Security update for the Linux Kernel (Live Patch 1 for SLE 15) SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2019:0740-1 Final 1 1 2019-03-26T13:34:42Z current 2019-03-26T13:34:42Z 2019-03-26T13:34:42Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for the Linux Kernel (Live Patch 1 for SLE 15) This update for the Linux Kernel 4.12.14-25_3 fixes several issues. The following security issues were fixed: - CVE-2019-9213: Expand_downwards in mm/mmap.c lacked a check for the mmap minimum address, which made it easier for attackers to exploit kernel NULL pointer dereferences on non-SMAP platforms. This is related to a capability check for the wrong task (bsc#1128378). - CVE-2019-8912: af_alg_release() in crypto/af_alg.c neglected to set a NULL value for a certain structure member, which could have led to a use-after-free in sockfs_setattr (bsc#1126284). - CVE-2018-12232: In net/socket.c there was a race condition between fchownat and close in cases where they target the same socket file descriptor, related to the sock_close and sockfs_setattr functions. fchownat did not increment the file descriptor reference count, which allowed close to set the socket to NULL during fchownat's execution, leading to a NULL pointer dereference and system crash (bsc#1127757). - CVE-2019-7221: Fixed a user-after-free vulnerability in the KVM hypervisor related to the emulation of a preemption timer, allowing an guest user/process to crash the host kernel. (bsc#1124734). - CVE-2019-6974: kvm_ioctl_create_device in virt/kvm/kvm_main.c mishandled reference counting because of a race condition, leading to a use-after-free (bsc#1124729). The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-2019-740,SUSE-SLE-Module-Live-Patching-15-2019-740,SUSE-SLE-Module-Live-Patching-15-2019-746 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2019/suse-su-20190740-1/ Link for SUSE-SU-2019:0740-1 https://lists.suse.com/pipermail/sle-security-updates/2019-March/005235.html E-Mail link for SUSE-SU-2019:0740-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1124729 SUSE Bug 1124729 https://bugzilla.suse.com/1124734 SUSE Bug 1124734 https://bugzilla.suse.com/1126284 SUSE Bug 1126284 https://bugzilla.suse.com/1127757 SUSE Bug 1127757 https://bugzilla.suse.com/1128378 SUSE Bug 1128378 https://www.suse.com/security/cve/CVE-2018-12232/ SUSE CVE CVE-2018-12232 page https://www.suse.com/security/cve/CVE-2019-6974/ SUSE CVE CVE-2019-6974 page https://www.suse.com/security/cve/CVE-2019-7221/ SUSE CVE CVE-2019-7221 page https://www.suse.com/security/cve/CVE-2019-8912/ SUSE CVE CVE-2019-8912 page https://www.suse.com/security/cve/CVE-2019-9213/ SUSE CVE CVE-2019-9213 page SUSE Linux Enterprise Live Patching 15 kernel-livepatch-4_12_14-23-default-9-25.2 kernel-livepatch-4_12_14-25_3-default-8-2.1 kernel-livepatch-4_12_14-23-default-9-25.2 as a component of SUSE Linux Enterprise Live Patching 15 kernel-livepatch-4_12_14-25_3-default-8-2.1 as a component of SUSE Linux Enterprise Live Patching 15 In net/socket.c in the Linux kernel through 4.17.1, there is a race condition between fchownat and close in cases where they target the same socket file descriptor, related to the sock_close and sockfs_setattr functions. fchownat does not increment the file descriptor reference count, which allows close to set the socket to NULL during fchownat's execution, leading to a NULL pointer dereference and system crash. CVE-2018-12232 SUSE Linux Enterprise Live Patching 15:kernel-livepatch-4_12_14-23-default-9-25.2 SUSE Linux Enterprise Live Patching 15:kernel-livepatch-4_12_14-25_3-default-8-2.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2019/suse-su-20190740-1/ https://www.suse.com/security/cve/CVE-2018-12232.html CVE-2018-12232 https://bugzilla.suse.com/1087082 SUSE Bug 1087082 https://bugzilla.suse.com/1097593 SUSE Bug 1097593 https://bugzilla.suse.com/1125907 SUSE Bug 1125907 https://bugzilla.suse.com/1127757 SUSE Bug 1127757 In the Linux kernel before 4.20.8, kvm_ioctl_create_device in virt/kvm/kvm_main.c mishandles reference counting because of a race condition, leading to a use-after-free. CVE-2019-6974 SUSE Linux Enterprise Live Patching 15:kernel-livepatch-4_12_14-23-default-9-25.2 SUSE Linux Enterprise Live Patching 15:kernel-livepatch-4_12_14-25_3-default-8-2.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2019/suse-su-20190740-1/ https://www.suse.com/security/cve/CVE-2019-6974.html CVE-2019-6974 https://bugzilla.suse.com/1124728 SUSE Bug 1124728 https://bugzilla.suse.com/1124729 SUSE Bug 1124729 The KVM implementation in the Linux kernel through 4.20.5 has a Use-after-Free. CVE-2019-7221 SUSE Linux Enterprise Live Patching 15:kernel-livepatch-4_12_14-23-default-9-25.2 SUSE Linux Enterprise Live Patching 15:kernel-livepatch-4_12_14-25_3-default-8-2.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2019/suse-su-20190740-1/ https://www.suse.com/security/cve/CVE-2019-7221.html CVE-2019-7221 https://bugzilla.suse.com/1124732 SUSE Bug 1124732 https://bugzilla.suse.com/1124734 SUSE Bug 1124734 In the Linux kernel through 4.20.11, af_alg_release() in crypto/af_alg.c neglects to set a NULL value for a certain structure member, which leads to a use-after-free in sockfs_setattr. CVE-2019-8912 SUSE Linux Enterprise Live Patching 15:kernel-livepatch-4_12_14-23-default-9-25.2 SUSE Linux Enterprise Live Patching 15:kernel-livepatch-4_12_14-25_3-default-8-2.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2019/suse-su-20190740-1/ https://www.suse.com/security/cve/CVE-2019-8912.html CVE-2019-8912 https://bugzilla.suse.com/1125907 SUSE Bug 1125907 https://bugzilla.suse.com/1126284 SUSE Bug 1126284 In the Linux kernel before 4.20.14, expand_downwards in mm/mmap.c lacks a check for the mmap minimum address, which makes it easier for attackers to exploit kernel NULL pointer dereferences on non-SMAP platforms. This is related to a capability check for the wrong task. CVE-2019-9213 SUSE Linux Enterprise Live Patching 15:kernel-livepatch-4_12_14-23-default-9-25.2 SUSE Linux Enterprise Live Patching 15:kernel-livepatch-4_12_14-25_3-default-8-2.1 moderate To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2019/suse-su-20190740-1/ https://www.suse.com/security/cve/CVE-2019-9213.html CVE-2019-9213 https://bugzilla.suse.com/1128166 SUSE Bug 1128166 https://bugzilla.suse.com/1128378 SUSE Bug 1128378 https://bugzilla.suse.com/1129016 SUSE Bug 1129016