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Fencer Intel
high 8.1

CVE-2016-3707 json

The icmp_check_sysrq function in net/ipv4/icmp.c in the kernel.org projects/rt patches for the Linux kernel, as used in the kernel-rt packa…

published 2016-06-27 10 y ago modified 2026-06-17 4 mo ago also EUVD-2016-4728

cvss
8.1
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.4%
EPSS 3.4% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

The icmp_check_sysrq function in net/ipv4/icmp.c in the kernel.org projects/rt patches for the Linux kernel, as used in the kernel-rt package before 3.10.0-327.22.1 in Red Hat Enterprise Linux for Real Time 7 and other products, allows remote attackers to execute SysRq commands via crafted ICMP Echo Request packets, as demonstrated by a brute-force attack to discover a cookie, or an attack that occurs after reading the local icmp_echo_sysrq file.

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 3.15~rc5-1~exp1

debian advisories DEBIAN-CVE-2016-3707

  • kernel-rt enterprise mrg 2 1:3.10.0-327.rt56.190.el6rt
  • kernel-rt-trace enterprise mrg 2 1:3.10.0-327.rt56.190.el6rt
  • kernel-rt-vanilla enterprise mrg 2 1:3.10.0-327.rt56.190.el6rt
  • kernel-rt-firmware enterprise mrg 2 1:3.10.0-327.rt56.190.el6rt
  • kernel-rt-debuginfo-common-x86_64 enterprise mrg 2 1:3.10.0-327.rt56.190.el6rt
  • kernel-rt RHEL 7 EXTRAS_RT 3.10.0-327.22.2.rt56.230.el7_2
  • kernel-rt-kvm RHEL 7 EXTRAS_RT 3.10.0-327.22.2.rt56.230.el7_2
  • kernel-rt-trace RHEL 7 EXTRAS_RT 3.10.0-327.22.2.rt56.230.el7_2

red hat advisories RHSA-2016:1341RHSA-2016:1301

  • kernel-rt SLE Real Time 11 SP4 3.0.101.rt130-57.1
  • kernel-syms-rt SLE Real Time 11 SP4 3.0.101.rt130-57.1
  • kernel-rt_trace SLE Real Time 11 SP4 3.0.101.rt130-57.1
  • kernel-source-rt SLE Real Time 11 SP4 3.0.101.rt130-57.1
  • kernel-rt SLE Real Time 12 SP1 3.12.61-60.18.1
  • kernel-compute SLE Real Time 12 SP1 3.12.61-60.18.1
  • kernel-syms-rt SLE Real Time 12 SP1 3.12.61-60.18.1
  • kernel-rt_debug SLE Real Time 12 SP1 3.12.61-60.18.1

suse advisories SUSE-SU-2016:1985-1SUSE-SU-2016:1937-1SUSE-SU-2016:1764-1

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-2016-3707 updated cvss 7.1

kernel-rt: Sending SysRq command via ICMP echo request

  • Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt 3.10.0-327.22.2.rt56.230.el7_2, kernel-rt-kvm 3.10.0-327.22.2.rt56.230.el7_2, kernel-rt-trace 3.10.0-327.22.2.rt56.230.el7_2, kernel-rt-debug-kvm 3.10.0-327.22.2.rt56.230.el7_2, kernel-rt-trace-kvm 3.10.0-327.22.2.rt56.230.el7_2, kernel-rt-debuginfo-common-x86_64 3.10.0-327.22.2.rt56.230.el7_2 Red Hat Enterprise Linux Realtime (v. 7) kernel-rt 3.10.0-327.22.2.rt56.230.el7_2, kernel-rt-trace 3.10.0-327.22.2.rt56.230.el7_2, kernel-rt-debuginfo-common-x86_64 3.10.0-327.22.2.rt56.230.el7_2
    fixed: vendor fix RHSA-2016:1301
  • Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt 3.10.0-327.rt56.190.el6rt, kernel-rt-trace 3.10.0-327.rt56.190.el6rt, kernel-rt-vanilla 3.10.0-327.rt56.190.el6rt, kernel-rt-firmware 3.10.0-327.rt56.190.el6rt, kernel-rt-debuginfo-common-x86_64 3.10.0-327.rt56.190.el6rt
    fixed: vendor fix RHSA-2016:1341
  • Red Hat Enterprise Linux 4 kernel 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, python-perf, kernel-kdump, kernel-tools, +3 more
    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

3.39% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 8.1 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness

References

Sources

Fencer Intel 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.