-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Important: kernel security, bug fix, and enhancement update Advisory ID: RHSA-2019:1483-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2019:1483 Issue date: 2019-06-17 CVE Names: CVE-2018-7566 CVE-2018-1000004 CVE-2019-11477 CVE-2019-11478 CVE-2019-11479 ==================================================================== 1. Summary: An update for kernel is now available for Red Hat Enterprise Linux 7.4 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. 7.4) - noarch, x86_64 Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.4) - x86_64 Red Hat Enterprise Linux Server EUS (v. 7.4) - noarch, ppc64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux Server Optional EUS (v. 7.4) - ppc64, ppc64le, x86_64 3. Description: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * An integer overflow flaw was found in the way the Linux kernel's networking subsystem processed TCP Selective Acknowledgment (SACK) segments. While processing SACK segments, the Linux kernel's socket buffer (SKB) data structure becomes fragmented. Each fragment is about TCP maximum segment size (MSS) bytes. To efficiently process SACK blocks, the Linux kernel merges multiple fragmented SKBs into one, potentially overflowing the variable holding the number of segments. A remote attacker could use this flaw to crash the Linux kernel by sending a crafted sequence of SACK segments on a TCP connection with small value of TCP MSS, resulting in a denial of service (DoS). (CVE-2019-11477) * kernel: race condition in snd_seq_write() may lead to UAF or OOB-access (CVE-2018-7566) * kernel: Race condition in sound system can lead to denial of service (CVE-2018-1000004) * Kernel: tcp: excessive resource consumption while processing SACK blocks allows remote denial of service (CVE-2019-11478) * Kernel: tcp: excessive resource consumption for TCP connections with low MSS allows remote denial of service (CVE-2019-11479) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Bug Fix(es): * Mistmach between 'tty->termios->c_lflag' and 'ldata->icanon' for 'ICANON' (BZ#1708061) * RHEL7: rwsem reader/writer mutual exclusion guarantee may not work (BZ#1709702) * hardened usercopy is causing crash (BZ#1712311) * [RHEL7] md_clear flag missing from /proc/cpuinfo on late microcode update (BZ#1712991) * [RHEL7] MDS mitigations are not enabled after double microcode update (BZ#1712996) * WARNING: CPU: 0 PID: 0 at kernel/jump_label.c:90 __static_key_slow_dec+0xa6/0xb0 (BZ#1713002) * [debug kernel] [x86_64]INFO: possible circular locking dependency detected (BZ#1715326) * RHEL-7.7: tty: termios_rwsem possible deadlock (BZ#1715329) Enhancement(s): * [MCHP 7.7 FEAT] Update smartpqi driver to latest upstream (BZ#1709467) 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/): 1535315 - CVE-2018-1000004 kernel: Race condition in sound system can lead to denial of service 1550142 - CVE-2018-7566 kernel: race condition in snd_seq_write() may lead to UAF or OOB-access 1719123 - CVE-2019-11477 Kernel: tcp: integer overflow while processing SACK blocks allows remote denial of service 1719128 - CVE-2019-11478 Kernel: tcp: excessive resource consumption while processing SACK blocks allows remote denial of service 1719129 - CVE-2019-11479 Kernel: tcp: excessive resource consumption for TCP connections with low MSS allows remote denial of service 6. Package List: Red Hat Enterprise Linux ComputeNode EUS (v. 7.4): Source: kernel-3.10.0-693.50.3.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-693.50.3.el7.noarch.rpm kernel-doc-3.10.0-693.50.3.el7.noarch.rpm x86_64: kernel-3.10.0-693.50.3.el7.x86_64.rpm kernel-debug-3.10.0-693.50.3.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-693.50.3.el7.x86_64.rpm kernel-debug-devel-3.10.0-693.50.3.el7.x86_64.rpm kernel-debuginfo-3.10.0-693.50.3.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-693.50.3.el7.x86_64.rpm kernel-devel-3.10.0-693.50.3.el7.x86_64.rpm kernel-headers-3.10.0-693.50.3.el7.x86_64.rpm kernel-tools-3.10.0-693.50.3.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-693.50.3.el7.x86_64.rpm kernel-tools-libs-3.10.0-693.50.3.el7.x86_64.rpm perf-3.10.0-693.50.3.el7.x86_64.rpm perf-debuginfo-3.10.0-693.50.3.el7.x86_64.rpm python-perf-3.10.0-693.50.3.el7.x86_64.rpm python-perf-debuginfo-3.10.0-693.50.3.el7.x86_64.rpm Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.4): x86_64: kernel-debug-debuginfo-3.10.0-693.50.3.el7.x86_64.rpm kernel-debuginfo-3.10.0-693.50.3.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-693.50.3.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-693.50.3.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-693.50.3.el7.x86_64.rpm perf-debuginfo-3.10.0-693.50.3.el7.x86_64.rpm python-perf-debuginfo-3.10.0-693.50.3.el7.x86_64.rpm Red Hat Enterprise Linux Server EUS (v. 7.4): Source: kernel-3.10.0-693.50.3.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-693.50.3.el7.noarch.rpm kernel-doc-3.10.0-693.50.3.el7.noarch.rpm ppc64: kernel-3.10.0-693.50.3.el7.ppc64.rpm kernel-bootwrapper-3.10.0-693.50.3.el7.ppc64.rpm kernel-debug-3.10.0-693.50.3.el7.ppc64.rpm kernel-debug-debuginfo-3.10.0-693.50.3.el7.ppc64.rpm kernel-debug-devel-3.10.0-693.50.3.el7.ppc64.rpm kernel-debuginfo-3.10.0-693.50.3.el7.ppc64.rpm kernel-debuginfo-common-ppc64-3.10.0-693.50.3.el7.ppc64.rpm kernel-devel-3.10.0-693.50.3.el7.ppc64.rpm kernel-headers-3.10.0-693.50.3.el7.ppc64.rpm kernel-tools-3.10.0-693.50.3.el7.ppc64.rpm kernel-tools-debuginfo-3.10.0-693.50.3.el7.ppc64.rpm kernel-tools-libs-3.10.0-693.50.3.el7.ppc64.rpm perf-3.10.0-693.50.3.el7.ppc64.rpm perf-debuginfo-3.10.0-693.50.3.el7.ppc64.rpm python-perf-3.10.0-693.50.3.el7.ppc64.rpm python-perf-debuginfo-3.10.0-693.50.3.el7.ppc64.rpm ppc64le: kernel-3.10.0-693.50.3.el7.ppc64le.rpm kernel-bootwrapper-3.10.0-693.50.3.el7.ppc64le.rpm kernel-debug-3.10.0-693.50.3.el7.ppc64le.rpm kernel-debug-debuginfo-3.10.0-693.50.3.el7.ppc64le.rpm kernel-debuginfo-3.10.0-693.50.3.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-693.50.3.el7.ppc64le.rpm kernel-devel-3.10.0-693.50.3.el7.ppc64le.rpm kernel-headers-3.10.0-693.50.3.el7.ppc64le.rpm kernel-tools-3.10.0-693.50.3.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-693.50.3.el7.ppc64le.rpm kernel-tools-libs-3.10.0-693.50.3.el7.ppc64le.rpm perf-3.10.0-693.50.3.el7.ppc64le.rpm perf-debuginfo-3.10.0-693.50.3.el7.ppc64le.rpm python-perf-3.10.0-693.50.3.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-693.50.3.el7.ppc64le.rpm s390x: kernel-3.10.0-693.50.3.el7.s390x.rpm kernel-debug-3.10.0-693.50.3.el7.s390x.rpm kernel-debug-debuginfo-3.10.0-693.50.3.el7.s390x.rpm kernel-debug-devel-3.10.0-693.50.3.el7.s390x.rpm kernel-debuginfo-3.10.0-693.50.3.el7.s390x.rpm kernel-debuginfo-common-s390x-3.10.0-693.50.3.el7.s390x.rpm kernel-devel-3.10.0-693.50.3.el7.s390x.rpm kernel-headers-3.10.0-693.50.3.el7.s390x.rpm kernel-kdump-3.10.0-693.50.3.el7.s390x.rpm kernel-kdump-debuginfo-3.10.0-693.50.3.el7.s390x.rpm kernel-kdump-devel-3.10.0-693.50.3.el7.s390x.rpm perf-3.10.0-693.50.3.el7.s390x.rpm perf-debuginfo-3.10.0-693.50.3.el7.s390x.rpm python-perf-3.10.0-693.50.3.el7.s390x.rpm python-perf-debuginfo-3.10.0-693.50.3.el7.s390x.rpm x86_64: kernel-3.10.0-693.50.3.el7.x86_64.rpm kernel-debug-3.10.0-693.50.3.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-693.50.3.el7.x86_64.rpm kernel-debug-devel-3.10.0-693.50.3.el7.x86_64.rpm kernel-debuginfo-3.10.0-693.50.3.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-693.50.3.el7.x86_64.rpm kernel-devel-3.10.0-693.50.3.el7.x86_64.rpm kernel-headers-3.10.0-693.50.3.el7.x86_64.rpm kernel-tools-3.10.0-693.50.3.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-693.50.3.el7.x86_64.rpm kernel-tools-libs-3.10.0-693.50.3.el7.x86_64.rpm perf-3.10.0-693.50.3.el7.x86_64.rpm perf-debuginfo-3.10.0-693.50.3.el7.x86_64.rpm python-perf-3.10.0-693.50.3.el7.x86_64.rpm python-perf-debuginfo-3.10.0-693.50.3.el7.x86_64.rpm Red Hat Enterprise Linux Server Optional EUS (v. 7.4): ppc64: kernel-debug-debuginfo-3.10.0-693.50.3.el7.ppc64.rpm kernel-debuginfo-3.10.0-693.50.3.el7.ppc64.rpm kernel-debuginfo-common-ppc64-3.10.0-693.50.3.el7.ppc64.rpm kernel-tools-debuginfo-3.10.0-693.50.3.el7.ppc64.rpm kernel-tools-libs-devel-3.10.0-693.50.3.el7.ppc64.rpm perf-debuginfo-3.10.0-693.50.3.el7.ppc64.rpm python-perf-debuginfo-3.10.0-693.50.3.el7.ppc64.rpm ppc64le: kernel-debug-debuginfo-3.10.0-693.50.3.el7.ppc64le.rpm kernel-debug-devel-3.10.0-693.50.3.el7.ppc64le.rpm kernel-debuginfo-3.10.0-693.50.3.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-693.50.3.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-693.50.3.el7.ppc64le.rpm kernel-tools-libs-devel-3.10.0-693.50.3.el7.ppc64le.rpm perf-debuginfo-3.10.0-693.50.3.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-693.50.3.el7.ppc64le.rpm x86_64: kernel-debug-debuginfo-3.10.0-693.50.3.el7.x86_64.rpm kernel-debuginfo-3.10.0-693.50.3.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-693.50.3.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-693.50.3.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-693.50.3.el7.x86_64.rpm perf-debuginfo-3.10.0-693.50.3.el7.x86_64.rpm python-perf-debuginfo-3.10.0-693.50.3.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-2018-7566 https://access.redhat.com/security/cve/CVE-2018-1000004 https://access.redhat.com/security/cve/CVE-2019-11477 https://access.redhat.com/security/cve/CVE-2019-11478 https://access.redhat.com/security/cve/CVE-2019-11479 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/security/vulnerabilities/tcpsack 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 iQIVAwUBXQflkNzjgjWX9erEAQiYBQ/8CqPgl6Z1FdlIkiIKctrTNxBA3HHwyY7j LQBGs4iRnTNxAHYafa1UyeF8nW5wB7x/KTiktC4bu4tur5xGbCuVsQAQX2/YeQHZ cEK3uU4N4wX31sJJmOki5qmnsW28fr1AuT0hfgL8/OWkf+eec66Momg8ZGS9MZ2X 2YJ8kzrE1dBBbBtzvNZDmAC/1i+VsalIObblsI1dIr+753oYnoP0x6WuPn1c7lod CbvPOQvfYB+0b/HNHhRxCOl4ay5NAYC/eCFx9h1JTPoQ/CzzjHwNBm2+HL+Lt+Av A1Ufnm4XBO/lyT1f9bvDiE9xHFP3wzN9hebQvvp4maAFbVPP7upqnCRESm9Ojzew k8n/UHgyWciTgEM79tQ+0Jx4r+k5KQT12mr023SEeRBCNd8H0odfN2SpwGwu39lz P1AwJhN9LddTfO3IOx2RZJcnshaIOhbDBuFW1GBUYgODsGd3RgUqVblryb53IVFG 6jHcYMetblt6dIAhTVtBUTOeVaG/rUkjuWaIKYhNjijgqUdQBGDDJWxK2E/hx+nq r5fgReLwxPz+q27cu70chK9lSa0RAUr3qgCOa+UYfqm3/LclXtPCI/z/YCESE5tc xSZyAhsRDEIgAsNO8neeG68HMX1JZCqun+HnHvcrmh7t2vXM/HRJl7ihp9md2au+ LbgoNJu99kM=aVva -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce