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Operation on a Resource after Expiration or Release Affecting kernel-abi-whitelists package, versions <0:3.10.0-693.62.1.el7

Severity

 Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.24% (62nd percentile)

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  • Snyk IDSNYK-RHEL7-KERNELABIWHITELISTS-5210916
  • published26 Jul 2021
  • disclosed18 Oct 2018
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Introduced: 18 Oct 2018

CVE-2018-18281  (opens in a new tab)
CWE-672  (opens in a new tab)

How to fix?

Upgrade RHEL:7 kernel-abi-whitelists to version 0:3.10.0-693.62.1.el7 or higher.
This issue was patched in RHSA-2020:0103.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-abi-whitelists package and not the kernel-abi-whitelists package as distributed by RHEL. See How to fix? for RHEL: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