Out-of-bounds Write Affecting torvalds/linux package, versions [2.6.27,3.15.10][3.16,3.16.74)[4.4,4.4.194)[4.9,4.9.194)[4.14,4.14.146)[4.19,4.19.75)[5.2,5.2.17)[5.3,5.3.1)


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.54% (78th percentile)

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  • Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-3004733
  • published26 Jan 2022
  • disclosed19 Sept 2019
  • creditUnknown

Introduced: 19 Sep 2019

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

How to fix?

Upgrade torvalds/linux to version 3.16.74, 4.4.194, 4.9.194, 4.14.146, 4.19.75, 5.2.17, 5.3.1 or higher.

Overview

Affected versions of this package are vulnerable to Out-of-bounds Write. 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 Scores

version 3.1