CVE-2026-98331 Linux Kernel mac80211 - Use After Free

Linux kernel mac80211 component contains a use-after-free vulnerability caused by not removing virtual interfaces when their network device is unregistered, letting attackers cause kernel crashes (DoS), exploit requires triggering net device unregistration under specific conditions.

CVSS base score 7.0 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.13% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Use After Free
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
6 October 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for mac80211 interface unregistration.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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