In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Free cpu_buffer::free_page with subbuf_order When sub-buffers use… (CVE-2026-89502)
A vulnerability in the Linux kernel's ring-buffer subsystem related to incorrect handling of cpu_buffer::free_page with subbuf_order has been resolved. The issue involved allocating cpu_buffer->free_page with the correct order when sub-buffers use an order greater than 0.
AI Analysis
Technical Summary
The Linux kernel had a vulnerability in the ring-buffer component where cpu_buffer->free_page was not freed using the correct subbuf_order when sub-buffers used an order greater than 0. This could lead to improper memory management within the ring-buffer implementation. The vulnerability has been addressed by ensuring cpu_buffer->free_page is freed with the correct order corresponding to subbuf_order.
Potential Impact
The impact details are not explicitly provided in the input data. The vulnerability relates to memory management in the kernel ring-buffer, which could potentially affect system stability or security, but no specific exploitation or impact scenarios are described.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to correctly free cpu_buffer->free_page with the appropriate subbuf_order. Users should apply the official kernel updates that include this fix. Patch status is not explicitly confirmed in the input data; therefore, check the Linux kernel vendor advisory for current remediation guidance.
In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Free cpu_buffer::free_page with subbuf_order When sub-buffers use… (CVE-2026-89502)
Description
A vulnerability in the Linux kernel's ring-buffer subsystem related to incorrect handling of cpu_buffer::free_page with subbuf_order has been resolved. The issue involved allocating cpu_buffer->free_page with the correct order when sub-buffers use an order greater than 0.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel had a vulnerability in the ring-buffer component where cpu_buffer->free_page was not freed using the correct subbuf_order when sub-buffers used an order greater than 0. This could lead to improper memory management within the ring-buffer implementation. The vulnerability has been addressed by ensuring cpu_buffer->free_page is freed with the correct order corresponding to subbuf_order.
Potential Impact
The impact details are not explicitly provided in the input data. The vulnerability relates to memory management in the kernel ring-buffer, which could potentially affect system stability or security, but no specific exploitation or impact scenarios are described.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to correctly free cpu_buffer->free_page with the appropriate subbuf_order. Users should apply the official kernel updates that include this fix. Patch status is not explicitly confirmed in the input data; therefore, check the Linux kernel vendor advisory for current remediation guidance.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-43ww-w2jp-2rjx
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-89502"]
Threat ID: 6aa4a01755bf5e2cf5a866f9
Added to database: 09/12/2026, 00:43:03 UTC
Last enriched: 09/12/2026, 01:13:03 UTC
Last updated: 09/12/2026, 01:13:03 UTC
Views: 2
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