CVE-2017-6347

Name: CVE-2017-6347
Creator: NVD / NIST
Published: 2017-03-01T20:59:00.533+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.44%

Last modified Jun 17, 2026

CVE-2017-6347 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. The ip_cmsg_recv_checksum function in net/ipv4/ip_sockglue.c in the Linux kernel before 4.10.1 has incorrect expectations about skb data layout, which allows local users to cause a denial of service (buffer over-read) or possibly have unspecified other impact via crafted system calls, as demonstrated by use of the MSG_MORE flag in conjunction with loopback UDP transmission.. EPSS estimates a 0.44% chance of exploitation in the next 30 days.

Description

The ip_cmsg_recv_checksum function in net/ipv4/ip_sockglue.c in the Linux kernel before 4.10.1 has incorrect expectations about skb data layout, which allows local users to cause a denial of service (buffer over-read) or possibly have unspecified other impact via crafted system calls, as demonstrated by use of the MSG_MORE flag in conjunction with loopback UDP transmission.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.44%

34.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-125

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	>= 4.0, < 4.4.52
Linux	Linux Kernel	>= 4.5, < 4.9.13
Linux	Linux Kernel	>= 4.10, < 4.10.1

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ca4ef4574f1ee5252e2cd365f8f5d5bafd048f32Patch, Third Party Advisory
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.10.1Patch, Release Notes, Third Party Advisory
http://www.openwall.com/lists/oss-security/2017/02/28/5Mailing List, Patch, Third Party Advisory
http://www.securityfocus.com/bid/96487Third Party Advisory, VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=1427984Issue Tracking, Patch, Third Party Advisory, VDB Entry
https://github.com/torvalds/linux/commit/ca4ef4574f1ee5252e2cd365f8f5d5bafd048f32Patch, Third Party Advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ca4ef4574f1ee5252e2cd365f8f5d5bafd048f32Patch, Third Party Advisory
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.10.1Patch, Release Notes, Third Party Advisory
http://www.openwall.com/lists/oss-security/2017/02/28/5Mailing List, Patch, Third Party Advisory
http://www.securityfocus.com/bid/96487Third Party Advisory, VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=1427984Issue Tracking, Patch, Third Party Advisory, VDB Entry
https://github.com/torvalds/linux/commit/ca4ef4574f1ee5252e2cd365f8f5d5bafd048f32Patch, Third Party Advisory

Timeline

Published: Mar 1, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-6347?

How severe is CVE-2017-6347?

CVE-2017-6347 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.44% probability of exploitation in the next 30 days.

How do I fix CVE-2017-6347?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-6347?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST