CVE-2026-89478 Linux Kernel SCTP - Use After Free

Linux kernel SCTP contains a use-after-free vulnerability caused by a race condition where a removed transport is accessed in SCTP packet processing, letting authenticated attackers cause memory corruption, exploit requires authenticated ASCONF DEL-IP.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.51% chance of exploitation in 30 days
View the NVD record ↗

Details

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

Vendor fix

Update to the latest Linux kernel version containing the fix.

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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