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.
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Advisories
| Source | ID | Title |
|---|---|---|
Debian DLA |
DLA-1930-1 | linux security update |
Debian DLA |
DLA-1940-1 | linux-4.9 security update |
Debian DSA |
DSA-4531-1 | linux security update |
EUVD |
EUVD-2019-5949 | 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. |
Ubuntu USN |
USN-4157-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-4157-2 | Linux kernel (HWE) vulnerabilities |
Ubuntu USN |
USN-4162-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-4162-2 | Linux kernel (Azure) vulnerabilities |
Ubuntu USN |
USN-4163-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-4163-2 | Linux kernel (Xenial HWE) vulnerabilities |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
No history.
Projects
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Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2024-08-05T00:26:39.131Z
Reserved: 2019-08-10T00:00:00.000Z
Link: CVE-2019-14821
No data.
Status : Modified
Published: 2019-09-19T18:15:10.700
Modified: 2024-11-21T04:27:25.990
Link: CVE-2019-14821
OpenCVE Enrichment
No data.
Weaknesses
Debian DLA
Debian DSA
EUVD
Ubuntu USN