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CVE-2018-21008

20
FAUCET Score

CVE-2018-21008 describes a use-after-free vulnerability in the rsi_mac80211_detach function within the Linux kernel's wireless driver (drivers/net/wireless/rsi/rsi_91x_mac80211.c) affecting versions prior to 4.16.7. This medium-severity flaw (CVSS 5.5) can lead to a denial-of-service condition with low attack complexity, requiring local access and privileges. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.16.7CPE 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
0.57%
Probability of exploitation in next 30 days
EPSS Percentile
43.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0057 is in the 94th percentile among its peer group of 15,940 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

Vendor Advisories (1)

redhatCVE-2018-21008Important

kernel: use-after-free can be caused by the function rsi_mac80211_detach in the file drivers/net/wireless/rsi/rsi_91x_mac80211.c

Sep 4, 2019

References

lists.opensuse.org / opensuse-security-announce/2019-09/msg00064.html
lists.opensuse.org / opensuse-security-announce/2019-09/msg00066.html
packetstormsecurity.com / files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html
cdn.kernel.org / pub/linux/kernel/v4.x/ChangeLog-4.16.7
Mailing ListVendor Advisory
git.kernel.org / pub/scm/linux/kernel/git/torvalds/linux.git/commit
Mailing ListPatchVendor Advisory
lists.debian.org / debian-lts-announce/2019/09/msg00025.html
lists.debian.org / debian-lts-announce/2020/03/msg00001.html
security.netapp.com / advisory/ntap-20191004-0001
usn.ubuntu.com / 4162-1
usn.ubuntu.com / 4162-2
usn.ubuntu.com / 4163-1
usn.ubuntu.com / 4163-2