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().

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.002.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
8e7b58c27b3c567316a51079b375b846f9223bba affected < 8a496aaa3da6e8d545896c2370c7e617cc931ae2
8e7b58c27b3c567316a51079b375b846f9223bba affected < 6fcb0b745a0b80df62eae4a93ce52a2d061f4ac2
8e7b58c27b3c567316a51079b375b846f9223bba affected < bf242baf58de03467f226c8e29554c9495dca7fc
8e7b58c27b3c567316a51079b375b846f9223bba affected < 24974bd0da1b47fd56c975533ead50abf754e74d
Linux Linux affected
Version Status Constraints
6.8 affected —
0 unaffected < 6.8
6.12.109 unaffected ≤ 6.12.*
6.18.50 unaffected ≤ 6.18.*
7.2.4 unaffected ≤ 7.2.*
7.3-rc1 unaffected ≤ *

No data.

No data.

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Project Subscriptions

Vendors Products
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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/24974bd0da1b47fd56c975533ead50abf754e74d cve-icon cve-icon cve-icon
https://git.kernel.org/stable/c/6fcb0b745a0b80df62eae4a93ce52a2d061f4ac2 cve-icon cve-icon cve-icon
https://git.kernel.org/stable/c/8a496aaa3da6e8d545896c2370c7e617cc931ae2 cve-icon cve-icon cve-icon
https://git.kernel.org/stable/c/bf242baf58de03467f226c8e29554c9495dca7fc cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-89501 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-89501 cve-icon
History

Sat, 12 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-413
References
Metrics threat_severity

None

 cvssV3_1

{'score': 4.7, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Fri, 11 Sep 2026 23:45:00 +0000

Type Values Removed Values Added
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().
Title ring-buffer: Hold cpu_buffer::lock when resizing a subbuf
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-09-11T19:43:50.063Z

Reserved: 2026-09-11T19:38:34.715Z

Link: CVE-2026-89501

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-11T20:19:32.303

Modified: 2026-09-11T20:19:32.303

Link: CVE-2026-89501

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-11T19:43:50Z

Links: CVE-2026-89501 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-12T10:00:08Z

Weaknesses