SUSE-SU-2019:0745-1

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SUSE-SU-2019:0745-1

Summary: Security update for the Linux Kernel (Live Patch 2 for SLE 15)

Details: This update for the Linux Kernel 4.12.14-25_6 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-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).

References: https://www.suse.com/support/update/announcement/2019/suse-su-20190745-1/, https://bugzilla.suse.com/1124729, https://bugzilla.suse.com/1124734, https://bugzilla.suse.com/1126284, https://bugzilla.suse.com/1128378, https://www.suse.com/security/cve/CVE-2019-6974, https://www.suse.com/security/cve/CVE-2019-7221, https://www.suse.com/security/cve/CVE-2019-8912, https://www.suse.com/security/cve/CVE-2019-9213