CVE-2026-72343— 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 5.17版本存在安全漏洞，该漏洞源于HV VHCA stats缓冲区分配不当，分配了零大小缓冲区，可能导致空指针取消引用并造成内核崩溃。
可能的 ATT&CK 技术 1 AI
T1203 · Exploitation for Client Execution影响版本矩阵 14
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | fa691d0c9c0812b9045f3a9420862e47b3b92518< 3b3a552cf88e10bb7bda88b29cf1fd8267043d50 |
affected |
fa691d0c9c0812b9045f3a9420862e47b3b92518< 5b927dcec5f1087942bf123a82e64a3f66475f01 |
affected | ||
fa691d0c9c0812b9045f3a9420862e47b3b92518< 22c1d5ecccf92c849bdca1556179aafc95794baf |
affected | ||
fa691d0c9c0812b9045f3a9420862e47b3b92518< 420aabb32da4381d8d7cdcaa6a77fad9eaceb0a4 |
affected | ||
fa691d0c9c0812b9045f3a9420862e47b3b92518< abc4c56427f144c96b2827a4db3b90eb5b7349a2 |
affected | ||
fa691d0c9c0812b9045f3a9420862e47b3b92518< 25f6b929c7e379cbea7cb8caa67b49b2d1efae17 |
affected | ||
5.17 |
affected | ||
< 5.17 |
unaffected | ||
| … +6 条更多 | |||
获取后续新漏洞提醒
登录后订阅
一、 漏洞 CVE-2026-72343 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
net/mlx5e: Fix HV VHCA stats zero-sized buffer allocation
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
net/mlx5e: Fix HV VHCA stats zero-sized buffer allocation
mlx5e_hv_vhca_stats_create() is called from mlx5e_nic_enable(),
before mlx5e_open(). At that point priv->stats_nch is still zero,
because it is only ever incremented in mlx5e_channel_stats_alloc(),
which is reached only from mlx5e_open_channel().
mlx5e_hv_vhca_stats_buf_size() therefore returns 0, and
kvzalloc(0, GFP_KERNEL) returns ZERO_SIZE_PTR ((void *)16) rather
than NULL. The "if (!buf)" guard does not catch this, and
mlx5e_hv_vhca_stats_create() completes "successfully" with
priv->stats_agent.buf set to ZERO_SIZE_PTR.
Once channels are opened (priv->stats_nch > 0) and the hypervisor
enables stats reporting, mlx5e_hv_vhca_stats_work() recomputes
buf_len using the new non-zero stats_nch and calls
memset(buf, 0, buf_len) on ZERO_SIZE_PTR, faulting at address 0x10.
Allocate the buffer based on priv->max_nch, which is set in
mlx5e_priv_init() and is the upper bound on stats_nch:
- Add a separate helper mlx5e_hv_vhca_stats_buf_max_size() that
returns sizeof(per_ring_stats) * max(max_nch, stats_nch), and
use it for the kvzalloc() in mlx5e_hv_vhca_stats_create().
- Keep mlx5e_hv_vhca_stats_buf_size() (which returns based on
stats_nch) for the worker's active payload size, so the wire
format (block->rings = stats_nch) and the amount of data filled
by mlx5e_hv_vhca_fill_stats() are unchanged.
The max(max_nch, stats_nch) guard handles the rare case where
mlx5e_attach_netdev() recomputes max_nch downward across a
detach/resume cycle while priv->stats_nch persists (mlx5e_detach_netdev
does not call mlx5e_priv_cleanup, so stats_nch is only reset when
the netdev is destroyed). Without the guard, the worker could compute
buf_len from stats_nch and overrun the smaller buffer allocated based
on the reduced max_nch.
Allocating a non-zero buffer also makes the kvzalloc() failure path in
mlx5e_hv_vhca_stats_create() reachable for the first time: it returns
early without (re)creating the agent. Clear
priv->stats_agent.{agent,buf} in mlx5e_hv_vhca_stats_destroy() after
freeing them, so that if a later create() bails out on this path, a
subsequent teardown does not double-free the stale agent/buffer left
from a previous enable/disable cycle.
This mirrors the existing mlx5e pattern of preallocating arrays of
size max_nch (e.g. priv->channel_stats) and lazily populating
entries up to stats_nch on demand.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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 5.17版本存在安全漏洞，该漏洞源于HV VHCA stats缓冲区分配不当，分配了零大小缓冲区，可能导致空指针取消引用并造成内核崩溃。
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-2026-72343 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-2026-72343 的情报信息
请登录查看更多情报信息。
CVE-2026-72343 补丁与修复 (5)
同批安全公告 · Linux · 2026-08-15 · 共 844 条
| CVE-2026-74475 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74280 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74279 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72421 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72408 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72407 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74309 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72493 | 9.9 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72041 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74436 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72210 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72211 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72209 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72299 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74434 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74433 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72473 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72472 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74545 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72322 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
显示前 20 条，共 844 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-72343
暂无评论