CVE-2018-18281 Detail

Current Description

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.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  7.8 HIGH
Vector:  CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H


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Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://packetstormsecurity.com/files/150001/Linux-mremap-TLB-Flush-Too-Late.html Patch  Third Party Advisory  VDB Entry 
http://www.openwall.com/lists/oss-security/2018/10/29/5 Mailing List  Patch  Third Party Advisory 
http://www.securityfocus.com/bid/105761 Third Party Advisory  VDB Entry 
http://www.securityfocus.com/bid/106503 Third Party Advisory  VDB Entry 
https://access.redhat.com/errata/RHSA-2019:0831
https://access.redhat.com/errata/RHSA-2019:2029
https://access.redhat.com/errata/RHSA-2019:2043
https://access.redhat.com/errata/RHSA-2020:0036
https://access.redhat.com/errata/RHSA-2020:0100
https://access.redhat.com/errata/RHSA-2020:0103
https://access.redhat.com/errata/RHSA-2020:0179
https://bugs.chromium.org/p/project-zero/issues/detail?id=1695 Exploit  Patch  Third Party Advisory 
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.78 Patch  Vendor Advisory 
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.16 Patch  Vendor Advisory 
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.135 Patch  Vendor Advisory 
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=eb66ae030829605d61fbef1909ce310e29f78821 Patch  Vendor Advisory 
https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html Mailing List  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html Mailing List  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html Mailing List  Third Party Advisory 
https://usn.ubuntu.com/3832-1/ Third Party Advisory 
https://usn.ubuntu.com/3835-1/ Third Party Advisory 
https://usn.ubuntu.com/3871-1/ Third Party Advisory 
https://usn.ubuntu.com/3871-3/ Third Party Advisory 
https://usn.ubuntu.com/3871-4/ Third Party Advisory 
https://usn.ubuntu.com/3871-5/ Third Party Advisory 
https://usn.ubuntu.com/3880-1/ Third Party Advisory 
https://usn.ubuntu.com/3880-2/ Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-20 Improper Input Validation cwe source acceptance level NIST  

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Change History

19 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-18281
NVD Published Date:
10/30/2018
NVD Last Modified:
04/23/2019
Source:
MITRE