CVE-2026-43432— Linux kernel 安全漏洞
一分钟漏洞结论
影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于xhci驱动在xhci_disable_slot()错误处理路径中仅使用kfree()释放命令结构，导致完成结构泄漏。
可能的 ATT&CK 技术 1 AI
T1499 · Endpoint Denial of Service影响版本矩阵 24
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | fee8be5bde562d4f5f9a100ca80c6d7072ed34c8< 1e800e26d54ccf2ddf2ea6d6cbe021c804d8aa62 |
affected |
02d5a2a48bb44e7404b794df87e57588b2fd604e< 6288baf0c8c4dcfbf206773aede9c1f2269cec28 |
affected | ||
7faac1953ed1f658f719cdf7bb7303fa5eef822c< 46aea90763832cd6e9b0c2e1c00e6a9512156d4b |
affected | ||
7faac1953ed1f658f719cdf7bb7303fa5eef822c< 2e2baa8fb5aa4d080cbfeb84c51eff797529f413 |
affected | ||
7faac1953ed1f658f719cdf7bb7303fa5eef822c< 807e4fb5140c73eb5dba1e399a990db5c1f3cdf8 |
affected | ||
7faac1953ed1f658f719cdf7bb7303fa5eef822c< c65f1b840ab8ce72ba68f1b63bab7960f8fdfa89 |
affected | ||
7faac1953ed1f658f719cdf7bb7303fa5eef822c< 078b446efc0f5e496c31bccb72b98af979963a83 |
affected | ||
7faac1953ed1f658f719cdf7bb7303fa5eef822c< c1c8550e70401159184130a1afc6261db01fc0ce |
affected | ||
| … +16 条更多 | |||
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一、 漏洞 CVE-2026-43432 基础信息
漏洞信息
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Vulnerability Title
usb: xhci: Fix memory leak in xhci_disable_slot()
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
usb: xhci: Fix memory leak in xhci_disable_slot()
xhci_alloc_command() allocates a command structure and, when the
second argument is true, also allocates a completion structure.
Currently, the error handling path in xhci_disable_slot() only frees
the command structure using kfree(), causing the completion structure
to leak.
Use xhci_free_command() instead of kfree(). xhci_free_command() correctly
frees both the command structure and the associated completion structure.
Since the command structure is allocated with zero-initialization,
command->in_ctx is NULL and will not be erroneously freed by
xhci_free_command().
This bug was found using an experimental static analysis tool we are
developing. The tool is based on the LLVM framework and is specifically
designed to detect memory management issues. It is currently under
active development and not yet publicly available, but we plan to
open-source it after our research is published.
The bug was originally detected on v6.13-rc1 using our static analysis
tool, and we have verified that the issue persists in the latest mainline
kernel.
We performed build testing on x86_64 with allyesconfig using GCC=11.4.0.
Since triggering these error paths in xhci_disable_slot() requires specific
hardware conditions or abnormal state, we were unable to construct a test
case to reliably trigger these specific error paths at runtime.
来源: CVE Program / CVE List V5
CVSS Information
N/A
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于xhci驱动在xhci_disable_slot()错误处理路径中仅使用kfree()释放命令结构，导致完成结构泄漏。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2026-43432 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-43432 补丁与修复 (8)
同批安全公告 · Linux · 2026-05-08 · 共 197 条
| CVE-2026-43384 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-43341 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-43304 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-43379 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-43378 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-43465 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-43414 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-43376 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-43402 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-43383 | 9.4 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-43407 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-43406 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-43284 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-43334 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-43322 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-43403 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-43391 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-43291 | 8.3 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-43466 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-43365 | 8.2 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 197 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-43432
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