CVE-2017-2636
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.
02 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.
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 1.02% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 63.5% of scored records. A rank, not a probability.
- NVD base score
- 7.0 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Important. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2017-03-07 22:00Z9 YR AGO
- Last updated
- 2024-08-05 14:02Z2 YR AGO
- Reserved
- 2016-12-01
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- Data version
- 5.1
- Document digest
- a7ab9ee747f66e6d7bb49663b6980a251d042a8f0d195f7fc95e40da63fd0403
05 Affected products
06 References
- access.redhat.comRHSA-2017:0892https://access.redhat.com/errata/RHSA-2017:0892
- www.securityfocus.com96732http://www.securityfocus.com/bid/96732
- www.securitytracker.com1037963http://www.securitytracker.com/id/1037963
- access.redhat.comRHSA-2017:0932https://access.redhat.com/errata/RHSA-2017:0932
- www.openwall.com[oss-security] 20170307 Linux kernel: CVE-2017-2636: local privilege escalation flaw in n_hdlchttp://www.openwall.com/lists/oss-security/2017/03/07/6
- bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1428319
- a13xp0p0v.github.iohttps://a13xp0p0v.github.io/2017/03/24/CVE-2017-2636.html
- access.redhat.comRHSA-2017:1125https://access.redhat.com/errata/RHSA-2017:1125
- access.redhat.comRHSA-2017:0933https://access.redhat.com/errata/RHSA-2017:0933
- access.redhat.comRHSA-2017:1232https://access.redhat.com/errata/RHSA-2017:1232
- access.redhat.comRHSA-2017:0931https://access.redhat.com/errata/RHSA-2017:0931
- www.debian.orgDSA-3804http://www.debian.org/security/2017/dsa-3804
- access.redhat.comRHSA-2017:1233https://access.redhat.com/errata/RHSA-2017:1233
- access.redhat.comRHSA-2017:1488https://access.redhat.com/errata/RHSA-2017:1488
- access.redhat.comRHSA-2017:0986https://access.redhat.com/errata/RHSA-2017:0986
- access.redhat.comRHSA-2017:1126https://access.redhat.com/errata/RHSA-2017:1126
07 Fixed in
Arch Linux
- linux Fixed in 4.10.2-1
- linux-lts Fixed in 4.9.14-1
- linux-zen Fixed in 4.10.2-1
Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.
Debian 12
- linux Fixed in 4.9.16-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- linux Fixed in 4.9.16-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- linux Fixed in 4.9.16-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 14.04 LTS
- linux Fixed in 3.13.0-112.159
- linux-lts-xenial Fixed in 4.4.0-66.87~14.04.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- linux Fixed in 4.4.0-66.87
- linux-aws Fixed in 4.4.0-1007.16
- linux-gke Fixed in 4.4.0-1005.6
- linux-hwe Fixed in 4.8.0-41.44~16.04.1
- linux-raspi2 Fixed in 4.4.0-1046.53
- linux-snapdragon Fixed in 4.4.0-1050.54
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.