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Vulnerability record · CVE-2017-2634 · published 27 July 2018

CVE-2017-2634: Linux kernel null pointer dereference vulnerability

Linux · Linux Kernel

It was found that the Linux kernel's Datagram Congestion Control Protocol (DCCP) implementation before 2.6.22.17 used the IPv4-only inet_sk_rebuild_header() function for both IPv4 and IPv6 DCCP connections, which could result in memory corruptions. A remote attacker could use this flaw to crash the system.

7.5 CVSS 3.0 High EPSS 5.2% · top 7.8% CWE-476 · NULL pointer dereferenceCWE-119 · Memory buffer overflow
7.5CVSS 3.0 base score, v2 7.8
5.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
5Affected product versions listed by NVD
14References
17 Jun 2026Last modified by NVD

Description

It was found that the Linux kernel's Datagram Congestion Control Protocol (DCCP) implementation before 2.6.22.17 used the IPv4-only inet_sk_rebuild_header() function for both IPv4 and IPv6 DCCP connections, which could result in memory corruptions. A remote attacker could use this flaw to crash the system.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

5 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://rhn.redhat.com/errata/RHSA-2017-0323.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2017-0346.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2017-0347.html Third Party Advisory
http://www.securityfocus.com/bid/96529 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1037909 Third Party AdvisoryVDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2634 Issue TrackingPatchThird Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=f53dc67c5e7babafe239b93a11678b0e05bead51 PatchThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2017-0323.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2017-0346.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2017-0347.html Third Party Advisory
http://www.securityfocus.com/bid/96529 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1037909 Third Party AdvisoryVDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2634 Issue TrackingPatchThird Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=f53dc67c5e7babafe239b93a11678b0e05bead51 PatchThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2017-2634), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.