-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel security and bug fix update Advisory ID: RHSA-2017:0501-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2017-0501.html Issue date: 2017-03-14 CVE Names: CVE-2017-6074 ===================================================================== 1. Summary: An update for kernel is now available for Red Hat Enterprise Linux 7.2 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 ComputeNode EUS (v. 7.2) - noarch, x86_64 Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.2) - x86_64 Red Hat Enterprise Linux Server EUS (v. 7.2) - noarch, ppc64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux Server Optional EUS (v. 7.2) - ppc64, ppc64le, x86_64 3. Description: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * A use-after-free flaw was found in the way the Linux kernel's Datagram Congestion Control Protocol (DCCP) implementation freed SKB (socket buffer) resources for a DCCP_PKT_REQUEST packet when the IPV6_RECVPKTINFO option is set on the socket. A local, unprivileged user could use this flaw to alter the kernel memory, allowing them to escalate their privileges on the system. (CVE-2017-6074, Important) Red Hat would like to thank Andrey Konovalov (Google) for reporting this issue. Bug Fix(es): * Previously, running the "ethtool -S" command to get the statistics of a Brocade Network Adapter (BNA) sometimes caused a kernel panic. This update applies a set of patches to the bna driver, and the kernel panic no longer occurs in the described scenario. (BZ#1408130) * Use of a multi-threaded workload with high memory mappings sometimes caused a kernel panic, due to a race condition between the context switch and the pagetable upgrade. This update fixes the switch_mm() by using the complete asce parameter instead of the asce_bits parameter. As a result, the kernel no longer panics in the described scenario. (BZ#1410865) * Previously, the kernel was sending a Transmission Control Protocol (TCP) window which had a size of zero for a socket with an empty receive queue. Consequently, the TCP session became unresponsive. This update fixes the ibmveth driver to set correct values of the gso_size and gso_type variables and to calculate the value of the gso_segs variable for large packets. As a result, the TCP session no longer hangs in the described scenario. (BZ#1411381) * Previously, booting a kdump kernel in some cases failed with this error: Kernel panic - not syncing: Watchdog detected hard LOCKUP on CPU 0. This update ensures that the hpet timer software counters, including hpet_default_delta and hpet_t1_cmp, are initialized before an interrupt request is registered, and the kdump kernel now boots without the mentioned error message. (BZ#1404183) * When one of the drives became unresponsive, all other drives intermittently hung, because the megaraid_sas driver incorrectly sent a reset request to the PowerEdge RAID Controller (PERC). This update fixes megaraid_sas, and thus the hang of one drive no longer leads to intermittent loss of access to all drives on the system. (BZ#1398174) 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/): 1423071 - CVE-2017-6074 kernel: use after free in dccp protocol 6. Package List: Red Hat Enterprise Linux ComputeNode EUS (v. 7.2): Source: kernel-3.10.0-327.49.2.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-327.49.2.el7.noarch.rpm kernel-doc-3.10.0-327.49.2.el7.noarch.rpm x86_64: kernel-3.10.0-327.49.2.el7.x86_64.rpm kernel-debug-3.10.0-327.49.2.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm kernel-debug-devel-3.10.0-327.49.2.el7.x86_64.rpm kernel-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-327.49.2.el7.x86_64.rpm kernel-devel-3.10.0-327.49.2.el7.x86_64.rpm kernel-headers-3.10.0-327.49.2.el7.x86_64.rpm kernel-tools-3.10.0-327.49.2.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm kernel-tools-libs-3.10.0-327.49.2.el7.x86_64.rpm perf-3.10.0-327.49.2.el7.x86_64.rpm perf-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm python-perf-3.10.0-327.49.2.el7.x86_64.rpm python-perf-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.2): x86_64: kernel-debug-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm kernel-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-327.49.2.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-327.49.2.el7.x86_64.rpm perf-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm python-perf-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm Red Hat Enterprise Linux Server EUS (v. 7.2): Source: kernel-3.10.0-327.49.2.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-327.49.2.el7.noarch.rpm kernel-doc-3.10.0-327.49.2.el7.noarch.rpm ppc64: kernel-3.10.0-327.49.2.el7.ppc64.rpm kernel-bootwrapper-3.10.0-327.49.2.el7.ppc64.rpm kernel-debug-3.10.0-327.49.2.el7.ppc64.rpm kernel-debug-debuginfo-3.10.0-327.49.2.el7.ppc64.rpm kernel-debug-devel-3.10.0-327.49.2.el7.ppc64.rpm kernel-debuginfo-3.10.0-327.49.2.el7.ppc64.rpm kernel-debuginfo-common-ppc64-3.10.0-327.49.2.el7.ppc64.rpm kernel-devel-3.10.0-327.49.2.el7.ppc64.rpm kernel-headers-3.10.0-327.49.2.el7.ppc64.rpm kernel-tools-3.10.0-327.49.2.el7.ppc64.rpm kernel-tools-debuginfo-3.10.0-327.49.2.el7.ppc64.rpm kernel-tools-libs-3.10.0-327.49.2.el7.ppc64.rpm perf-3.10.0-327.49.2.el7.ppc64.rpm perf-debuginfo-3.10.0-327.49.2.el7.ppc64.rpm python-perf-3.10.0-327.49.2.el7.ppc64.rpm python-perf-debuginfo-3.10.0-327.49.2.el7.ppc64.rpm ppc64le: kernel-3.10.0-327.49.2.el7.ppc64le.rpm kernel-bootwrapper-3.10.0-327.49.2.el7.ppc64le.rpm kernel-debug-3.10.0-327.49.2.el7.ppc64le.rpm kernel-debug-debuginfo-3.10.0-327.49.2.el7.ppc64le.rpm kernel-debuginfo-3.10.0-327.49.2.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-327.49.2.el7.ppc64le.rpm kernel-devel-3.10.0-327.49.2.el7.ppc64le.rpm kernel-headers-3.10.0-327.49.2.el7.ppc64le.rpm kernel-tools-3.10.0-327.49.2.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-327.49.2.el7.ppc64le.rpm kernel-tools-libs-3.10.0-327.49.2.el7.ppc64le.rpm perf-3.10.0-327.49.2.el7.ppc64le.rpm perf-debuginfo-3.10.0-327.49.2.el7.ppc64le.rpm python-perf-3.10.0-327.49.2.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-327.49.2.el7.ppc64le.rpm s390x: kernel-3.10.0-327.49.2.el7.s390x.rpm kernel-debug-3.10.0-327.49.2.el7.s390x.rpm kernel-debug-debuginfo-3.10.0-327.49.2.el7.s390x.rpm kernel-debug-devel-3.10.0-327.49.2.el7.s390x.rpm kernel-debuginfo-3.10.0-327.49.2.el7.s390x.rpm kernel-debuginfo-common-s390x-3.10.0-327.49.2.el7.s390x.rpm kernel-devel-3.10.0-327.49.2.el7.s390x.rpm kernel-headers-3.10.0-327.49.2.el7.s390x.rpm kernel-kdump-3.10.0-327.49.2.el7.s390x.rpm kernel-kdump-debuginfo-3.10.0-327.49.2.el7.s390x.rpm kernel-kdump-devel-3.10.0-327.49.2.el7.s390x.rpm perf-3.10.0-327.49.2.el7.s390x.rpm perf-debuginfo-3.10.0-327.49.2.el7.s390x.rpm python-perf-3.10.0-327.49.2.el7.s390x.rpm python-perf-debuginfo-3.10.0-327.49.2.el7.s390x.rpm x86_64: kernel-3.10.0-327.49.2.el7.x86_64.rpm kernel-debug-3.10.0-327.49.2.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm kernel-debug-devel-3.10.0-327.49.2.el7.x86_64.rpm kernel-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-327.49.2.el7.x86_64.rpm kernel-devel-3.10.0-327.49.2.el7.x86_64.rpm kernel-headers-3.10.0-327.49.2.el7.x86_64.rpm kernel-tools-3.10.0-327.49.2.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm kernel-tools-libs-3.10.0-327.49.2.el7.x86_64.rpm perf-3.10.0-327.49.2.el7.x86_64.rpm perf-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm python-perf-3.10.0-327.49.2.el7.x86_64.rpm python-perf-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm Red Hat Enterprise Linux Server Optional EUS (v. 7.2): ppc64: kernel-debug-debuginfo-3.10.0-327.49.2.el7.ppc64.rpm kernel-debuginfo-3.10.0-327.49.2.el7.ppc64.rpm kernel-debuginfo-common-ppc64-3.10.0-327.49.2.el7.ppc64.rpm kernel-tools-debuginfo-3.10.0-327.49.2.el7.ppc64.rpm kernel-tools-libs-devel-3.10.0-327.49.2.el7.ppc64.rpm perf-debuginfo-3.10.0-327.49.2.el7.ppc64.rpm python-perf-debuginfo-3.10.0-327.49.2.el7.ppc64.rpm ppc64le: kernel-debug-debuginfo-3.10.0-327.49.2.el7.ppc64le.rpm kernel-debug-devel-3.10.0-327.49.2.el7.ppc64le.rpm kernel-debuginfo-3.10.0-327.49.2.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-327.49.2.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-327.49.2.el7.ppc64le.rpm kernel-tools-libs-devel-3.10.0-327.49.2.el7.ppc64le.rpm perf-debuginfo-3.10.0-327.49.2.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-327.49.2.el7.ppc64le.rpm x86_64: kernel-debug-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm kernel-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-327.49.2.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-327.49.2.el7.x86_64.rpm perf-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm python-perf-debuginfo-3.10.0-327.49.2.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-2017-6074 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 2017 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFYyBCVXlSAg2UNWIIRAgHdAJ97IVCejcXddxnLrTFBO5qrp35lNACfbQN7 q1pdhdo5qO/uSRjGNnbw/yg= =Ccwh -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce