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Operation on a Resource after Expiration or Release Affecting kernel-rt-trace-devel package, versions <0:3.10.0-1062.rt56.1022.el7

Severity

0.0
high
0
10

    Threat Intelligence

    EPSS
    0.11% (45th percentile)

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  • Snyk ID SNYK-CENTOS7-KERNELRTTRACEDEVEL-2139701
  • published 26 Jul 2021
  • disclosed 18 Oct 2018
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Introduced: 18 Oct 2018

CVE-2018-18281 Open this link in a new tab
CWE-672 Open this link in a new tab

How to fix?

Upgrade Centos:7 kernel-rt-trace-devel to version 0:3.10.0-1062.rt56.1022.el7 or higher.

NVD Description

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

Since Linux kernel version 3.2, the mremap() syscall performs TLB flushes after dropping pagetable locks. If a syscall such as ftruncate() removes entries from the pagetables of a task that is in the middle of mremap(), a stale TLB entry can remain for a short time that permits access to a physical page after it has been released back to the page allocator and reused. This is fixed in the following kernel versions: 4.9.135, 4.14.78, 4.18.16, 4.19.

References

CVSS Scores

version 3.1
Expand this section

Snyk

7.8 high
  • Attack Vector (AV)
    Local
  • Attack Complexity (AC)
    High
  • Privileges Required (PR)
    Low
  • User Interaction (UI)
    None
  • Scope (S)
    Changed
  • Confidentiality (C)
    High
  • Integrity (I)
    High
  • Availability (A)
    High
Expand this section

NVD

7.8 high
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SUSE

5.6 medium
Expand this section

Red Hat

7.8 high