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CVE-2017-9242

21
FAUCET Score

CVE-2017-9242 describes a denial-of-service vulnerability in the Linux kernel, specifically within the __ip6_append_data function in net/ipv6/ip6_output.c, affecting versions through 4.11.3. This flaw allows local users to crash the system by crafting specific system calls due to an insufficient check for skb data structure overwrites. Rated Medium with a CVSS score of 5.5, the vulnerability requires local access and low privileges, but its exploitation is of low complexity, leading to high availability impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.11.3CPE 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
0.40%
Probability of exploitation in next 30 days
EPSS Percentile
33.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0040 is in the 88th 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
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-rt-0:3.10.0-693.rt56.617.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-0:3.10.0-693.el7
View patch

Vendor Advisories (1)

redhatCVE-2017-9242Moderate

kernel: Incorrect overwrite check in __ip6_append_data()

May 19, 2017

References

git.kernel.org / cgit/linux/kernel/git/torvalds/linux.git/commit
Issue TrackingPatchThird Party Advisory
access.redhat.com / errata/RHSA-2017:1842
access.redhat.com / errata/RHSA-2017:2077
github.com / torvalds/linux/commit/232cd35d0804cc241eb887bb8d4d9b3b9881c64a
Issue TrackingPatchThird Party Advisory
patchwork.ozlabs.org / patch/764880
Broken Link
debian.org / security/2017/dsa-3886
securityfocus.com / bid/98731
Third Party AdvisoryVDB Entry