CVE-2026-99053 Linux kernel - Use After Free

Linux kernel tipc contains a use-after-free vulnerability caused by returning a node after dropping its RCU read lock without taking a reference, letting attackers cause race conditions leading to use of freed memory, exploit requires concurrent access to tipc nodes.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.21% 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
23 October 2026
Updated
25 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for tipc node reference handling.

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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