CVE-2019-14821
An out-of-bounds access issue was found in the Linux kernel, all versions through 5.3, in the way Linux kernel's KVM hypervisor implements the Coalesced MMIO write operation.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.76%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
An out-of-bounds access issue was found in the Linux kernel, all versions through 5.3, in the way Linux kernel's KVM hypervisor implements the Coalesced MMIO write operation. It operates on an MMIO ring buffer 'struct kvm_coalesced_mmio' object, wherein write indices 'ring->first' and 'ring->last' value could be supplied by a host user-space process. An unprivileged host user or process with access to '/dev/kvm' device could use this flaw to crash the host kernel, resulting in a denial of service or potentially escalating privileges on the system.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 0.76% probability · 53th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- linux/linux kernel · redhat/virtualization host · redhat/enterprise linux · redhat/enterprise linux desktop · redhat/enterprise linux eus · redhat/enterprise linux for real time · redhat/enterprise linux server · redhat/enterprise linux server aus · redhat/enterprise linux server tus · redhat/enterprise linux workstation · canonical/ubuntu linux · opensuse/leap · fedoraproject/fedora · debian/debian linux · netapp/aff a700s firmware · netapp/h300s firmware · netapp/h500s firmware · netapp/h700s firmware · netapp/h300e firmware · netapp/h500e firmware · +8 more
- Source
- secalert@redhat.com
References
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00036.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00037.htmlMailing List, Third Party Advisory
- http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.htmlThird Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/155212/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.htmlThird Party Advisory, VDB Entry
- http://www.openwall.com/lists/oss-security/2019/09/20/1Mailing List, Patch, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:3309Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:3517Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:3978Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:3979Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:4154Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:4256Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0027Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0204Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14821Issue Tracking, Mitigation, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/09/msg00025.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/10/msg00000.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TRZQQQANZWQMPILZV7OTS3RGGRLLE2Q7/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YW3QNMPENPFEGVTOFPSNOBL7JEIJS25P/Mailing List, Third Party Advisory
- https://seclists.org/bugtraq/2019/Nov/11Mailing List, Third Party Advisory
- https://seclists.org/bugtraq/2019/Sep/41Issue Tracking, Mailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20191004-0001/Third Party Advisory
- https://usn.ubuntu.com/4157-1/Third Party Advisory
- https://usn.ubuntu.com/4157-2/Third Party Advisory
- https://usn.ubuntu.com/4162-1/Third Party Advisory
- https://usn.ubuntu.com/4162-2/Third Party Advisory
- https://usn.ubuntu.com/4163-1/Third Party Advisory
- https://usn.ubuntu.com/4163-2/Third Party Advisory
- https://www.debian.org/security/2019/dsa-4531Third Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2020.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00036.htmlMailing List, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.