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Incomplete Cleanup Affecting kernel-uek-debug-devel package, versions <0:4.1.12-124.39.5.el6uek

Severity

 Recommended
0.0
high
0
10

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.11% (46th percentile)

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  • Snyk IDSNYK-ORACLE6-KERNELUEKDEBUGDEVEL-2575115
  • published10 Apr 2022
  • disclosed30 Oct 2018
Report a new vulnerability Found a mistake?

Introduced: 30 Oct 2018

CVE-2018-18281  (opens in a new tab)
CWE-459  (opens in a new tab)

How to fix?

Upgrade Oracle:6 kernel-uek-debug-devel to version 0:4.1.12-124.39.5.el6uek or higher.
This issue was patched in ELSA-2020-5708.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-uek-debug-devel package and not the kernel-uek-debug-devel package as distributed by Oracle. See How to fix? for Oracle:6 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