CVE-2026-90338— amba-pl011 串口控制台时钟管理缺陷
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。
在 Linux 内核中，以下漏洞已得到修复： serial: amba-pl011: 在原子写入时保持控制台时钟启用 在 nbcon 原子上下文中运行，在该上下文中不允许睡眠。它调用了 ，该函数会获取 common-clk 的 。在 PREEMPT_RT 配置下，这是一把可睡眠的锁： 首先尝试 ，但在发生竞争时回退到 。因此，在启用了基于时钟控制的 pl011 的 RT 内核上，原子上下文中的 可能触发： BUG: 在无效上下文中调用了可睡眠函数 at spinlock_rt.c:48 __might_resche
影响版本矩阵 8
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 2eb2608618ce5878e11bbe68cc8d2699c8f3a81a< 5b77848423f4a5a362dcc3caedcdc1a75d0758c3 |
affected |
2eb2608618ce5878e11bbe68cc8d2699c8f3a81a< 2ad24c1d0b939d814a3020f96a667ac2d0394289 |
affected | ||
2eb2608618ce5878e11bbe68cc8d2699c8f3a81a< c0e8cfef754645856374e82c8effd54b7d82002b |
affected | ||
6.15 |
affected | ||
< 6.15 |
unaffected | ||
6.18.52≤ 6.18.* |
unaffected | ||
7.2.6≤ 7.2.* |
unaffected | ||
7.3-rc1≤ * |
unaffected |
获取后续新漏洞提醒
登录后订阅
一、 漏洞 CVE-2026-90338 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
serial: amba-pl011: keep console clock enabled for atomic writes
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
serial: amba-pl011: keep console clock enabled for atomic writes
pl011_console_write_atomic() runs from nbcon atomic context, where
sleeping is not allowed. It calls clk_enable(), which takes the common-clk
enable_lock. Under PREEMPT_RT that is a sleeping lock:
clk_enable_lock() first tries spin_trylock_irqsave(), but on contention
falls back to spin_lock_irqsave(). Therefore, an atomic-context printk on
an RT kernel with a clk-backed pl011 can trip:
BUG: sleeping function called from invalid context at spinlock_rt.c:48
__might_resched from rt_spin_lock
rt_spin_lock from clk_enable_lock
clk_enable_lock from clk_enable
clk_enable from pl011_console_write_atomic
... from vprintk_emit
This was found and reproduced on PREEMPT_RT. Arm32 and arm64 DT SoCs are
affected; arm64 SBSA/ACPI has no clk, so clk_enable(NULL) short-circuits
before the lock. In addition, write_atomic() may be invoked from NMI
context and is documented to avoid locking. Removing clk_enable() from
the callback also avoids a potentially unsafe NMI acquisition of the
common-clock enable_lock.
An nbcon atomic-capable console must be printable from any context, so
the clock cannot be gated between writes. Enable the clock while the
console is available for output: use clk_prepare_enable() in
pl011_console_setup(), release it via clk_disable_unprepare() in the
console .exit() callback, and drop the per-write clk_enable()/clk_disable()
pairs from write_atomic() and write_thread().
When printk suspends consoles, drop the reference after
uart_suspend_port() stops console access and restore it before
uart_resume_port() -- but only if suspend actually marked the port
suspended (a wake-capable tty stays running and must keep its clock), and
keep it when console_suspend_enabled is false so no_console_suspend works.
The active power cost of keeping the clock enabled is platform-dependent:
none where the UART clock is a fixed always-on oscillator, real where it
is a gateable clock branch, which then cannot be gated (nor possibly can
its parent clocks) while the console is available for output. When serial
core actually suspends the port, the reference is released so the clock
provider can gate the clock tree.
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
受影响产品
二、漏洞 CVE-2026-90338 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-2026-90338 的情报信息
请登录查看更多情报信息。
CVE-2026-90338 补丁与修复 (3)
同批安全公告 · Linux · 2026-09-17 · 共 600 条
| CVE-2026-92489 | 9.8 CRITICAL | Linux内核 xfrm 双重释放漏洞 |
| CVE-2026-90104 | 9.8 CRITICAL | NFSv4.1 解码前未清空调用列表 |
| CVE-2026-90235 | 9.8 CRITICAL | 内核sunrpc xprtsock并发读取修复 |
| CVE-2026-90173 | 9.8 CRITICAL | SMB SmbDirect 释放完成队列漏洞 |
| CVE-2026-90151 | 9.8 CRITICAL | NFSv4客户端分配失败回调处理漏洞 |
| CVE-2026-90110 | 9.4 CRITICAL | inetpeer 随机化RB树节点比较 |
| CVE-2026-90413 | 9.1 CRITICAL | IB/isert 登录PDU数据长度校验漏洞 |
| CVE-2026-90414 | 9.1 CRITICAL | IB/isert拒绝声明超出实际接收数据的PDU |
| CVE-2026-90230 | 9.1 CRITICAL | Linux内核Nvme-target堆越界读取漏洞 |
| CVE-2026-90256 | 8.8 HIGH | Linux Bluetooth L2CAP 远程代码执行漏洞 |
| CVE-2026-90357 | 8.8 HIGH | mt76驱动MT7915无线局域网远程拒绝服务漏洞 |
| CVE-2026-90286 | 8.8 HIGH | AMDGPU GFX6 计算队列PFP使用漏洞 |
| CVE-2026-90381 | 8.8 HIGH | Linux内核mt76驱动无线信道切换漏洞 |
| CVE-2026-90380 | 8.8 HIGH | MT76驱动 mt792x 使用释放后内存漏洞 |
| CVE-2026-90329 | 8.8 HIGH | Linux 内核 HID 驱动探测清理同步漏洞 |
| CVE-2026-93042 | 8.8 HIGH | Linux内核dmaengine模块资源耗尽漏洞 |
| CVE-2026-90162 | 8.8 HIGH | Linux ksmbd 锁授予UAF/双重释放竞态漏洞 |
| CVE-2026-90379 | 8.8 HIGH | Linux 内核 mt76 驱动系统崩溃漏洞 |
| CVE-2026-90367 | 8.8 HIGH | Linux内核MT7996驱动死锁漏洞 |
| CVE-2026-90371 | 8.8 HIGH | mt76 无线驱动 RXDMAD_C 竞态修复 |
显示前 20 条，共 600 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-90338
暂无评论