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CVE-2020-16166

14
FAUCET Score

CVE-2020-16166 is a low-severity vulnerability affecting the Linux kernel through version 5.7.11, specifically impacting various distributions like Canonical, Debian, Fedora, and Oracle. This flaw allows remote attackers to make observations that could reveal sensitive information about the internal state of the network Random Number Generator (RNG). The attack complexity is high, and while it could lead to information disclosure, it does not impact integrity or availability. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 5.7.11CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
15.1CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
15.2CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*
31CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
32CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

3.7LOW

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
5.27%
Probability of exploitation in next 30 days
EPSS Percentile
91.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0527 is in the 91st percentile among its peer group of 1,506 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.3 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (15)

github_advisorypatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: 17036-16820Fixed in: 5.4.91-3
microsoftpatch availablevia msrc
Product: cm1 kernel 5.4.91-3 on CBL Mariner 1.0Fixed in: 5.4.91-3
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 x64Fixed in: 5.4.91-3
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 ARMFixed in: 5.4.91-3
oraclepatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.1 Extended Update SupportFixed in: kernel-0:4.18.0-147.38.1.el8_1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Extended Update SupportFixed in: kernel-rt-0:4.18.0-193.37.1.rt13.87.el8_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Extended Update SupportFixed in: kernel-0:4.18.0-193.37.1.el8_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel-0:4.18.0-240.8.1.el8_3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-alt-0:4.14.0-115.32.1.el7a
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel-rt-0:4.18.0-240.8.1.rt7.62.el8_3
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-rt
redhatend of lifevia redhat_api
Product: Red Hat Enterprise MRG 2Fixed in: kernel

Vendor Advisories (4)

microsoft2020-Aug/CVE-2020-16166

CVE-2020-16166

Aug 11, 2020
linuxCVE-2020-16166LOW

The Linux kernel through 5.7.11 allows remote attackers to make observations that help to obtain sensitive information about the internal state of the network RNG, aka CID-f227e3ec3b5c. This is related to drivers/char/random.c and kernel/time/timer.c.

Jul 30, 2020
redhatCVE-2020-16166Moderate

kernel: information exposure in drivers/char/random.c and kernel/time/timer.c

Jul 29, 2020
microsoft2020-Jul/CVE-2020-16166Low

The Linux kernel through 5.7.11 allows remote attackers to make observations that help to obtain sensitive information about the internal state of the network RNG aka CID-f227e3ec3b5c. This is related to drivers/char/random.c and kernel/time/timer.c.

Jul 14, 2020

References

lists.opensuse.org / opensuse-security-announce/2020-08/msg00009.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2020-08/msg00047.html
Mailing ListThird Party Advisory
arxiv.org / pdf/2012.07432.pdf
Technical DescriptionThird Party Advisory
github.com / torvalds/linux/commit/f227e3ec3b5cad859ad15666874405e8c1bbc1d4
PatchThird Party Advisory
git.kernel.org / cgit/linux/kernel/git/torvalds/linux.git/commit
PatchVendor Advisory
git.kernel.org / pub/scm/linux/kernel/git/torvalds/linux.git/commit
PatchVendor Advisory
lists.debian.org / debian-lts-announce/2020/09/msg00025.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2020/10/msg00032.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2020/10/msg00034.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/AAPTLPAEKVAJYJ4LHN7VH4CN2W75R2YW
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/MFBCLQWJI5I4G25TVJNLXLAXJ4MERQNW
security.netapp.com / advisory/ntap-20200814-0004
Third Party Advisory
usn.ubuntu.com / 4525-1
Third Party Advisory
usn.ubuntu.com / 4526-1
Third Party Advisory
oracle.com / security-alerts/cpuApr2021.html
PatchThird Party Advisory