CVE-2017-15126
Linux Kernel Userfaultfd Use-After-Free Vulnerability
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().
INFO
Published Date :
Jan. 14, 2018, 6:29 a.m.
Last Modified :
Feb. 5, 2024, 7:52 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
2.2
Public PoC/Exploit Available at Github
CVE-2017-15126 has a 1 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2017-15126.
| URL | Resource |
|---|---|
| http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=384632e67e0829deb8015ee6ad916b180049d252 | Vendor Advisory |
| http://www.securityfocus.com/bid/102516 | Third Party Advisory VDB Entry |
| https://access.redhat.com/errata/RHSA-2018:0676 | Third Party Advisory |
| https://access.redhat.com/errata/RHSA-2018:1062 | Third Party Advisory |
| 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 |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Place where I track kernel config and WHY I configured it in certain ways.
Shell
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2017-15126 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2017-15126 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Feb. 05, 2024
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.11 up to (excluding) 4.13.6 *cpe:2.3:o:linux:linux_kernel:4.13.6:*:*:*:*:*:*:* OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.11 up to (excluding) 4.13.6 -
CVE Modified by [email protected]
Feb. 12, 2023
Action Type Old Value New Value Changed Description A flaw was found in the Linux kernel's handling of fork failure when dealing with event messages in the userfaultfd code. Failure to fork correctly can create a fork event that will be removed from an already freed list of events. 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(). Removed CVSS V3 Red Hat, Inc. AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE Red Hat, Inc. CWE-119 -
CVE Modified by [email protected]
Feb. 02, 2023
Action Type Old Value New Value Changed 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(). A flaw was found in the Linux kernel's handling of fork failure when dealing with event messages in the userfaultfd code. Failure to fork correctly can create a fork event that will be removed from an already freed list of events. Added CVSS V3 Red Hat, Inc. AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H Removed CWE Red Hat, Inc. CWE-119 Removed CWE Reason CWE-119 / Assessment performed prior to CVMAP efforts -
Modified Analysis by [email protected]
Jan. 19, 2023
Action Type Old Value New Value Removed CVSS V3 NIST AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Added CVSS V3.1 NIST AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type http://www.securityfocus.com/bid/102516 No Types Assigned http://www.securityfocus.com/bid/102516 Third Party Advisory, VDB Entry Changed Reference Type https://access.redhat.com/errata/RHSA-2018:0676 No Types Assigned https://access.redhat.com/errata/RHSA-2018:0676 Third Party Advisory Changed Reference Type https://access.redhat.com/errata/RHSA-2018:1062 No Types Assigned https://access.redhat.com/errata/RHSA-2018:1062 Third Party Advisory Changed CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:4.13.6:*:*:*:*:*:*:* OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.11 up to (excluding) 4.13.6 *cpe:2.3:o:linux:linux_kernel:4.13.6:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Oct. 09, 2019
Action Type Old Value New Value Added CWE Red Hat, Inc. CWE-119 -
CVE Modified by [email protected]
May. 07, 2018
Action Type Old Value New Value Added Reference http://www.securityfocus.com/bid/102516 [No Types Assigned] -
CVE Modified by [email protected]
Apr. 12, 2018
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2018:1062 [No Types Assigned] Added Reference https://access.redhat.com/errata/RHSA-2018:0676 [No Types Assigned] -
Initial Analysis by [email protected]
Feb. 06, 2018
Action Type Old Value New Value Added CVSS V2 (AV:N/AC:M/Au:N/C:C/I:C/A:C) Added CVSS V3 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://github.com/torvalds/linux/commit/384632e67e0829deb8015ee6ad916b180049d252 No Types Assigned https://github.com/torvalds/linux/commit/384632e67e0829deb8015ee6ad916b180049d252 Third Party Advisory Changed Reference Type https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.6 No Types Assigned https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.6 Vendor Advisory Changed Reference Type http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=384632e67e0829deb8015ee6ad916b180049d252 No Types Assigned http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=384632e67e0829deb8015ee6ad916b180049d252 Vendor Advisory Changed Reference Type https://access.redhat.com/security/cve/CVE-2017-15126 No Types Assigned https://access.redhat.com/security/cve/CVE-2017-15126 Third Party Advisory Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=1523481 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=1523481 Issue Tracking, Third Party Advisory Added CWE CWE-416 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:4.13.6:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2017-15126 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2017-15126
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
2.53 }} 0.73%
score
0.88813
percentile