# CVE-2018-20784: kernel-core: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: i... CVE-2018-20784 is fixed in 37 products on 1 platform, first by RHSA-2019:1959, released July 30, 2019. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2018-20784 - Priority: High - CVSS: 9.8 (Important) - EPSS: 0.0417 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Jul 30, 2019 ## Description The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: insufficient input validation in kernel mode driver in Intel i915 graphics leads to privilege escalation (CVE-2019-11085) * kernel: DMA attack using peripheral devices (Thunderclap) (BZ#1690716) * kernel: infinite loop in update_blocked_averages() in kernel/sched/fair.c leading to denial of service (CVE-2018-20784) * kernel: a NULL pointer dereference in drivers/scsi/megaraid/megaraid_sas_base.c leading to DoS (CVE-2019-11810) * kernel: use-after-free in drivers/char/ipmi/ipmi_si_intf.c, ipmi_si_mem_io.c, ipmi_si_port_io.c (CVE-2019-11811) 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): * [DELL 8.0 z-stream BUG] - "CPU unsupported" message with CFL-H/S 8+2 due to updated Stepping (BZ#1711048) * RHEL8.0 Snapshot4 - [LTC Test] Guest crashes during vfio device hot-plug/un-plug operations. (kvm) (BZ#1714746) * Using Transactional Memory (TM) in a Guest Locks-up Host Core on a Power9 System (BZ#1714751) * VRSAVE register not properly saved and restored (BZ#1714753) * Fix potential spectre gadget in arch/s390/kvm/interrupt.c (BZ#1714754) * RHEL8.0 RC2 - kernel/KVM - count cache flush Spectre v2 mitigation (required for POWER9 DD2.3) (BZ#1715018) * iommu/amd: Set exclusion range correctly (BZ#1715336) * RHEL8.0 - sched/fair: Do not re-read ->h_load_next during hierarchical load calculation (BZ#1715337) * cross compile builds are broken (BZ#1715339) * Patch generated by 'make rh-test-patch' doesn't get applied during build (BZ#1715340) * hard lockup panic in during execution of CFS bandwidth period timer (BZ#1715345) * perf annotate -P does not give full paths (BZ#1716887) * [Dell EMC 8.0 BUG] File system corrupting with I/O Stress on H330 PERC on AMD Systems if IOMMU passthrough is disabled (BZ#1717344) * Fix Spectre v1 gadgets in drivers/gpu/drm/drm_bufs.c and drivers/gpu/drm/drm_ioctl.c (BZ#1717382) * BUG: SELinux doesn't handle NFS crossmnt well (BZ#1717777) * krb5{,i,p} doesn't work with older enctypes on aarch64 (BZ#1717800) * [RHEL-8.0][s390x]ltp-lite mtest06 testing hits EWD due to: rcu: INFO: rcu_sched self-detected stall on CPU (BZ#1717801) * RHEL 8 Snapshot-6: CN1200E SW iSCSI I/O performance degradation after a SCSI device/target reset rhel-8.0.0.z] (BZ#1717804) * dm cache metadata: Fix loading discard bitset (BZ#1717868) * jit'd java code on power9 ppc64le experiences stack corruption (BZ#1717869) * BUG: connect(AF_UNSPEC, ...) on a connected socket returns an error (BZ#1717870) * mm: BUG: unable to handle kernel paging request at 0000000057ac6e9d (BZ#1718237) * [HPE 8.0 BUG] DCPMM fsdax boot initialization takes a long time causing auto-mount to fail (BZ#1719635) * AMD Rome: WARNING: CPU: 1 PID: 0 at arch/x86/kernel/cpu/mcheck/mce.c:1510 mcheck_cpu_init+0x7a/0x460 (BZ#1721233) * [RHEL8.1] AMD Rome: EDAC amd64: Error: F0 not found, device 0x1460 (broken BIOS?) (BZ#1722365) * AMD Rome: Intermittent NMI received for unknown reason (BZ#1722367) * [DELL 8.0 BUG] - "CPU unsupported" message with WHL-U due to updated Stepping (BZ#1722372) Enhancement(s): * RHEL 8 - AMD Rome Support (BZ#1721972) Users of kernel are advised to upgrade to these updated packages, which fix these bugs and add this enhancement. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | bpftool RHEL 8 | 0:4.18.0-80.7.1.el8_0 | [RHSA-2019:1959](https://patchblox.com/security/data/fix/linux/rhsa-2019-1959.md) | Jul 30, 2019 | | Linux | bpftool ol 8 | 0:4.18.0-80.7.1.el8_0 | [ELSA-2019-1959](https://patchblox.com/security/data/fix/linux/elsa-2019-1959.md) | Aug 19, 2019 | | Linux | kernel RHEL 8 | 0:4.18.0-80.7.1.el8_0 | [RHSA-2019:1959](https://patchblox.com/security/data/fix/linux/rhsa-2019-1959.md) | Jul 30, 2019 | | Linux | kernel ol 8 | 0:4.18.0-80.7.1.el8_0 | [ELSA-2019-1959](https://patchblox.com/security/data/fix/linux/elsa-2019-1959.md) | Aug 19, 2019 | | Linux | kernel-abi-whitelists RHEL 8 | 0:4.18.0-80.7.1.el8_0 | [RHSA-2019:1959](https://patchblox.com/security/data/fix/linux/rhsa-2019-1959.md) | Jul 30, 2019 | | Linux | kernel-abi-whitelists ol 8 | 0:4.18.0-80.7.1.el8_0 | [ELSA-2019-1959](https://patchblox.com/security/data/fix/linux/elsa-2019-1959.md) | Aug 19, 2019 | | Linux | kernel-core RHEL 8 | 0:4.18.0-80.7.1.el8_0 | [RHSA-2019:1959](https://patchblox.com/security/data/fix/linux/rhsa-2019-1959.md) | Jul 30, 2019 | | Linux | kernel-core ol 8 | 0:4.18.0-80.7.1.el8_0 | [ELSA-2019-1959](https://patchblox.com/security/data/fix/linux/elsa-2019-1959.md) | Aug 19, 2019 | | Linux | kernel-cross-headers ol 8 | 0:4.18.0-80.7.1.el8_0 | [ELSA-2019-1959](https://patchblox.com/security/data/fix/linux/elsa-2019-1959.md) | Aug 19, 2019 | | Linux | kernel-debug RHEL 8 | 0:4.18.0-80.7.1.el8_0 | [RHSA-2019:1959](https://patchblox.com/security/data/fix/linux/rhsa-2019-1959.md) | Jul 30, 2019 | | Linux | kernel-debug ol 8 | 0:4.18.0-80.7.1.el8_0 | [ELSA-2019-1959](https://patchblox.com/security/data/fix/linux/elsa-2019-1959.md) | Aug 19, 2019 | | Linux | kernel-debug-core RHEL 8 | 0:4.18.0-80.7.1.el8_0 | [RHSA-2019:1959](https://patchblox.com/security/data/fix/linux/rhsa-2019-1959.md) | Jul 30, 2019 | | Linux | kernel-debug-core ol 8 | 0:4.18.0-80.7.1.el8_0 | [ELSA-2019-1959](https://patchblox.com/security/data/fix/linux/elsa-2019-1959.md) | Aug 19, 2019 | | Linux | kernel-debug-devel RHEL 8 | 0:4.18.0-80.7.1.el8_0 | [RHSA-2019:1959](https://patchblox.com/security/data/fix/linux/rhsa-2019-1959.md) | Jul 30, 2019 | | Linux | kernel-debug-devel ol 8 | 0:4.18.0-80.7.1.el8_0 | [ELSA-2019-1959](https://patchblox.com/security/data/fix/linux/elsa-2019-1959.md) | Aug 19, 2019 | | Linux | kernel-debug-modules RHEL 8 | 0:4.18.0-80.7.1.el8_0 | [RHSA-2019:1959](https://patchblox.com/security/data/fix/linux/rhsa-2019-1959.md) | Jul 30, 2019 | | Linux | kernel-debug-modules ol 8 | 0:4.18.0-80.7.1.el8_0 | [ELSA-2019-1959](https://patchblox.com/security/data/fix/linux/elsa-2019-1959.md) | Aug 19, 2019 | | Linux | kernel-debug-modules-extra RHEL 8 | 0:4.18.0-80.7.1.el8_0 | [RHSA-2019:1959](https://patchblox.com/security/data/fix/linux/rhsa-2019-1959.md) | Jul 30, 2019 | | Linux | kernel-debug-modules-extra ol 8 | 0:4.18.0-80.7.1.el8_0 | [ELSA-2019-1959](https://patchblox.com/security/data/fix/linux/elsa-2019-1959.md) | Aug 19, 2019 | | Linux | kernel-devel RHEL 8 | 0:4.18.0-80.7.1.el8_0 | [RHSA-2019:1959](https://patchblox.com/security/data/fix/linux/rhsa-2019-1959.md) | Jul 30, 2019 | | Linux | kernel-devel ol 8 | 0:4.18.0-80.7.1.el8_0 | [ELSA-2019-1959](https://patchblox.com/security/data/fix/linux/elsa-2019-1959.md) | Aug 19, 2019 | | Linux | kernel-doc RHEL 8 | 0:4.18.0-80.7.1.el8_0 | [RHSA-2019:1959](https://patchblox.com/security/data/fix/linux/rhsa-2019-1959.md) | Jul 30, 2019 | | Linux | kernel-doc ol 8 | 0:4.18.0-80.7.1.el8_0 | [ELSA-2019-1959](https://patchblox.com/security/data/fix/linux/elsa-2019-1959.md) | Aug 19, 2019 | | Linux | kernel-headers ol 8 | 0:4.18.0-80.7.1.el8_0 | [ELSA-2019-1959](https://patchblox.com/security/data/fix/linux/elsa-2019-1959.md) | Aug 19, 2019 | | Linux | kernel-modules RHEL 8 | 0:4.18.0-80.7.1.el8_0 | [RHSA-2019:1959](https://patchblox.com/security/data/fix/linux/rhsa-2019-1959.md) | Jul 30, 2019 | | Linux | kernel-modules ol 8 | 0:4.18.0-80.7.1.el8_0 | [ELSA-2019-1959](https://patchblox.com/security/data/fix/linux/elsa-2019-1959.md) | Aug 19, 2019 | | Linux | kernel-modules-extra RHEL 8 | 0:4.18.0-80.7.1.el8_0 | [RHSA-2019:1959](https://patchblox.com/security/data/fix/linux/rhsa-2019-1959.md) | Jul 30, 2019 | | Linux | kernel-modules-extra ol 8 | 0:4.18.0-80.7.1.el8_0 | [ELSA-2019-1959](https://patchblox.com/security/data/fix/linux/elsa-2019-1959.md) | Aug 19, 2019 | | Linux | kernel-rt RHEL 8 | 0:4.18.0-80.7.1.rt9.153.el8_0 | [RHSA-2019:1971](https://patchblox.com/security/data/fix/linux/rhsa-2019-1971.md) | Jul 30, 2019 | | Linux | kernel-rt-core RHEL 8 | 0:4.18.0-80.7.1.rt9.153.el8_0 | [RHSA-2019:1971](https://patchblox.com/security/data/fix/linux/rhsa-2019-1971.md) | Jul 30, 2019 | | Linux | kernel-rt-debug RHEL 8 | 0:4.18.0-80.7.1.rt9.153.el8_0 | [RHSA-2019:1971](https://patchblox.com/security/data/fix/linux/rhsa-2019-1971.md) | Jul 30, 2019 | | Linux | kernel-rt-debug-core RHEL 8 | 0:4.18.0-80.7.1.rt9.153.el8_0 | [RHSA-2019:1971](https://patchblox.com/security/data/fix/linux/rhsa-2019-1971.md) | Jul 30, 2019 | | Linux | kernel-rt-debug-devel RHEL 8 | 0:4.18.0-80.7.1.rt9.153.el8_0 | [RHSA-2019:1971](https://patchblox.com/security/data/fix/linux/rhsa-2019-1971.md) | Jul 30, 2019 | | Linux | kernel-rt-debug-kvm RHEL 8 | 0:4.18.0-80.7.1.rt9.153.el8_0 | [RHSA-2019:1971](https://patchblox.com/security/data/fix/linux/rhsa-2019-1971.md) | Jul 30, 2019 | | Linux | kernel-rt-debug-modules RHEL 8 | 0:4.18.0-80.7.1.rt9.153.el8_0 | [RHSA-2019:1971](https://patchblox.com/security/data/fix/linux/rhsa-2019-1971.md) | Jul 30, 2019 | | Linux | kernel-rt-debug-modules-extra RHEL 8 | 0:4.18.0-80.7.1.rt9.153.el8_0 | [RHSA-2019:1971](https://patchblox.com/security/data/fix/linux/rhsa-2019-1971.md) | Jul 30, 2019 | | Linux | kernel-rt-devel RHEL 8 | 0:4.18.0-80.7.1.rt9.153.el8_0 | [RHSA-2019:1971](https://patchblox.com/security/data/fix/linux/rhsa-2019-1971.md) | Jul 30, 2019 | | Linux | kernel-rt-kvm RHEL 8 | 0:4.18.0-80.7.1.rt9.153.el8_0 | [RHSA-2019:1971](https://patchblox.com/security/data/fix/linux/rhsa-2019-1971.md) | Jul 30, 2019 | | Linux | kernel-rt-modules RHEL 8 | 0:4.18.0-80.7.1.rt9.153.el8_0 | [RHSA-2019:1971](https://patchblox.com/security/data/fix/linux/rhsa-2019-1971.md) | Jul 30, 2019 | | Linux | kernel-rt-modules-extra RHEL 8 | 0:4.18.0-80.7.1.rt9.153.el8_0 | [RHSA-2019:1971](https://patchblox.com/security/data/fix/linux/rhsa-2019-1971.md) | Jul 30, 2019 | | Linux | kernel-tools RHEL 8 | 0:4.18.0-80.7.1.el8_0 | [RHSA-2019:1959](https://patchblox.com/security/data/fix/linux/rhsa-2019-1959.md) | Jul 30, 2019 | | Linux | kernel-tools ol 8 | 0:4.18.0-80.7.1.el8_0 | [ELSA-2019-1959](https://patchblox.com/security/data/fix/linux/elsa-2019-1959.md) | Aug 19, 2019 | | Linux | kernel-tools-libs RHEL 8 | 0:4.18.0-80.7.1.el8_0 | [RHSA-2019:1959](https://patchblox.com/security/data/fix/linux/rhsa-2019-1959.md) | Jul 30, 2019 | | Linux | kernel-tools-libs ol 8 | 0:4.18.0-80.7.1.el8_0 | [ELSA-2019-1959](https://patchblox.com/security/data/fix/linux/elsa-2019-1959.md) | Aug 19, 2019 | | Linux | kernel-tools-libs-devel RHEL 8 | 0:4.18.0-80.7.1.el8_0 | [RHSA-2019:1959](https://patchblox.com/security/data/fix/linux/rhsa-2019-1959.md) | Jul 30, 2019 | | Linux | kernel-tools-libs-devel ol 8 | 0:4.18.0-80.7.1.el8_0 | [ELSA-2019-1959](https://patchblox.com/security/data/fix/linux/elsa-2019-1959.md) | Aug 19, 2019 | | Linux | kernel-zfcpdump RHEL 8 | 0:4.18.0-80.7.1.el8_0 | [RHSA-2019:1959](https://patchblox.com/security/data/fix/linux/rhsa-2019-1959.md) | Jul 30, 2019 | | Linux | kernel-zfcpdump-core RHEL 8 | 0:4.18.0-80.7.1.el8_0 | [RHSA-2019:1959](https://patchblox.com/security/data/fix/linux/rhsa-2019-1959.md) | Jul 30, 2019 | | Linux | kernel-zfcpdump-devel RHEL 8 | 0:4.18.0-80.7.1.el8_0 | [RHSA-2019:1959](https://patchblox.com/security/data/fix/linux/rhsa-2019-1959.md) | Jul 30, 2019 | | Linux | kernel-zfcpdump-modules RHEL 8 | 0:4.18.0-80.7.1.el8_0 | [RHSA-2019:1959](https://patchblox.com/security/data/fix/linux/rhsa-2019-1959.md) | Jul 30, 2019 | | Linux | kernel-zfcpdump-modules-extra RHEL 8 | 0:4.18.0-80.7.1.el8_0 | [RHSA-2019:1959](https://patchblox.com/security/data/fix/linux/rhsa-2019-1959.md) | Jul 30, 2019 | | Linux | perf RHEL 8 | 0:4.18.0-80.7.1.el8_0 | [RHSA-2019:1959](https://patchblox.com/security/data/fix/linux/rhsa-2019-1959.md) | Jul 30, 2019 | | Linux | perf ol 8 | 0:4.18.0-80.7.1.el8_0 | [ELSA-2019-1959](https://patchblox.com/security/data/fix/linux/elsa-2019-1959.md) | Aug 19, 2019 | | Linux | python3-perf RHEL 8 | 0:4.18.0-80.7.1.el8_0 | [RHSA-2019:1959](https://patchblox.com/security/data/fix/linux/rhsa-2019-1959.md) | Jul 30, 2019 | | Linux | python3-perf ol 8 | 0:4.18.0-80.7.1.el8_0 | [ELSA-2019-1959](https://patchblox.com/security/data/fix/linux/elsa-2019-1959.md) | Aug 19, 2019 | --- Data as of 2026-11-07T12:40:37Z UTC. 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