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CVE-2026-99160— ring-buffer: Do not show buffer_meta for CPUs without a buffer

Quick assessment

Affected

Linux Linux

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，以下漏洞已得到修复： ring-buffer：不要为没有缓冲区的 CPU 显示 buffer_meta per_cpu/cpuN/buffer_meta 文件是为所有可能的 CPU 创建的，但 buffer->buffers[cpu] 仅在 CPU 上线时才进行分配。读取从未上线过的 CPU 对应的文件时，会在 rbm_start() 函数中解引用一个为 NULL 的 cpu_buffer 指针，从而导致潜在问题。修复方案是：当 CPU 没有缓冲区时，在打开文件时返回 -ENODEV 错误

AI Predicted 5.5 Difficulty: Moderate Updated Oct 28, 2026

Possible ATT&CK Techniques 1 AI

T1213 · Data from Information Repositories

Affected Version Matrix 8

Vendor	Product	Version Range	Status
Linux	Linux	`950032ffcee7a43c960951940059afc5a2bdbcbc< 8512d0312cc0ea83ca4511b164c29a138bbb0c21`	affected
		`950032ffcee7a43c960951940059afc5a2bdbcbc< ae670c1a24fb5ffb167f26358cf47a5f0abbd670`	affected
		`950032ffcee7a43c960951940059afc5a2bdbcbc< 3f23cae09a4677a3f7c163a68388512cb231ff22`	affected
		`6.12`	affected
		`< 6.12`	unaffected
		`6.18.59≤ 6.18.*`	unaffected
		`7.2.13≤ 7.2.*`	unaffected
		`7.3≤ *`	unaffected

Updated Oct 28, 2026

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Vulnerability Information

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Vulnerability Title

ring-buffer: Do not show buffer_meta for CPUs without a buffer

Source: CVE Program / CVE List V5

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Do not show buffer_meta for CPUs without a buffer The per_cpu/cpuN/buffer_meta files are created for every possible CPU, but buffer->buffers[cpu] is only allocated once that CPU comes online. Reading the file of a CPU that never came online dereferences a NULL cpu_buffer in rbm_start(). Fail the open with -ENODEV when the CPU has no buffer, as the other per CPU ring buffer interfaces do.

Source: CVE Program / CVE List V5

CVSS Information

N/A

Source: CVE Program / CVE List V5

Vulnerability Type

N/A

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Linux	Linux	950032ffcee7a43c960951940059afc5a2bdbcbc ~ 8512d0312cc0ea83ca4511b164c29a138bbb0c21	-
Linux	Linux	6.12	-

II. Public POCs for CVE-2026-99160

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-99160

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Patches & Fixes for CVE-2026-99160 (1)

🔗 ring-buffer: Do not show buffer_meta for CPUs without a buffer - kernel/git/stable/linux.git - Linux kernel stable tree Read full article

https://www.cve.org/CVERecord?id=CVE-2026-99160

Same Patch Batch · Linux · 2026-10-28 · 117 CVEs total

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CVE-2026-99154		scsi: libiscsi: Reject a negative task index from parse_pdu_itt
CVE-2026-99151		drm/amd/display: Fix NULL sink dereference in USB4 bandwidth functions
CVE-2026-99153		scsi: libiscsi: Validate the ITT reflected in a Reject PDU
CVE-2026-99152		scsi: libiscsi: Validate the task named by a management response
CVE-2026-99150		drm/amdgpu: don't drop the runtime PM reference twice in amdgpu_gpr

Showing top 20 of 117 CVEs. View all on vendor page → →

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