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Fencer Vulns
high 7.8

CVE-2017-6347 json

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 la…

published 2017-03-01 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-15408

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 38%
public exploits
0
none known

Summary

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.

Patch / fix

  • linux linux_kernel 4.4.52, 4.9.13, 4.10.1
  • linux Debian 14, Debian 13, Debian 12 4.9.13-1

debian advisories DEBIAN-CVE-2017-6347

  • linux Ubuntu 16.04 LTS 4.4.0-75.96
  • linux-aws Ubuntu 16.04 LTS 4.4.0-1016.25
  • linux-gke Ubuntu 16.04 LTS 4.4.0-1012.12
  • linux-hwe Ubuntu 16.04 LTS 4.10.0-32.36~16.04.1
  • linux-raspi2 Ubuntu 16.04 LTS 4.4.0-1054.61
  • linux-lts-xenial Ubuntu 14.04 LTS 4.4.0-75.96~14.04.1
  • linux-snapdragon Ubuntu 16.04 LTS 4.4.0-1057.61

ubuntu advisories UBUNTU-CVE-2017-6347

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel-rt SLE Real Time 12 SP2 4.4.74-7.10.1
  • kernel-syms-rt SLE Real Time 12 SP2 4.4.74-7.10.1
  • kernel-rt_debug SLE Real Time 12 SP2 4.4.74-7.10.1
  • kernel-source-rt SLE Real Time 12 SP2 4.4.74-7.10.1
  • kernel-syms SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2, SLES 12 SP2 +1 more 4.4.59-92.17.2
  • kernel-source SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2, SLES 12 SP2 +1 more 4.4.59-92.17.2
  • kernel-default SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2, SLES 12 SP2 +3 more 4.4.59-92.17.3
  • kernel-obs-build SLE Software Development Kit 12 SP2 4.4.59-92.17.3

suse advisories SUSE-SU-2017:1990-1SUSE-SU-2017:1183-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-6347 updated cvss 5.6

kernel: ipv4: Incorrect IP_CHECKSUM handling

  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.