CVE-2017-6347 — kernel: ipv4: Incorrect IP_CHECKSUM handling

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HIGH

kernel: ipv4: Incorrect IP_CHECKSUM handling

Published Mar 1, 2017

7.8

HIGH

CVSS 3.1

EPSS 0.44%

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.

Affected products

Red Hat Enterprise Linux 5

kernel

Not affected
Red Hat Enterprise Linux 6

kernel

Not affected
Red Hat Enterprise Linux 7

kernel

Not affected
Red Hat Enterprise Linux 7

kernel-rt

Not affected
Red Hat Enterprise MRG 2

realtime-kernel

Not affected

Product	Package	State	Advisory
Red Hat Enterprise Linux 5	kernel	Not affected	n/a
Red Hat Enterprise Linux 6	kernel	Not affected	n/a
Red Hat Enterprise Linux 7	kernel	Not affected	n/a
Red Hat Enterprise Linux 7	kernel-rt	Not affected	n/a
Red Hat Enterprise MRG 2	realtime-kernel	Not affected	n/a

Remediation

Red Hat statement

This issue does not affect the Linux kernels as shipped with Red Hat Enterprise Linux 4,5,6,7 and MRG-2.

Metrics

0.44% 0.00438

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.00438

Score over time

2021–2026

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Percentile over time

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Table of values (8 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	0.44% (0.00438)	35.75th	v5 (v2026.06.15)
Sep 20, 2026	0.44% (0.00438)	37.51th	v5 (v2026.06.15)
Jul 20, 2024	0.04% (0.00042)	5.06th	v3 (v2023.03.01)
Mar 7, 2023	0.04% (0.00042)	5.63th	v3 (v2023.03.01)
Mar 6, 2023	1.03% (0.01034)	41.69th	v2 (v2022.01.01)
Feb 4, 2022	1.03% (0.01034)	20.32th	v2 (v2022.01.01)
Feb 3, 2022	0.97% (0.00967)	26.07th	v5 (v2026.06.15)
Apr 14, 2021	0.97% (0.00967)	0.00th	v1

Weaknesses (2)

CWE-125

Out-of-bounds Read

CWE-200

Exposure of Sensitive Information

References (9)

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ca4ef4574f1ee5252e2cd365f8f5d5bafd048f32
x_refsource_CONFIRMPatchThird Party Advisory
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.10.1
x_refsource_CONFIRMPatchRelease NotesThird Party Advisory
http://www.openwall.com/lists/oss-security/2017/02/28/5
mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory
http://www.securityfocus.com/bid/96487
vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
https://access.redhat.com/security/cve/CVE-2017-6347
Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1427984
x_refsource_CONFIRMIssue TrackingPatchThird Party AdvisoryVDB Entry
https://github.com/torvalds/linux/commit/ca4ef4574f1ee5252e2cd365f8f5d5bafd048f32
x_refsource_CONFIRMPatchThird Party Advisory
https://nvd.nist.gov/vuln/detail/CVE-2017-6347
https://www.cve.org/CVERecord?id=CVE-2017-6347

Link	Providers	Tags
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ca4ef4574f1ee5252e2cd365f8f5d5bafd048f32		x_refsource_CONFIRMPatchThird Party Advisory
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.10.1		x_refsource_CONFIRMPatchRelease NotesThird Party Advisory
http://www.openwall.com/lists/oss-security/2017/02/28/5		mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory
http://www.securityfocus.com/bid/96487		vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
https://access.redhat.com/security/cve/CVE-2017-6347		Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1427984		x_refsource_CONFIRMIssue TrackingPatchThird Party AdvisoryVDB Entry
https://github.com/torvalds/linux/commit/ca4ef4574f1ee5252e2cd365f8f5d5bafd048f32		x_refsource_CONFIRMPatchThird Party Advisory
https://nvd.nist.gov/vuln/detail/CVE-2017-6347
https://www.cve.org/CVERecord?id=CVE-2017-6347