Race Condition Affecting kernel-bootwrapper package, versions <0:3.10.0-327.36.3.el7


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating

    Threat Intelligence

    Exploit Maturity
    Mature
    EPSS
    81.66% (99th percentile)

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  • Snyk ID SNYK-RHEL7-KERNELBOOTWRAPPER-4627311
  • published 26 Jul 2021
  • disclosed 19 Oct 2016

How to fix?

Upgrade RHEL:7 kernel-bootwrapper to version 0:3.10.0-327.36.3.el7 or higher.
This issue was patched in RHSA-2016:2098.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-bootwrapper package and not the kernel-bootwrapper package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect handling of a copy-on-write (COW) feature to write to a read-only memory mapping, as exploited in the wild in October 2016, aka "Dirty COW."

References

CVSS Scores

version 3.1
Expand this section

NVD

7 high
  • Attack Vector (AV)
    Local
  • Attack Complexity (AC)
    High
  • Privileges Required (PR)
    Low
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    High
  • Integrity (I)
    High
  • Availability (A)
    High