i_lock over the check of PagePrivate and locking the request, which fixes this bug. (BZ#1365163) 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/): 1354708 - CVE-2016-5696 kernel: challenge ACK counter information disclosure. 6. Package List: Red Hat Enterprise Linux HPC Node EUS (v. 6.6): Source: kernel-2.6.32-504.52.1.el6.src.rpm noarch: kernel-abi-whitelists-2.6.32-504.52.1.el6.noarch.rpm kernel-doc-2.6.32-504.52.1.el6.noarch.rpm kernel-firmware-2.6.32-504.52.1.el6.noarch.rpm x86_64: kernel-2.6.32-504.52.1.el6.x86_64.rpm kernel-debug-2.6.32-504.52.1.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-504.52.1.el6.i686.rpm kernel-debug-debuginfo-2.6.32-504.52.1.el6.x86_64.rpm kernel-debug-devel-2.6.32-504.52.1.el6.i686.rpm kernel-debug-devel-2.6.32-504.52.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-504.52.1.el6.i686.rpm kernel-debuginfo-2.6.32-504.52.1.el6.x86_64.rpm kernel-debuginfo-common-i686-2.6.32-504.52.1.el6.i686.rpm kernel-debuginfo-common-x86_64-2.6.32-504.52.1.el6.x86_64.rpm kernel-devel-2.6.32-504.52.1.el6.x86_64.rpm kernel-headers-2.6.32-504.52.1.el6.x86_64.rpm perf-2.6.32-504.52.1.el6.x86_64.rpm perf-debuginfo-2.6.32-504.52.1.el6.i686.rpm perf-debuginfo-2.6.32-504.52.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-504.52.1.el6.i686.rpm python-perf-debuginfo-2.6.32-504.52.1.el6.x86_64.rpm Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.6): x86_64: kernel-debug-debuginfo-2.6.32-504.52.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-504.52.1.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-504.52.1.el6.x86_64.rpm perf-debuginfo-2.6.32-504.52.1.el6.x86_64.rpm python-perf-2.6.32-504.52.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-504.52.1.el6.x86_64.rpm Red Hat Enterprise Linux Server EUS (v. 6.6): Source: kernel-2.6.32-504.52.1.el6.src.rpm i386: kernel-2.6.32-504.52.1.el6.i686.rpm kernel-debug-2.6.32-504.52.1.el6.i686.rpm kernel-debug-debuginfo-2.6.32-504.52.1.el6.i686.rpm kernel-debug-devel-2.6.32-504.52.1.el6.i686.rpm kernel-debuginfo-2.6.32-504.52.1.el6.i686.rpm kernel-debuginfo-common-i686-2.6.32-504.52.1.el6.i686.rpm kernel-devel-2.6.32-504.52.1.el6.i686.rpm kernel-headers-2.6.32-504.52.1.el6.i686.rpm perf-2.6.32-504.52.1.el6.i686.rpm perf-debuginfo-2.6.32-504.52.1.el6.i686.rpm python-perf-debuginfo-2.6.32-504.52.1.el6.i686.rpm noarch: kernel-abi-whitelists-2.6.32-504.52.1.el6.noarch.rpm kernel-doc-2.6.32-504.52.1.el6.noarch.rpm kernel-firmware-2.6.32-504.52.1.el6.noarch.rpm ppc64: kernel-2.6.32-504.52.1.el6.ppc64.rpm kernel-bootwrapper-2.6.32-504.52.1.el6.ppc64.rpm kernel-debug-2.6.32-504.52.1.el6.ppc64.rpm kernel-debug-debuginfo-2.6.32-504.52.1.el6.ppc64.rpm kernel-debug-devel-2.6.32-504.52.1.el6.ppc64.rpm kernel-debuginfo-2.6.32-504.52.1.el6.ppc64.rpm kernel-debuginfo-common-ppc64-2.6.32-504.52.1.el6.ppc64.rpm kernel-devel-2.6.32-504.52.1.el6.ppc64.rpm kernel-headers-2.6.32-504.52.1.el6.ppc64.rpm perf-2.6.32-504.52.1.el6.ppc64.rpm perf-debuginfo-2.6.32-504.52.1.el6.ppc64.rpm python-perf-debuginfo-2.6.32-504.52.1.el6.ppc64.rpm s390x: kernel-2.6.32-504.52.1.el6.s390x.rpm kernel-debug-2.6.32-504.52.1.el6.s390x.rpm kernel-debug-debuginfo-2.6.32-504.52.1.el6.s390x.rpm kernel-debug-devel-2.6.32-504.52.1.el6.s390x.rpm kernel-debuginfo-2.6.32-504.52.1.el6.s390x.rpm kernel-debuginfo-common-s390x-2.6.32-504.52.1.el6.s390x.rpm kernel-devel-2.6.32-504.52.1.el6.s390x.rpm kernel-headers-2.6.32-504.52.1.el6.s390x.rpm kernel-kdump-2.6.32-504.52.1.el6.s390x.rpm kernel-kdump-debuginfo-2.6.32-504.52.1.el6.s390x.rpm kernel-kdump-devel-2.6.32-504.52.1.el6.s390x.rpm perf-2.6.32-504.52.1.el6.s390x.rpm perf-debuginfo-2.6.32-504.52.1.el6.s390x.rpm python-perf-debuginfo-2.6.32-504.52.1.el6.s390x.rpm x86_64: kernel-2.6.32-504.52.1.el6.x86_64.rpm kernel-debug-2.6.32-504.52.1.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-504.52.1.el6.i686.rpm kernel-debug-debuginfo-2.6.32-504.52.1.el6.x86_64.rpm kernel-debug-devel-2.6.32-504.52.1.el6.i686.rpm kernel-debug-devel-2.6.32-504.52.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-504.52.1.el6.i686.rpm kernel-debuginfo-2.6.32-504.52.1.el6.x86_64.rpm kernel-debuginfo-common-i686-2.6.32-504.52.1.el6.i686.rpm kernel-debuginfo-common-x86_64-2.6.32-504.52.1.el6.x86_64.rpm kernel-devel-2.6.32-504.52.1.el6.x86_64.rpm kernel-headers-2.6.32-504.52.1.el6.x86_64.rpm perf-2.6.32-504.52.1.el6.x86_64.rpm perf-debuginfo-2.6.32-504.52.1.el6.i686.rpm perf-debuginfo-2.6.32-504.52.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-504.52.1.el6.i686.rpm python-perf-debuginfo-2.6.32-504.52.1.el6.x86_64.rpm Red Hat Enterprise Linux Server Optional EUS (v. 6.6): i386: kernel-debug-debuginfo-2.6.32-504.52.1.el6.i686.rpm kernel-debuginfo-2.6.32-504.52.1.el6.i686.rpm kernel-debuginfo-common-i686-2.6.32-504.52.1.el6.i686.rpm perf-debuginfo-2.6.32-504.52.1.el6.i686.rpm python-perf-2.6.32-504.52.1.el6.i686.rpm python-perf-debuginfo-2.6.32-504.52.1.el6.i686.rpm ppc64: kernel-debug-debuginfo-2.6.32-504.52.1.el6.ppc64.rpm kernel-debuginfo-2.6.32-504.52.1.el6.ppc64.rpm kernel-debuginfo-common-ppc64-2.6.32-504.52.1.el6.ppc64.rpm perf-debuginfo-2.6.32-504.52.1.el6.ppc64.rpm python-perf-2.6.32-504.52.1.el6.ppc64.rpm python-perf-debuginfo-2.6.32-504.52.1.el6.ppc64.rpm s390x: kernel-debug-debuginfo-2.6.32-504.52.1.el6.s390x.rpm kernel-debuginfo-2.6.32-504.52.1.el6.s390x.rpm kernel-debuginfo-common-s390x-2.6.32-504.52.1.el6.s390x.rpm kernel-kdump-debuginfo-2.6.32-504.52.1.el6.s390x.rpm perf-debuginfo-2.6.32-504.52.1.el6.s390x.rpm python-perf-2.6.32-504.52.1.el6.s390x.rpm python-perf-debuginfo-2.6.32-504.52.1.el6.s390x.rpm x86_64: kernel-debug-debuginfo-2.6.32-504.52.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-504.52.1.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-504.52.1.el6.x86_64.rpm perf-debuginfo-2.6.32-504.52.1.el6.x86_64.rpm python-perf-2.6.32-504.52.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-504.52.1.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-2016-5696 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 2016 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFX6o4fXlSAg2UNWIIRAjgrAJ4wqUWXEmG3769ycxYKA0e/jtRAkwCfWOUn kls74N7MY3LKo17IvKh1Md8= =cmdw -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce