Race Condition Affecting kernel-rt-debug-kvm package, versions <0:4.18.0-147.rt24.93.el8


Severity

Recommended
high

Based on CentOS security rating.

Threat Intelligence

EPSS
0.09% (38th percentile)

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  • Snyk IDSNYK-CENTOS8-KERNELRTDEBUGKVM-1991761
  • published26 Jul 2021
  • disclosed19 Apr 2019

Introduced: 19 Apr 2019

CVE-2019-11599  (opens in a new tab)
CWE-362  (opens in a new tab)
CWE-667  (opens in a new tab)

How to fix?

Upgrade Centos:8 kernel-rt-debug-kvm to version 0:4.18.0-147.rt24.93.el8 or higher.

NVD Description

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

The coredump implementation in the Linux kernel before 5.0.10 does not use locking or other mechanisms to prevent vma layout or vma flags changes while it runs, which allows local users to obtain sensitive information, cause a denial of service, or possibly have unspecified other impact by triggering a race condition with mmget_not_zero or get_task_mm calls. This is related to fs/userfaultfd.c, mm/mmap.c, fs/proc/task_mmu.c, and drivers/infiniband/core/uverbs_main.c.

References

CVSS Scores

version 3.1