CVE-2026-89477 Linux Kernel - Denial of Service

Linux kernel contains a NULL pointer dereference vulnerability in SCTP stream reconfiguration caused by completing untransmitted RECONF requests, letting unprivileged local attackers cause kernel panic, exploit requires local unprivileged process to remove last address and request stream reset.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.50% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
11 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for SCTP NULL dereference in stream reset completion.

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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