CVE-2017-2636

HIGH

Linux Kernel <= 4.10.1 - Race Condition in HDLC Line Discipline

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2017-2636. PoCs published by alexzorin.

AI-analyzed exploit summary This repository provides an Ansible role to apply a workaround for CVE-2017-2636 by blacklisting the `n_hdlc` module on RHEL 6/7 and variants. It does not contain exploit code but documents a mitigation strategy.

Description

Race condition in drivers/tty/n_hdlc.c in the Linux kernel through 4.10.1 allows local users to gain privileges or cause a denial of service (double free) by setting the HDLC line discipline.

Exploits (1)

nomisec WRITEUP 1 stars
by alexzorin · poc
https://github.com/alexzorin/cve-2017-2636-el

This repository provides an Ansible role to apply a workaround for CVE-2017-2636 by blacklisting the `n_hdlc` module on RHEL 6/7 and variants. It does not contain exploit code but documents a mitigation strategy.

Classification
Writeup 100%
Attack Type
Other
Complexity
Trivial
Reliability
Theoretical
Target: Red Hat Enterprise Linux 6/7 and variants (CentOS, CloudLinux)
Auth required
Prerequisites: Access to apply Ansible roles on target systems
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (16)

Core 16
Core References
Third Party Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2017:0892
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/96732
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1037963
Third Party Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2017:0932
Mailing List, Patch, Third Party Advisory mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2017/03/07/6
Issue Tracking, Mitigation, Third Party Advisory x_refsource_confirm
https://bugzilla.redhat.com/show_bug.cgi?id=1428319
Third Party Advisory x_refsource_misc
https://a13xp0p0v.github.io/2017/03/24/CVE-2017-2636.html
Third Party Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2017:1125
Third Party Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2017:0933
Third Party Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2017:1232
Third Party Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2017:0931
Third Party Advisory vendor-advisory x_refsource_debian
http://www.debian.org/security/2017/dsa-3804
Third Party Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2017:1233
Third Party Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2017:1488
Third Party Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2017:0986
Third Party Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2017:1126

Scores

CVSS v3 7.0
EPSS 0.0103
EPSS Percentile 59.3%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-362 CWE-415
Status published
Products (2)
debian/debian_linux 8.0
linux/linux_kernel 2.6.31 - 3.2.87
Published Mar 07, 2017
Tracked Since Feb 18, 2026