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HIGH

CVE-2026-89501

CVSS v3

7.8

HIGH

EPSS Score

0.2 %

exploit probability, as of 2026-09-29

CISA KEV

No

known exploited

Exploitation

—

SSVC status

Description

In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Hold cpu_buffer::lock when resizing a subbuf Because, ring_buffer_subbuf_order_set() can clear cpu_buffer->free_page, hold cpu_buffer->lock to prevent races with ring_buffer_alloc_read_page() and ring_buffer_free_read_page().

Technical details

Published
2026-09-11
Last Modified
2026-09-13

Frequently asked questions

What is CVE-2026-89501?

In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Hold cpu_buffer::lock when resizing a subbuf Because, ring_buffer_subbuf_order_set() can clear cpu_buffer->free_page, hold cpu_buffer->lock to prevent races with ring_buffer_alloc_read_page() and ring_buffer_free_read_page().

Is CVE-2026-89501 actively exploited?

Active exploitation of CVE-2026-89501 has not been confirmed. Its EPSS score was 0.2% on 2026-09-29, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-89501?

CVE-2026-89501 has a CVSS v3 base score of 7.8 (HIGH severity).

Is CVE-2026-89501 affecting your environment?

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