Home/CVE/Use-after-free vulnerability in the __sys_recvmmsg function in net/socket.c in the Linux kernel before 4.5.2 allows remo
CVE
CVE-2016-7117
Use-after-free vulnerability in the __sys_recvmmsg function in net/socket.c in the Linux kernel before 4.5.2 allows remo
Use-after-free vulnerability in the __sys_recvmmsg function in net/socket.c in the Linux kernel before 4.5.2 allows remote attackers to execute arbitrary code via vectors involving a recvmmsg system call that is mishandled during error processing.
CRITICAL · CVSS 9.8
EPSS 0.14755
Act now
- EPSS ≥ 0.10 - elevated exploitation probability
- EPSS percentile: top 5% of all CVEs by exploitation likelihood
- Public exploit or PoC is available
- CVSS base score ≥ 7.0
Sigma rules0
YARA rules0
Look this up elsewhere - one-click external pivots
▸
How to read a CVE - triage first, then detect and patch
This page is every public fact about CVE-2016-7117, cross-linked. Its job is to answer one question fast - does this need my attention now? - and then hand you the two things you do about it. Here is how an analyst reads it.
Triage: should I act now? Four signals, and they are not interchangeable:
CVSSseverity - how bad it is IF exploited, 0-10. A high CVSS alone is not urgency; a flaw can be a perfect 10 and never actually be attacked.
EPSSprobability - a model’s estimate of the chance it is exploited in the next 30 days, 0-1. This is the “will it actually happen” signal.
CISA KEVconfirmed - it is being exploited in the wild right now. The strongest signal on the page; KEV beats any score.
Weaponisedavailability - public exploits / PoCs, and especially Metasploit modules rated Excellent / Great. Reliable, packaged exploit code means low-skill attackers can use it today.
How they combine: KEV, or a dependable Metasploit module, means patch now regardless of CVSS. High CVSS + low EPSS + no exploit is real but not an emergency - schedule it. Low CVSS but KEV-listed still gets patched now. The verdict above already weighed these for you; this is how it got there.
Then what - two workflows:
Detectwhen you cannot patch today, follow this CVE to the ATT&CK techniques it enables, then Build a SIEM detection (the green button) - author a rule, test it in Atomic, deploy it. That buys visibility while the patch waits.
PatchAffected products / packages tell you if you are exposed; Fixed versions by distribution and Vendor advisories give the exact version that closes it.
Reading order for the panels below: verdict + badges, then Public exploits / Metasploit (is it weaponised), then ATT&CK techniques + Sigma / IDS rules (can I detect it), then Affected products / packages + Fixed versions (am I exposed, what patches it), then Threat actors / IOCs (who uses it), then Scoring & timeline / references (the evidence).
◆
ATT&CK techniques
1Techniques this CVE enables - linked via CWECAPECATT&CK. High◆ = named directly in ATT&CK or Nuclei templates.
▤ Build a SIEM detection for these techniques⬡
Weakness Classification
CWE-19Data Processing Errors
▤
Affected Products & Versions
12debian linuxall versions
linux kernel>= 2.6.33 and < 3.2.80
linux kernel>= 3.3 and < 3.4.113
linux kernel>= 3.5 and < 3.10.102
linux kernel>= 3.11 and < 3.12.59
linux kernel>= 3.13 and < 3.14.67
linux kernel>= 3.15 and < 3.16.35
linux kernel>= 3.17 and < 3.18.37
⚠
Public Exploits & PoCs
15These PoC and exploit links come from public sources and are not verified to be safe or functional. Review the code before running anything, and treat unverified entries as untrusted.
📦
Fixed versions by distribution
51The package version that resolves this CVE on each Linux distribution, from the vendor’s published security data. fixed in shows a patched version exists; open means the package is listed as affected with no fix yet.
oracle alldtrace-modules-3.8.13-118.15.2.el6uek fixed in 0:0.4.5-3.el6
oracle alldtrace-modules-3.8.13-118.15.2.el7uek open
oracle alldtrace-modules-4.1.12-61.1.23.el6uek fixed in 0:0.5.3-2.el6
oracle alldtrace-modules-4.1.12-61.1.23.el7uek fixed in 0:0.5.3-2.el7
oracle allkernel open
oracle allkernel-PAE fixed in 0:2.6.18-417.el5
oracle allkernel-PAE-devel fixed in 0:2.6.18-417.el5
oracle allkernel-abi-whitelists open
oracle allkernel-debug open
oracle allkernel-debug-devel fixed in 0:3.10.0-514.6.1.el7
oracle allkernel-devel open
oracle allkernel-firmware fixed in 0:2.6.32-642.13.1.el6
oracle allkernel-headers open
oracle allkernel-tools open
oracle allkernel-tools-libs fixed in 0:3.10.0-514.6.1.el7
oracle allkernel-tools-libs-devel fixed in 0:3.10.0-514.6.1.el7
oracle allkernel-uek fixed in 0:4.1.12-61.1.23.el7uek
oracle allkernel-uek-debug open
oracle allkernel-uek-debug-devel open
oracle allkernel-uek-devel fixed in 0:4.1.12-61.1.23.el6uek
oracle allkernel-uek-firmware fixed in 0:4.1.12-61.1.23.el6uek
oracle allkernel-xen open
oracle allkernel-xen-devel fixed in 0:2.6.18-417.el5
oracle allocfs2-2.6.18-417.0.0.0.1.el5 fixed in 0:1.4.11-1.el5
oracle allocfs2-2.6.18-417.0.0.0.1.el5PAE open
oracle allocfs2-2.6.18-417.0.0.0.1.el5debug fixed in 0:1.4.11-1.el5
oracle allocfs2-2.6.18-417.0.0.0.1.el5xen fixed in 0:1.4.11-1.el5
oracle allocfs2-2.6.18-417.el5 fixed in 0:1.4.11-1.el5
oracle allocfs2-2.6.18-417.el5PAE fixed in 0:1.4.11-1.el5
oracle allocfs2-2.6.18-417.el5debug fixed in 0:1.4.11-1.el5
oracle allocfs2-2.6.18-417.el5xen fixed in 0:1.4.11-1.el5
oracle alloracleasm-2.6.18-417.0.0.0.1.el5 open
oracle alloracleasm-2.6.18-417.0.0.0.1.el5PAE open
oracle alloracleasm-2.6.18-417.0.0.0.1.el5debug open
oracle alloracleasm-2.6.18-417.0.0.0.1.el5xen fixed in 0:2.0.5-2.el5
oracle alloracleasm-2.6.18-417.el5 open
oracle alloracleasm-2.6.18-417.el5PAE fixed in 0:2.0.5-2.el5
oracle alloracleasm-2.6.18-417.el5debug open
oracle alloracleasm-2.6.18-417.el5xen fixed in 0:2.0.5-2.el5
oracle allperf open
oracle allpython-perf fixed in 0:3.10.0-514.6.1.el7
suse sle15kernel-default open
suse sle15kernel-default-base open
suse sle15kernel-default-devel open
suse sle15kernel-default-man open
suse sle15kernel-devel open
suse sle15kernel-devel-rt open
suse sle15kernel-macros open
suse sle15kernel-source open
suse sle15kernel-source-rt open
suse sle15reiserfs-kmp-default open
▣
Scoring & Timeline
9.8
CRITICAL · CVSS v3.1 · [email protected]
Attack Vector
Network
Adjacent
Local
Physical
Attack Complexity
Low
High
Privileges Required
None
Low
High
User Interaction
None
Required
Scope
Unchanged
Changed
Confidentiality
None
Low
High
Integrity
None
Low
High
Availability
None
Low
High
⚑
Vendor Advisories
30suse-csafSUSE-SU-2017:2342-1
suse-csafSUSE-SU-2017:1990-1
suse-csafSUSE-SU-2017:1360-1
suse-csafSUSE-SU-2017:1247-1
suse-csafSUSE-SU-2017:1102-1
🔗
References & Sources
21Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=34b88a68f26a75e4fded796f1a49c40f82234b7dIssue TrackingPatchVendor Advisory
http://rhn.redhat.com/errata/RHSA-2016-2962.htmlThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2017-0031.htmlThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2017-0036.htmlThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2017-0065.htmlThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2017-0086.htmlThird Party Advisory