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01 Record

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.

UnratedPUBLISHEDCNA: redhat
CNA base scoreUnratedNo CNA CVSS vector

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
  • CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')Class
  • CWE-415Double FreeVariant
Data version
5.1
Document digest
a7ab9ee747f66e6d7bb49663b6980a251d042a8f0d195f7fc95e40da63fd0403

05 Affected products

VendorProductVersionsPlatforms
debiandebian_linuxNot specified—
linuxlinux_kernelNot specified—
redhatenterprise_linuxNot specified—
redhatenterprise_mrgNot specified—
redhatrhel_ausNot specified—
redhatrhel_eusNot specified—
redhatrhel_extras_rtNot specified—
redhatrhel_mission_criticalNot specified—
redhatrhel_tusNot specified—

06 References

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.