CVE-2026-23348— 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，该漏洞源于创建nvdimm对象时nvdimm_bus对象存在竞争条件，可能导致空指针取消引用。
可能的 ATT&CK 技术 1 AI
T1203 · Exploitation for Client Execution影响版本矩阵 8
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 8fdcb1704f61a8fd9be0f3849a174d084def0666< 5fc4e150c5ada5f7d20d8f9f1b351f10481fbdf7 |
affected |
8fdcb1704f61a8fd9be0f3849a174d084def0666< 5b230daeee420833287cc77314439903e5312f10 |
affected | ||
8fdcb1704f61a8fd9be0f3849a174d084def0666< 96a1fd0d84b17360840f344826897fa71049870e |
affected | ||
5.14 |
affected | ||
< 5.14 |
unaffected | ||
6.18.17≤ 6.18.* |
unaffected | ||
6.19.7≤ 6.19.* |
unaffected | ||
7.0≤ * |
unaffected |
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一、 漏洞 CVE-2026-23348 基础信息
漏洞信息
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Vulnerability Title
cxl: Fix race of nvdimm_bus object when creating nvdimm objects
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
cxl: Fix race of nvdimm_bus object when creating nvdimm objects
Found issue during running of cxl-translate.sh unit test. Adding a 3s
sleep right before the test seems to make the issue reproduce fairly
consistently. The cxl_translate module has dependency on cxl_acpi and
causes orphaned nvdimm objects to reprobe after cxl_acpi is removed.
The nvdimm_bus object is registered by the cxl_nvb object when
cxl_acpi_probe() is called. With the nvdimm_bus object missing,
__nd_device_register() will trigger NULL pointer dereference when
accessing the dev->parent that points to &nvdimm_bus->dev.
[ 192.884510] BUG: kernel NULL pointer dereference, address: 000000000000006c
[ 192.895383] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS edk2-20250812-19.fc42 08/12/2025
[ 192.897721] Workqueue: cxl_port cxl_bus_rescan_queue [cxl_core]
[ 192.899459] RIP: 0010:kobject_get+0xc/0x90
[ 192.924871] Call Trace:
[ 192.925959] <TASK>
[ 192.926976] ? pm_runtime_init+0xb9/0xe0
[ 192.929712] __nd_device_register.part.0+0x4d/0xc0 [libnvdimm]
[ 192.933314] __nvdimm_create+0x206/0x290 [libnvdimm]
[ 192.936662] cxl_nvdimm_probe+0x119/0x1d0 [cxl_pmem]
[ 192.940245] cxl_bus_probe+0x1a/0x60 [cxl_core]
[ 192.943349] really_probe+0xde/0x380
This patch also relies on the previous change where
devm_cxl_add_nvdimm_bridge() is called from drivers/cxl/pmem.c instead
of drivers/cxl/core.c to ensure the dependency of cxl_acpi on cxl_pmem.
1. Set probe_type of cxl_nvb to PROBE_FORCE_SYNCHRONOUS to ensure the
driver is probed synchronously when add_device() is called.
2. Add a check in __devm_cxl_add_nvdimm_bridge() to ensure that the
cxl_nvb driver is attached during cxl_acpi_probe().
3. Take the cxl_root uport_dev lock and the cxl_nvb->dev lock in
devm_cxl_add_nvdimm() before checking nvdimm_bus is valid.
4. Set cxl_nvdimm flag to CXL_NVD_F_INVALIDATED so cxl_nvdimm_probe()
will exit with -EBUSY.
The removal of cxl_nvdimm devices should prevent any orphaned devices
from probing once the nvdimm_bus is gone.
[ dj: Fixed 0-day reported kdoc issue. ]
[ dj: Fix cxl_nvb reference leak on error. Gregory (kreview-0811365) ]
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，该漏洞源于创建nvdimm对象时nvdimm_bus对象存在竞争条件，可能导致空指针取消引用。
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-2026-23348 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-23348 补丁与修复 (3)
同批安全公告 · Linux · 2026-03-25 · 共 116 条
| CVE-2026-23395 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-31788 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23340 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23336 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23350 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23351 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23317 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23306 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23372 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23378 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23383 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23393 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23391 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23392 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23280 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23288 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23364 | 7.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23294 | 7.0 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23357 | Linux kernel 安全漏洞 | |
| CVE-2026-23354 | Linux kernel 安全漏洞 |
显示前 20 条，共 116 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-23348
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