CVE-2026-89500 Linux Kernel - Denial of Service

Linux kernel contains a memory management vulnerability caused by mismatched page order handling in ring-buffer's cpu_buffer during concurrent resize, letting attackers cause kernel crashes or memory leaks, exploit requires concurrent ring buffer resize.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.16% 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:L/AC:L/PR:L/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 with the fix applied.

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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