What’s Vulnerable › Vulnerabilities

CVE-2018-21008

• Severity: medium (CVSS 5.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-09-04 · updated 2026-06-17
• Weakness: CWE-416

Description

An issue was discovered in the Linux kernel before 4.16.7. A use-after-free can be caused by the function rsi_mac80211_detach in the file drivers/net/wireless/rsi/rsi_91x_mac80211.c.

Affected products

• Linux kernel: before 4.16.7 — fixed in 4.16.7

How to fix

Upgrade to a fixed version: Linux kernel 4.16.7. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00064.html
• http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00066.html
• http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html
• https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.16.7
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=abd39c6ded9db53aa44c2540092bdd5fb6590fa8
• https://lists.debian.org/debian-lts-announce/2019/09/msg00025.html
• https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html
• https://security.netapp.com/advisory/ntap-20191004-0001/
• https://usn.ubuntu.com/4162-1/
• https://usn.ubuntu.com/4162-2/
• https://usn.ubuntu.com/4163-1/
• https://usn.ubuntu.com/4163-2/

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