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CVE-2017-9211

20
FAUCET Score

CVE-2017-9211 describes a denial-of-service vulnerability in the Linux kernel (through version 4.11.2) affecting the crypto_skcipher_init_tfm function. This flaw allows local users to trigger a NULL pointer dereference by exploiting a missing key-size check in the setkey function. Rated Medium (CVSS 5.5), the vulnerability requires local access with low attack complexity, leading to high availability impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.11.2CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.5MEDIUM

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.39%
Probability of exploitation in next 30 days
EPSS Percentile
31.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0039 is in the 87th percentile among its peer group of 15,938 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

github_advisorypatch availablevia nvd_reference
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel
redhatno patchvia redhat_api
Product: Red Hat Enterprise MRG 2Fixed in: kernel

Vendor Advisories (1)

redhatCVE-2017-9211Moderate

kernel: Null pointer dereference due to missing key-size check in setkey function

May 9, 2017

References

git.kernel.org / cgit/linux/kernel/git/torvalds/linux.git/commit
Patch
github.com / torvalds/linux/commit/9933e113c2e87a9f46a40fde8dafbf801dca1ab9
Patch
patchwork.kernel.org / patch/9718933
Mailing ListPatch