CVE-2026-89503 Linux Kernel - Race Condition

Linux kernel contains a race condition in ring_buffer_alloc_read_page() caused by concurrent subbuf_order changes, letting attackers cause memory allocation inconsistencies, exploit requires concurrent access to ring buffer.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.16% chance of exploitation in 30 days
View the NVD record ↗

Details

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

References

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