CVE-2017-15126 Detail

Current Description

A use-after-free flaw was found in fs/userfaultfd.c in the Linux kernel before 4.13.6. The issue is related to the handling of fork failure when dealing with event messages. Failure to fork correctly can lead to a situation where a fork event will be removed from an already freed list of events with userfaultfd_ctx_put().


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  8.1 HIGH
Vector:  CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

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://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=384632e67e0829deb8015ee6ad916b180049d252 Vendor Advisory 
http://www.securityfocus.com/bid/102516
https://access.redhat.com/errata/RHSA-2018:0676
https://access.redhat.com/errata/RHSA-2018:1062
https://access.redhat.com/security/cve/CVE-2017-15126 Third Party Advisory 
https://bugzilla.redhat.com/show_bug.cgi?id=1523481 Issue Tracking  Third Party Advisory 
https://github.com/torvalds/linux/commit/384632e67e0829deb8015ee6ad916b180049d252 Third Party Advisory 
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.6 Vendor Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-416 Use After Free cwe source acceptance level NIST  
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer Reference acceptance level Red Hat, Inc.  

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Change History

4 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2017-15126
NVD Published Date:
01/14/2018
NVD Last Modified:
05/06/2018
Source:
Red Hat, Inc.