-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel security and bug fix update Advisory ID: RHSA-2017:0892-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2017:0892 Issue date: 2017-04-11 CVE Names: CVE-2016-7910 CVE-2017-2636 ===================================================================== 1. Summary: An update for kernel is now available for Red Hat Enterprise Linux 6. 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 Desktop (v. 6) - i386, noarch, x86_64 Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64 Red Hat Enterprise Linux HPC Node (v. 6) - noarch, x86_64 Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64 Red Hat Enterprise Linux Server (v. 6) - i386, noarch, ppc64, s390x, x86_64 Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64 Red Hat Enterprise Linux Workstation (v. 6) - i386, noarch, x86_64 Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64 3. Description: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * A race condition flaw was found in the N_HLDC Linux kernel driver when accessing n_hdlc.tbuf list that can lead to double free. A local, unprivileged user able to set the HDLC line discipline on the tty device could use this flaw to increase their privileges on the system. (CVE-2017-2636, Important) * A flaw was found in the Linux kernel's implementation of seq_file where a local attacker could manipulate memory in the put() function pointer. This could lead to memory corruption and possible privileged escalation. (CVE-2016-7910, Moderate) Red Hat would like to thank Alexander Popov for reporting CVE-2017-2636. Bug Fix(es): * Previously, Chelsio firmware included an incorrectly-formatted firmware bin file. As a consequence, the firmware could not be flashed. This update provides a firmware bin file that is formatted correctly. As a result, Chelsio firmware can now be flashed successfully. (BZ#1433865) * When multiple simultaneous processes attempted to read from the /proc/stat file, spinlock overhead was generated on Non-Uniform Memory Access (NUMA) systems. Consequently, a large amount of CPU was consumed. With this update, the underlying source code has been fixed to avoid taking spinlock when the interrupt line does not exist. As a result, the spinlock overhead is now generated less often, and multiple simultaneous processes can now read /proc/stat without consuming a large amount of CPU. (BZ#1428106) 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/): 1399727 - CVE-2016-7910 kernel: Use after free in seq file 1428319 - CVE-2017-2636 kernel: Race condition access to n_hdlc.tbuf causes double free in n_hdlc_release() 6. Package List: Red Hat Enterprise Linux Desktop (v. 6): Source: kernel-2.6.32-696.1.1.el6.src.rpm i386: kernel-2.6.32-696.1.1.el6.i686.rpm kernel-debug-2.6.32-696.1.1.el6.i686.rpm kernel-debug-debuginfo-2.6.32-696.1.1.el6.i686.rpm kernel-debug-devel-2.6.32-696.1.1.el6.i686.rpm kernel-debuginfo-2.6.32-696.1.1.el6.i686.rpm kernel-debuginfo-common-i686-2.6.32-696.1.1.el6.i686.rpm kernel-devel-2.6.32-696.1.1.el6.i686.rpm kernel-headers-2.6.32-696.1.1.el6.i686.rpm perf-2.6.32-696.1.1.el6.i686.rpm perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm python-perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm noarch: kernel-abi-whitelists-2.6.32-696.1.1.el6.noarch.rpm kernel-doc-2.6.32-696.1.1.el6.noarch.rpm kernel-firmware-2.6.32-696.1.1.el6.noarch.rpm x86_64: kernel-2.6.32-696.1.1.el6.x86_64.rpm kernel-debug-2.6.32-696.1.1.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-696.1.1.el6.i686.rpm kernel-debug-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm kernel-debug-devel-2.6.32-696.1.1.el6.i686.rpm kernel-debug-devel-2.6.32-696.1.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-696.1.1.el6.i686.rpm kernel-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm kernel-debuginfo-common-i686-2.6.32-696.1.1.el6.i686.rpm kernel-debuginfo-common-x86_64-2.6.32-696.1.1.el6.x86_64.rpm kernel-devel-2.6.32-696.1.1.el6.x86_64.rpm kernel-headers-2.6.32-696.1.1.el6.x86_64.rpm perf-2.6.32-696.1.1.el6.x86_64.rpm perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm python-perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm Red Hat Enterprise Linux Desktop Optional (v. 6): i386: kernel-debug-debuginfo-2.6.32-696.1.1.el6.i686.rpm kernel-debuginfo-2.6.32-696.1.1.el6.i686.rpm kernel-debuginfo-common-i686-2.6.32-696.1.1.el6.i686.rpm perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm python-perf-2.6.32-696.1.1.el6.i686.rpm python-perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm x86_64: kernel-debug-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-696.1.1.el6.x86_64.rpm perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm python-perf-2.6.32-696.1.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm Red Hat Enterprise Linux HPC Node (v. 6): Source: kernel-2.6.32-696.1.1.el6.src.rpm noarch: kernel-abi-whitelists-2.6.32-696.1.1.el6.noarch.rpm kernel-doc-2.6.32-696.1.1.el6.noarch.rpm kernel-firmware-2.6.32-696.1.1.el6.noarch.rpm x86_64: kernel-2.6.32-696.1.1.el6.x86_64.rpm kernel-debug-2.6.32-696.1.1.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-696.1.1.el6.i686.rpm kernel-debug-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm kernel-debug-devel-2.6.32-696.1.1.el6.i686.rpm kernel-debug-devel-2.6.32-696.1.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-696.1.1.el6.i686.rpm kernel-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm kernel-debuginfo-common-i686-2.6.32-696.1.1.el6.i686.rpm kernel-debuginfo-common-x86_64-2.6.32-696.1.1.el6.x86_64.rpm kernel-devel-2.6.32-696.1.1.el6.x86_64.rpm kernel-headers-2.6.32-696.1.1.el6.x86_64.rpm perf-2.6.32-696.1.1.el6.x86_64.rpm perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm python-perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm Red Hat Enterprise Linux HPC Node Optional (v. 6): x86_64: kernel-debug-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-696.1.1.el6.x86_64.rpm perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm python-perf-2.6.32-696.1.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm Red Hat Enterprise Linux Server (v. 6): Source: kernel-2.6.32-696.1.1.el6.src.rpm i386: kernel-2.6.32-696.1.1.el6.i686.rpm kernel-debug-2.6.32-696.1.1.el6.i686.rpm kernel-debug-debuginfo-2.6.32-696.1.1.el6.i686.rpm kernel-debug-devel-2.6.32-696.1.1.el6.i686.rpm kernel-debuginfo-2.6.32-696.1.1.el6.i686.rpm kernel-debuginfo-common-i686-2.6.32-696.1.1.el6.i686.rpm kernel-devel-2.6.32-696.1.1.el6.i686.rpm kernel-headers-2.6.32-696.1.1.el6.i686.rpm perf-2.6.32-696.1.1.el6.i686.rpm perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm python-perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm noarch: kernel-abi-whitelists-2.6.32-696.1.1.el6.noarch.rpm kernel-doc-2.6.32-696.1.1.el6.noarch.rpm kernel-firmware-2.6.32-696.1.1.el6.noarch.rpm ppc64: kernel-2.6.32-696.1.1.el6.ppc64.rpm kernel-bootwrapper-2.6.32-696.1.1.el6.ppc64.rpm kernel-debug-2.6.32-696.1.1.el6.ppc64.rpm kernel-debug-debuginfo-2.6.32-696.1.1.el6.ppc64.rpm kernel-debug-devel-2.6.32-696.1.1.el6.ppc64.rpm kernel-debuginfo-2.6.32-696.1.1.el6.ppc64.rpm kernel-debuginfo-common-ppc64-2.6.32-696.1.1.el6.ppc64.rpm kernel-devel-2.6.32-696.1.1.el6.ppc64.rpm kernel-headers-2.6.32-696.1.1.el6.ppc64.rpm perf-2.6.32-696.1.1.el6.ppc64.rpm perf-debuginfo-2.6.32-696.1.1.el6.ppc64.rpm python-perf-debuginfo-2.6.32-696.1.1.el6.ppc64.rpm s390x: kernel-2.6.32-696.1.1.el6.s390x.rpm kernel-debug-2.6.32-696.1.1.el6.s390x.rpm kernel-debug-debuginfo-2.6.32-696.1.1.el6.s390x.rpm kernel-debug-devel-2.6.32-696.1.1.el6.s390x.rpm kernel-debuginfo-2.6.32-696.1.1.el6.s390x.rpm kernel-debuginfo-common-s390x-2.6.32-696.1.1.el6.s390x.rpm kernel-devel-2.6.32-696.1.1.el6.s390x.rpm kernel-headers-2.6.32-696.1.1.el6.s390x.rpm kernel-kdump-2.6.32-696.1.1.el6.s390x.rpm kernel-kdump-debuginfo-2.6.32-696.1.1.el6.s390x.rpm kernel-kdump-devel-2.6.32-696.1.1.el6.s390x.rpm perf-2.6.32-696.1.1.el6.s390x.rpm perf-debuginfo-2.6.32-696.1.1.el6.s390x.rpm python-perf-debuginfo-2.6.32-696.1.1.el6.s390x.rpm x86_64: kernel-2.6.32-696.1.1.el6.x86_64.rpm kernel-debug-2.6.32-696.1.1.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-696.1.1.el6.i686.rpm kernel-debug-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm kernel-debug-devel-2.6.32-696.1.1.el6.i686.rpm kernel-debug-devel-2.6.32-696.1.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-696.1.1.el6.i686.rpm kernel-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm kernel-debuginfo-common-i686-2.6.32-696.1.1.el6.i686.rpm kernel-debuginfo-common-x86_64-2.6.32-696.1.1.el6.x86_64.rpm kernel-devel-2.6.32-696.1.1.el6.x86_64.rpm kernel-headers-2.6.32-696.1.1.el6.x86_64.rpm perf-2.6.32-696.1.1.el6.x86_64.rpm perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm python-perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm Red Hat Enterprise Linux Server Optional (v. 6): i386: kernel-debug-debuginfo-2.6.32-696.1.1.el6.i686.rpm kernel-debuginfo-2.6.32-696.1.1.el6.i686.rpm kernel-debuginfo-common-i686-2.6.32-696.1.1.el6.i686.rpm perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm python-perf-2.6.32-696.1.1.el6.i686.rpm python-perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm ppc64: kernel-debug-debuginfo-2.6.32-696.1.1.el6.ppc64.rpm kernel-debuginfo-2.6.32-696.1.1.el6.ppc64.rpm kernel-debuginfo-common-ppc64-2.6.32-696.1.1.el6.ppc64.rpm perf-debuginfo-2.6.32-696.1.1.el6.ppc64.rpm python-perf-2.6.32-696.1.1.el6.ppc64.rpm python-perf-debuginfo-2.6.32-696.1.1.el6.ppc64.rpm s390x: kernel-debug-debuginfo-2.6.32-696.1.1.el6.s390x.rpm kernel-debuginfo-2.6.32-696.1.1.el6.s390x.rpm kernel-debuginfo-common-s390x-2.6.32-696.1.1.el6.s390x.rpm kernel-kdump-debuginfo-2.6.32-696.1.1.el6.s390x.rpm perf-debuginfo-2.6.32-696.1.1.el6.s390x.rpm python-perf-2.6.32-696.1.1.el6.s390x.rpm python-perf-debuginfo-2.6.32-696.1.1.el6.s390x.rpm x86_64: kernel-debug-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-696.1.1.el6.x86_64.rpm perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm python-perf-2.6.32-696.1.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 6): Source: kernel-2.6.32-696.1.1.el6.src.rpm i386: kernel-2.6.32-696.1.1.el6.i686.rpm kernel-debug-2.6.32-696.1.1.el6.i686.rpm kernel-debug-debuginfo-2.6.32-696.1.1.el6.i686.rpm kernel-debug-devel-2.6.32-696.1.1.el6.i686.rpm kernel-debuginfo-2.6.32-696.1.1.el6.i686.rpm kernel-debuginfo-common-i686-2.6.32-696.1.1.el6.i686.rpm kernel-devel-2.6.32-696.1.1.el6.i686.rpm kernel-headers-2.6.32-696.1.1.el6.i686.rpm perf-2.6.32-696.1.1.el6.i686.rpm perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm python-perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm noarch: kernel-abi-whitelists-2.6.32-696.1.1.el6.noarch.rpm kernel-doc-2.6.32-696.1.1.el6.noarch.rpm kernel-firmware-2.6.32-696.1.1.el6.noarch.rpm x86_64: kernel-2.6.32-696.1.1.el6.x86_64.rpm kernel-debug-2.6.32-696.1.1.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-696.1.1.el6.i686.rpm kernel-debug-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm kernel-debug-devel-2.6.32-696.1.1.el6.i686.rpm kernel-debug-devel-2.6.32-696.1.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-696.1.1.el6.i686.rpm kernel-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm kernel-debuginfo-common-i686-2.6.32-696.1.1.el6.i686.rpm kernel-debuginfo-common-x86_64-2.6.32-696.1.1.el6.x86_64.rpm kernel-devel-2.6.32-696.1.1.el6.x86_64.rpm kernel-headers-2.6.32-696.1.1.el6.x86_64.rpm perf-2.6.32-696.1.1.el6.x86_64.rpm perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm python-perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm Red Hat Enterprise Linux Workstation Optional (v. 6): i386: kernel-debug-debuginfo-2.6.32-696.1.1.el6.i686.rpm kernel-debuginfo-2.6.32-696.1.1.el6.i686.rpm kernel-debuginfo-common-i686-2.6.32-696.1.1.el6.i686.rpm perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm python-perf-2.6.32-696.1.1.el6.i686.rpm python-perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm x86_64: kernel-debug-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-696.1.1.el6.x86_64.rpm perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm python-perf-2.6.32-696.1.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-696.1.1.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-2016-7910 https://access.redhat.com/security/cve/CVE-2017-2636 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 iD8DBQFY7Nt6XlSAg2UNWIIRApweAKC7o76Fb9zsyuEJe2frk0y8PexXQACgg17Q ZikmOEYFPivutQinlRQx8IQ= =0Scs -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce