CVE-2018-18281

High

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.

Package Linux Kernel
Published 2018-10-30
Last modified 2024-11-21
CVSS version 3.0
Patch available
Awaiting data

CVSS 3.0 score

7.8

out of 10
High
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Vector string
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness type

CWE-459

CVE-2018-18281 is classified as CWE-459

See CWE-459 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2018-18281 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

7 patch commits total View all on NVD

Frequently asked questions

  • What is CVE-2018-18281?

    CVE-2018-18281 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . CVE-2018-18281 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2018-18281?

    CVE-2018-18281 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.0). The vector string is CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H .

  • Is there a patch available for CVE-2018-18281?

    No patch is currently available for CVE-2018-18281. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

  • Is CVE-2018-18281 actively exploited?

    No — CVE-2018-18281 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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