CVE-2026-23440— 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IPSec ESN更新处理存在竞争条件，可能导致状态不一致。
可能的 ATT&CK 技术 1 AI
T1564.001 · Hidden Files and Directories影响版本矩阵 12
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | fef06678931ff67b158d337b581e5cf5ca40a3a3< 3dffc083292e6872787bd7e34b957627622f9af4 |
affected |
fef06678931ff67b158d337b581e5cf5ca40a3a3< 2051c709dce92da3550040aa7949cd5a9c89b14e |
affected | ||
fef06678931ff67b158d337b581e5cf5ca40a3a3< 96c9c25b74686ac2de15921c9ad30c5ef13af8cd |
affected | ||
fef06678931ff67b158d337b581e5cf5ca40a3a3< 8d625c15471fb8780125eaef682983a96af77bdc |
affected | ||
fef06678931ff67b158d337b581e5cf5ca40a3a3< beb6e2e5976a128b0cccf10d158124422210c5ef |
affected | ||
6.4 |
affected | ||
< 6.4 |
unaffected | ||
6.6.130≤ 6.6.* |
unaffected | ||
| … +4 条更多 | |||
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一、 漏洞 CVE-2026-23440 基础信息
漏洞信息
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Vulnerability Title
net/mlx5e: Fix race condition during IPSec ESN update
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
net/mlx5e: Fix race condition during IPSec ESN update
In IPSec full offload mode, the device reports an ESN (Extended
Sequence Number) wrap event to the driver. The driver validates this
event by querying the IPSec ASO and checking that the esn_event_arm
field is 0x0, which indicates an event has occurred. After handling
the event, the driver must re-arm the context by setting esn_event_arm
back to 0x1.
A race condition exists in this handling path. After validating the
event, the driver calls mlx5_accel_esp_modify_xfrm() to update the
kernel's xfrm state. This function temporarily releases and
re-acquires the xfrm state lock.
So, need to acknowledge the event first by setting esn_event_arm to
0x1. This prevents the driver from reprocessing the same ESN update if
the hardware sends events for other reason. Since the next ESN update
only occurs after nearly 2^31 packets are received, there's no risk of
missing an update, as it will happen long after this handling has
finished.
Processing the event twice causes the ESN high-order bits (esn_msb) to
be incremented incorrectly. The driver then programs the hardware with
this invalid ESN state, which leads to anti-replay failures and a
complete halt of IPSec traffic.
Fix this by re-arming the ESN event immediately after it is validated,
before calling mlx5_accel_esp_modify_xfrm(). This ensures that any
spurious, duplicate events are correctly ignored, closing the race
window.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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IPSec ESN更新处理存在竞争条件，可能导致状态不一致。
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-2026-23440 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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同批安全公告 · Linux · 2026-04-03 · 共 71 条
| CVE-2026-31402 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-23450 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-23427 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-23428 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-23455 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-23461 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23425 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23462 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23457 | 8.6 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23459 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23456 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-31393 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-31392 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-31401 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23466 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23437 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23458 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23444 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23445 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23449 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 71 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-23440
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