CVE-2026-98364 Linux Kernel - Use After Free

Linux kernel contains a use-after-free vulnerability in xfrm bundle creation caused by improper handling of net_device references under RCU, letting local attackers cause memory corruption, exploit requires concurrent RTM_DELLINK operation.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.12% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Use After Free
Impact
Denial Of Service, Privilege Escalation
CVSS vector
CVSS:3.1/AV:L/AC:L/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 xfrm bundle creation.

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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