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CVE-2017-2634

It was found that the Linux kernel's Datagram Congestion Control Protocol (DCCP) implementation...

7.5 HighFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

5.15%Up 3.5 points since Apr 14, 2021
90%50%10%1%

What each source reports

CVE List Score used 7.5

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.

Record
CVE-2017-2634
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-476
Updated
2026-11-02
EUVDEUVD-2017-11795 7.5

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.

Record
EUVD-2017-11795
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-03
GitHub AdvisoriesGHSA-qmpj-vx37-329m 7.5

It was found that the Linux kernel's Datagram Congestion Control Protocol (DCCP) implementation...

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.

Record
GHSA-qmpj-vx37-329m
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-119, CWE-476
Updated
2026-11-02
NVD 7.5

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.

Record
CVE-2017-2634
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0
7.8 HighAV:N/AC:L/Au:N/C:N/I:N/A:C
Weakness
CWE-476, CWE-119
Updated
2026-11-02
OSVRHSA-2017:0323 7.8

Red Hat Security Advisory: kernel security update

Record
RHSA-2017:0323
CVSS 3.0
7.8 HighCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2017:0346 7.8

Red Hat Security Advisory: kernel security and bug fix update

Record
RHSA-2017:0346
CVSS 3.0
7.8 HighCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2017:0347 7.8

Red Hat Security Advisory: kernel security and bug fix update

Record
RHSA-2017:0347
CVSS 3.0
7.8 HighCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2017-2634 7.5

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.

Record
UBUNTU-CVE-2017-2634
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
kernel
Red Hat:enterprise_linux:5::client
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel-PAE
Red Hat:enterprise_linux:5::client
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel-PAE-debuginfo
Red Hat:enterprise_linux:5::client
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel-PAE-devel
Red Hat:enterprise_linux:5::client
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel-debug
Red Hat:enterprise_linux:5::client
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel-debug-debuginfo
Red Hat:enterprise_linux:5::client
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel-debug-devel
Red Hat:enterprise_linux:5::client
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel-debuginfo
Red Hat:enterprise_linux:5::client
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel-debuginfo-common
Red Hat:enterprise_linux:5::client
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel-devel
Red Hat:enterprise_linux:5::client
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
Show 53 moreShow less
Affected packages
PackageAffectedFixed
kernel-doc
Red Hat:enterprise_linux:5::client
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel-headers
Red Hat:enterprise_linux:5::client
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel-xen
Red Hat:enterprise_linux:5::client
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel-xen-debuginfo
Red Hat:enterprise_linux:5::client
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel-xen-devel
Red Hat:enterprise_linux:5::client
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel
Red Hat:enterprise_linux:5::server
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel-PAE
Red Hat:enterprise_linux:5::server
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel-PAE-debuginfo
Red Hat:enterprise_linux:5::server
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel-PAE-devel
Red Hat:enterprise_linux:5::server
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel-debug
Red Hat:enterprise_linux:5::server
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel-debug-debuginfo
Red Hat:enterprise_linux:5::server
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel-debug-devel
Red Hat:enterprise_linux:5::server
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel-debuginfo
Red Hat:enterprise_linux:5::server
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel-debuginfo-common
Red Hat:enterprise_linux:5::server
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel-devel
Red Hat:enterprise_linux:5::server
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel-doc
Red Hat:enterprise_linux:5::server
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel-headers
Red Hat:enterprise_linux:5::server
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel-kdump
Red Hat:enterprise_linux:5::server
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel-kdump-debuginfo
Red Hat:enterprise_linux:5::server
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel-kdump-devel
Red Hat:enterprise_linux:5::server
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel-xen
Red Hat:enterprise_linux:5::server
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel-xen-debuginfo
Red Hat:enterprise_linux:5::server
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel-xen-devel
Red Hat:enterprise_linux:5::server
 before 0:2.6.18-419.el5
0:2.6.18-419.el5
kernel
Red Hat:rhel_aus:5.9
 before 0:2.6.18-348.33.1.el5
0:2.6.18-348.33.1.el5
kernel-PAE
Red Hat:rhel_aus:5.9
 before 0:2.6.18-348.33.1.el5
0:2.6.18-348.33.1.el5
kernel-PAE-debuginfo
Red Hat:rhel_aus:5.9
 before 0:2.6.18-348.33.1.el5
0:2.6.18-348.33.1.el5
kernel-PAE-devel
Red Hat:rhel_aus:5.9
 before 0:2.6.18-348.33.1.el5
0:2.6.18-348.33.1.el5
kernel-debug
Red Hat:rhel_aus:5.9
 before 0:2.6.18-348.33.1.el5
0:2.6.18-348.33.1.el5
kernel-debug-debuginfo
Red Hat:rhel_aus:5.9
 before 0:2.6.18-348.33.1.el5
0:2.6.18-348.33.1.el5
kernel-debug-devel
Red Hat:rhel_aus:5.9
 before 0:2.6.18-348.33.1.el5
0:2.6.18-348.33.1.el5
kernel-debuginfo
Red Hat:rhel_aus:5.9
 before 0:2.6.18-348.33.1.el5
0:2.6.18-348.33.1.el5
kernel-debuginfo-common
Red Hat:rhel_aus:5.9
 before 0:2.6.18-348.33.1.el5
0:2.6.18-348.33.1.el5
kernel-devel
Red Hat:rhel_aus:5.9
 before 0:2.6.18-348.33.1.el5
0:2.6.18-348.33.1.el5
kernel-doc
Red Hat:rhel_aus:5.9
 before 0:2.6.18-348.33.1.el5
0:2.6.18-348.33.1.el5
kernel-headers
Red Hat:rhel_aus:5.9
 before 0:2.6.18-348.33.1.el5
0:2.6.18-348.33.1.el5
kernel-xen
Red Hat:rhel_aus:5.9
 before 0:2.6.18-348.33.1.el5
0:2.6.18-348.33.1.el5
kernel-xen-debuginfo
Red Hat:rhel_aus:5.9
 before 0:2.6.18-348.33.1.el5
0:2.6.18-348.33.1.el5
kernel-xen-devel
Red Hat:rhel_aus:5.9
 before 0:2.6.18-348.33.1.el5
0:2.6.18-348.33.1.el5
kernel
Red Hat:rhel_mission_critical:5.6
 before 0:2.6.18-238.58.1.el5
0:2.6.18-238.58.1.el5
kernel-PAE
Red Hat:rhel_mission_critical:5.6
 before 0:2.6.18-238.58.1.el5
0:2.6.18-238.58.1.el5
kernel-PAE-debuginfo
Red Hat:rhel_mission_critical:5.6
 before 0:2.6.18-238.58.1.el5
0:2.6.18-238.58.1.el5
kernel-PAE-devel
Red Hat:rhel_mission_critical:5.6
 before 0:2.6.18-238.58.1.el5
0:2.6.18-238.58.1.el5
kernel-debug
Red Hat:rhel_mission_critical:5.6
 before 0:2.6.18-238.58.1.el5
0:2.6.18-238.58.1.el5
kernel-debug-debuginfo
Red Hat:rhel_mission_critical:5.6
 before 0:2.6.18-238.58.1.el5
0:2.6.18-238.58.1.el5
kernel-debug-devel
Red Hat:rhel_mission_critical:5.6
 before 0:2.6.18-238.58.1.el5
0:2.6.18-238.58.1.el5
kernel-debuginfo
Red Hat:rhel_mission_critical:5.6
 before 0:2.6.18-238.58.1.el5
0:2.6.18-238.58.1.el5
kernel-debuginfo-common
Red Hat:rhel_mission_critical:5.6
 before 0:2.6.18-238.58.1.el5
0:2.6.18-238.58.1.el5
kernel-devel
Red Hat:rhel_mission_critical:5.6
 before 0:2.6.18-238.58.1.el5
0:2.6.18-238.58.1.el5
kernel-doc
Red Hat:rhel_mission_critical:5.6
 before 0:2.6.18-238.58.1.el5
0:2.6.18-238.58.1.el5
kernel-headers
Red Hat:rhel_mission_critical:5.6
 before 0:2.6.18-238.58.1.el5
0:2.6.18-238.58.1.el5
kernel-xen
Red Hat:rhel_mission_critical:5.6
 before 0:2.6.18-238.58.1.el5
0:2.6.18-238.58.1.el5
kernel-xen-debuginfo
Red Hat:rhel_mission_critical:5.6
 before 0:2.6.18-238.58.1.el5
0:2.6.18-238.58.1.el5
kernel-xen-devel
Red Hat:rhel_mission_critical:5.6
 before 0:2.6.18-238.58.1.el5
0:2.6.18-238.58.1.el5

History

History
RecordedChangedSources
affected
aliases, productsEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2017-2634 is a high vulnerability (CVSS 7.5) in Linux Kernel, published July 27, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 5.15%, the 92nd percentile. Fixed in kernel 0:2.6.18-419.el5.

References

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