In the Linux kernel, the following vulnerability has been resolved:
ring-buffer: Fix reader locking when changing the sub buffer order
The function ring_buffer_subbuf_order_set() updates each ring_buffer_per_cpu and installs new sub buffers that match the requested page order. This operation may be invoked concurrently with readers that rely on some of the modified data, such as the head bit (RB_PAGE_HEAD), or the ring_buffer_per_cpu.pages and reader_page pointers. However, no exclusive access is acquired by ring_buffer_subbuf_order_set(). Modifying the mentioned data while a reader also operates on them can then result in incorrect memory access and various crashes.
Fix the problem by taking the reader_lock when updating a specific ring_buffer_per_cpu in ring_buffer_subbuf_order_set().
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 27, 2026 | Jul 27, 2026 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Nov 8, 2024 |
| Ubuntu | — | Upgrade linux-image-6.8.0-1026-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-1023-gkeUpgrade linux-image-gkeUpgrade linux-image-genericUpgrade linux-image-6.8.0-58-lowlatency-64kUpgrade linux-image-6.8.0-1027-awsUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-1027-azure-fdeUpgrade linux-image-6.8.0-1027-azureUpgrade linux-image-6.8.0-2023-raspi-realtimeUpgrade linux-image-6.8.0-1026-nvidiaUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-gcp-lts-24.04Upgrade linux-image-6.11.0-18-genericUpgrade linux-image-awsUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-oracleUpgrade linux-image-oem-24.04Upgrade linux-image-6.8.0-1024-oracleUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-nvidia-6.8Upgrade linux-image-6.8.0-1028-gcp-64kUpgrade linux-image-6.8.0-1026-nvidia-64kUpgrade linux-image-aws-lts-24.04Upgrade linux-image-6.11.0-1009-gcpUpgrade linux-image-gcp-64kUpgrade linux-image-gkeopUpgrade linux-image-6.11.0-18-generic-64kUpgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-6.11.0-1010-lowlatency-64kUpgrade linux-image-6.8.0-1010-gkeopUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-oem-22.04dUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-realtimeUpgrade linux-image-virtualUpgrade linux-image-6.8.0-1024-ibmUpgrade linux-image-kvmUpgrade linux-image-6.11.0-1009-awsUpgrade linux-image-6.11.0-1005-realtimeUpgrade linux-image-6.11.0-1011-oracle-64kUpgrade linux-image-6.8.0-1014-azure-nvidiaUpgrade linux-image-6.11.0-1009-azure-fdeUpgrade linux-image-6.8.0-1026-oemUpgrade linux-image-nvidiaUpgrade linux-image-6.8.0-58-generic-64kUpgrade linux-image-realtime-hwe-24.04Upgrade linux-image-lowlatencyUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-raspiUpgrade linux-image-oem-24.04aUpgrade linux-image-6.8.0-1028-raspiUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-raspi-realtimeUpgrade linux-image-oracle-64kUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-oem-22.04bUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-6.11.0-1008-raspiUpgrade linux-image-gcpUpgrade linux-image-6.11.0-1009-azureUpgrade linux-image-azure-fdeUpgrade linux-image-gkeop-6.8Upgrade linux-image-6.8.0-1026-nvidia-lowlatencyUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-6.8.0-1028-gcpUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-6.8.0-58-genericUpgrade linux-image-azureUpgrade linux-image-6.11.0-1015-oemUpgrade linux-image-ibmUpgrade linux-image-generic-64kUpgrade linux-image-lowlatency-64kUpgrade linux-image-6.8.1-1020-realtimeUpgrade linux-image-oem-22.04aUpgrade linux-image-6.11.0-1010-lowlatencyUpgrade linux-image-oem-22.04Upgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-6.8.0-1024-oracle-64kUpgrade linux-image-nvidia-64kUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-6.8.0-58-lowlatencyUpgrade linux-image-6.11.0-1011-oracleUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-azure-nvidiaUpgrade linux-image-generic-lpaeUpgrade linux-image-oem-24.04bUpgrade linux-image-azure-lts-24.04Upgrade linux-image-oem-22.04cUpgrade linux-image-ibm-classic | Feb 20, 2025 | Nov 8, 2024 |
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