CVE-2016-3707: linux linux_kernel-rt Improper Access Control
Vulnerability summary
CVE-2016-3707 is a high (CVSS 8.1) Improper Access Control vulnerability in linux linux_kernel-rt. EPSS estimates a 3.39% chance of exploitation in the next 30 days, higher than 88.8% of scored vulnerabilities.
Severe, CVSS 8.1 (NVD); no exploitation reported by the 5 checked sources; EPSS 3% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 5 · Related 3Timeline
- 27-06-2016PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated8.1HighCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated8.1HighCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
3.39%
Chance of exploitation in the next 30 days
Percentile
89%
Versus all other CVEs
30-day change
No change 0.00 pp
From 3.39% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Redhat2 products
Debian1 product
- linux< 3.15~rc5-1~exp1
Linux1 product
- linux_kernel-rt≤ 3.10.0
Novell1 product
Ubuntu1 product
- linux-raspi2All versions (No fix recorded)
5 vendors · 6 products
References
11 links- lists.opensuse.org/opensuse-security-announce/2016-08/msg00007.htmlVendor AdvisoryX Refsource SUSEREPORT
- lists.opensuse.org/opensuse-security-announce/2016-07/msg00005.htmlVendor AdvisoryX Refsource SUSEThird Party AdvisoryREPORT
- lists.opensuse.org/opensuse-security-announce/2016-08/msg00000.htmlVendor AdvisoryX Refsource SUSEThird Party AdvisoryREPORT
- lwn.net/Articles/448790/REPORT
