The icmp_check_sysrq function in net/ipv4/icmp.c in the kernel.org projects/rt patches…
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-284.
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.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel-rt:*:*:*:*:*:*:*:* | up to 3.10.0 | Vulnerable | Linux |
| cpe:2.3:o:redhat:enterprise_linux_for_real_time:7:*:*:*:*:*:*:* | 7 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_for_real_time_for_nfv:7:*:*:*:*:*:*:* | 7 | Vulnerable | Red Hat |
| cpe:2.3:o:novell:suse_linux_enterprise_real_time_extension:12.0:sp1:*:*:*:*:*:* | 12.0 sp1 | Vulnerable | Novell |
- cpe:2.3:o:linux:linux_kernel-rt:*:*:*:*:*:*:*:* Versions up to 3.10.0 Vulnerable ·Linux
- cpe:2.3:o:redhat:enterprise_linux_for_real_time:7:*:*:*:*:*:*:* Versions 7 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_for_real_time_for_nfv:7:*:*:*:*:*:*:* Versions 7 Vulnerable ·Red Hat
- cpe:2.3:o:novell:suse_linux_enterprise_real_time_extension:12.0:sp1:*:*:*:*:*:* Versions 12.0 sp1 Vulnerable ·Novell
Remediation
Red Hat 2 advisories
- RHSA-2016:1341 Released 2016-06-27 · Red Hat rating Importantkernel-rt security and bug fix update
- Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt-1:3.10.0-327.rt56.190.el6rt, kernel-rt-debug-1:3.10.0-327.rt56.190.el6rt, kernel-rt-debug-devel-1:3.10.0-327.rt56.190.el6rt +7
- RHSA-2016:1301 Released 2016-06-23 · Red Hat rating Importantkernel-rt security, bug fix, and enhancement update
- Red Hat Enterprise Linux Realtime (v. 7) kernel-rt-3.10.0-327.22.2.rt56.230.el7_2, kernel-rt-debug-3.10.0-327.22.2.rt56.230.el7_2, kernel-rt-debug-devel-3.10.0-327.22.2.rt56.230.el7_2 +4
- 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-debug-3.10.0-327.22.2.rt56.230.el7_2, kernel-rt-debug-devel-3.10.0-327.22.2.rt56.230.el7_2 +7
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux Realtime (v. 7) | Fixed | RHSA-2016:1301 |
| Red Hat Enterprise Linux for Real Time for NFV (v. 7) | Fixed | RHSA-2016:1301 |
| Red Hat MRG Realtime for RHEL 6 Server v.2 | Fixed | RHSA-2016:1341 |
Not affected: 4 products
- Red Hat Enterprise Linux 4
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
Timeline
- 2026-10-02 Threatist record created from CVE-2016-3707
- 2026-10-03 Alias added: GHSA-558g-x28c-wmj6
References
Sources
- CVE-2016-3707 · CVE Program
- CVE-2016-3707 · NVD
- FIRST EPSS
- GHSA-558g-x28c-wmj6 · GitHub Advisory Database · CC BY 4.0
- CVE-2016-3707 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences