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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.03%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.0 HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.03% probability · 64th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-362, CWE-415
- Affected
- linux/linux kernel · debian/debian linux
- Source
- secalert@redhat.com
EPSS 1.0% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.debian.org/security/2017/dsa-3804Third Party Advisory
- http://www.openwall.com/lists/oss-security/2017/03/07/6Mailing List, Patch, Third Party Advisory
- http://www.securityfocus.com/bid/96732Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037963Third Party Advisory, VDB Entry
- https://a13xp0p0v.github.io/2017/03/24/CVE-2017-2636.htmlThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0892Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0931Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0932Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0933Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0986Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1125Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1126Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1232Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1233Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1488Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1428319Issue Tracking, Mitigation, Third Party Advisory
- http://www.debian.org/security/2017/dsa-3804Third Party Advisory
- http://www.openwall.com/lists/oss-security/2017/03/07/6Mailing List, Patch, Third Party Advisory
- http://www.securityfocus.com/bid/96732Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037963Third Party Advisory, VDB Entry
- https://a13xp0p0v.github.io/2017/03/24/CVE-2017-2636.htmlThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0892Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0931Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0932Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0933Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0986Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1125Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1126Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1232Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1233Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.