CVE-2026-81005— 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基金会开源的一个操作系统内核。 Linux kernel 4.19版本存在安全漏洞，该漏洞源于ipmi_si驱动在注册失败回滚时未设置intf->in_shutdown，导致异步redo_bmc_reg工作项在底层驱动状态清理后重试BMC设备ID探测，将NULL的smi_info->si_sm指针传递给KCS状态机处理程序，造成空指针取消引用。
可能的 ATT&CK 技术 1 AI
T1059 · Command and Scripting Interpreter影响版本矩阵 20
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 2512e40e48d21d8bac09f7e91d2c3ceb2d3b50b2< 75ecc80ef0614a9f8441ab476fb748d3e919bea8 |
affected |
2512e40e48d21d8bac09f7e91d2c3ceb2d3b50b2< b11a1e545ad7a2f8f9ba7276b4ae9429c3399456 |
affected | ||
2512e40e48d21d8bac09f7e91d2c3ceb2d3b50b2< f390b0e781ca689515b659f94ef05f01497ed833 |
affected | ||
2512e40e48d21d8bac09f7e91d2c3ceb2d3b50b2< d377bf743f29b41729a084a633874ef9c1a13c6a |
affected | ||
2512e40e48d21d8bac09f7e91d2c3ceb2d3b50b2< d4be659a3e56f4eb16039ab8a1162efea086a714 |
affected | ||
2512e40e48d21d8bac09f7e91d2c3ceb2d3b50b2< 53af3a8bae0a93c1342e1b5519812203332aca8e |
affected | ||
2512e40e48d21d8bac09f7e91d2c3ceb2d3b50b2< 8ada17dd4c4ffd6b94621e735d77eda196ce118f |
affected | ||
2512e40e48d21d8bac09f7e91d2c3ceb2d3b50b2< 6d920a75df9a83ab096b3cde7a643b656e4fdfeb |
affected | ||
| … +12 条更多 | |||
获取后续新漏洞提醒
登录后订阅
一、 漏洞 CVE-2026-81005 基础信息
漏洞信息
对漏洞内容有疑问？看看神龙的深度分析是否有帮助！
查看神龙十问 ↗
尽管我们使用了先进的大模型技术，但其输出仍可能包含不准确或过时的信息。神龙努力确保数据的准确性，但请您根据实际情况进行核实和判断。
Vulnerability Title
ipmi: si: Fix NULL pointer dereference after failed registration
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
ipmi: si: Fix NULL pointer dereference after failed registration
try_smi_init() allocates new_smi->si_sm and later calls
ipmi_register_smi_mod(), which maps to ipmi_add_smi().
During ipmi_add_smi(), the upper IPMI message handler obtains the
initial BMC device information through __bmc_get_device_id(). This can
fail if the BMC does not return a successful response to the Get Device
ID command.
When the BMC returns a nonzero completion code, the device-id helper
retries the command and eventually returns -EIO if the device ID still
cannot be fetched.
On this failure path, ipmi_add_smi() logs "Unable to get the device id"
and goes to out_err_started, where it invokes the lower driver's
shutdown callback. try_smi_init() then logs the returned registration
failure:
ipmi_si IPI0001:00: IPMI message handler: Unable to get the device id: -5
ipmi_si IPI0001:00: Unable to register device: error -5
For ipmi_si, the shutdown callback is shutdown_smi(), which cleans up
the SI state machine data, frees smi_info->si_sm, and sets
smi_info->si_sm and smi_info->intf to NULL.
However, intf->in_shutdown is not set on this failed-registration
rollback path. Therefore, the asynchronous redo_bmc_reg work item can
still retry BMC device-id probing after the lower driver has already
cleared its SI state machine data. In the observed case, that retry path
reached start_next_msg(), which passed the NULL smi_info->si_sm pointer
to the selected KCS state machine handler:
BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
Workqueue: events redo_bmc_reg [ipmi_msghandler]
RIP: start_kcs_transaction+0x2c/0x190 [ipmi_si]
Call Trace:
start_next_msg+0x50/0x80 [ipmi_si]
check_start_timer_thread.part.9+0x3b/0x50 [ipmi_si]
sender+0x69/0x80 [ipmi_si]
i_ipmi_request+0x2ac/0x9d0 [ipmi_msghandler]
__get_device_id.isra.29+0xaa/0x180 [ipmi_msghandler]
__bmc_get_device_id+0xef/0x950 [ipmi_msghandler]
redo_bmc_reg+0x52/0x60 [ipmi_msghandler]
process_one_work+0x1a7/0x360
Set intf->in_shutdown on the out_err_started path before invoking the
lower driver's shutdown callback. This prevents later redo_bmc_reg
retries from using an interface whose lower driver state has been
cleaned up, and applies the same shutdown state to other IPMI interfaces
as well.
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基金会开源的一个操作系统内核。 Linux kernel 4.19版本存在安全漏洞，该漏洞源于ipmi_si驱动在注册失败回滚时未设置intf->in_shutdown，导致异步redo_bmc_reg工作项在底层驱动状态清理后重试BMC设备ID探测，将NULL的smi_info->si_sm指针传递给KCS状态机处理程序，造成空指针取消引用。
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-2026-81005 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
高级
未找到公开 POC。
登录以生成 AI POC三、漏洞 CVE-2026-81005 的情报信息
请登录查看更多情报信息。
CVE-2026-81005 补丁与修复 (8)
同批安全公告 · Linux · 2026-09-11 · 共 431 条
| CVE-2026-89688 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89656 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89655 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89658 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89660 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89659 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89662 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89669 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89674 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89675 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89676 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89677 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89681 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89686 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89703 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89479 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89478 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89702 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89482 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89708 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
显示前 20 条，共 431 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-81005
暂无评论