CVE-2026-23400— 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rust_binder在持有proc锁时调用set_notification_done，可能导致死锁。
可能的 ATT&CK 技术 1 AI
T1499 · Endpoint Denial of Service影响版本矩阵 8
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | eafedbc7c050c44744fbdf80bdf3315e860b7513< dd109e3442817bc03ad1f3ffd541092f8c428141 |
affected |
eafedbc7c050c44744fbdf80bdf3315e860b7513< 3be72099067d2cd4a0e089696f19780f75b2b88a |
affected | ||
eafedbc7c050c44744fbdf80bdf3315e860b7513< 2e303f0febb65a434040774b793ba8356698802b |
affected | ||
6.18 |
affected | ||
< 6.18 |
unaffected | ||
6.18.19≤ 6.18.* |
unaffected | ||
6.19.9≤ 6.19.* |
unaffected | ||
7.0≤ * |
unaffected |
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一、 漏洞 CVE-2026-23400 基础信息
漏洞信息
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Vulnerability Title
rust_binder: call set_notification_done() without proc lock
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
rust_binder: call set_notification_done() without proc lock
Consider the following sequence of events on a death listener:
1. The remote process dies and sends a BR_DEAD_BINDER message.
2. The local process invokes the BC_CLEAR_DEATH_NOTIFICATION command.
3. The local process then invokes the BC_DEAD_BINDER_DONE.
Then, the kernel will reply to the BC_DEAD_BINDER_DONE command with a
BR_CLEAR_DEATH_NOTIFICATION_DONE reply using push_work_if_looper().
However, this can result in a deadlock if the current thread is not a
looper. This is because dead_binder_done() still holds the proc lock
during set_notification_done(), which called push_work_if_looper().
Normally, push_work_if_looper() takes the thread lock, which is fine to
take under the proc lock. But if the current thread is not a looper,
then it falls back to delivering the reply to the process work queue,
which involves taking the proc lock. Since the proc lock is already
held, this is a deadlock.
Fix this by releasing the proc lock during set_notification_done(). It
was not intentional that it was held during that function to begin with.
I don't think this ever happens in Android because BC_DEAD_BINDER_DONE
is only invoked in response to BR_DEAD_BINDER messages, and the kernel
always delivers BR_DEAD_BINDER to a looper. So there's no scenario where
Android userspace will call BC_DEAD_BINDER_DONE on a non-looper thread.
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rust_binder在持有proc锁时调用set_notification_done，可能导致死锁。
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-2026-23400 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-23400 补丁与修复 (3)
IV. Related Vulnerabilities
V. Comments for CVE-2026-23400
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