Out-of-bounds Write Affecting python3-perf package, versions <0:4.18.0-147.el8


Severity

Recommended
0.0
high
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
0.08% (37th percentile)

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  • Snyk IDSNYK-CENTOS8-PYTHON3PERF-1999685
  • published26 Jul 2021
  • disclosed17 Sept 2019

Introduced: 17 Sep 2019

CVE-2019-14821  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Centos:8 python3-perf to version 0:4.18.0-147.el8 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3-perf package and not the python3-perf package as distributed by Centos. See How to fix? for Centos:8 relevant fixed versions and status.

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.

References

CVSS Scores

version 3.1