CVE-2026-74468— 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存在安全漏洞，该漏洞源于pch_irq_type()回调在中断禁用且不可睡眠的上下文中使用了常规自旋锁spinlock_t，在PREEMPT_RT内核中可能导致非法睡眠，引发内核崩溃。
影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 38eb18a6f92da886fc1af509d25e8f7a49e23d9a< efc76a3f5353dd33a2e2ad48200cd4a18de30a0d |
affected |
38eb18a6f92da886fc1af509d25e8f7a49e23d9a< 935e6872db7faecfbe1a10b3f5d97a62fdff5ec9 |
affected | ||
38eb18a6f92da886fc1af509d25e8f7a49e23d9a< 98f292cb6d01487d17988d9fd4e19c13e7adb156 |
affected | ||
38eb18a6f92da886fc1af509d25e8f7a49e23d9a< 16da33cb36e663b6967112185e11d00ce8ff957c |
affected | ||
38eb18a6f92da886fc1af509d25e8f7a49e23d9a< ff050589a21967883bb55f6dba42568f8367ad4a |
affected | ||
38eb18a6f92da886fc1af509d25e8f7a49e23d9a< 466ab0c41d5f54f71cee60619d07c4abd0ffd2cd |
affected | ||
38eb18a6f92da886fc1af509d25e8f7a49e23d9a< c0a4ec89fc26e4b679b04f1002c503cb2529acdc |
affected | ||
38eb18a6f92da886fc1af509d25e8f7a49e23d9a< a02b8950d619123da64f69b70fe1dadef217dfe4 |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2026-74468 基础信息
漏洞信息
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Vulnerability Title
gpio: pch: use raw_spinlock_t for the register lock
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
gpio: pch: use raw_spinlock_t for the register lock
pch_irq_type() is registered as the irq_chip .irq_set_type callback and
takes chip->spinlock with spin_lock_irqsave(). This callback is reached
from __setup_irq() -> __irq_set_trigger() -> chip->irq_set_type() while
the caller holds desc->lock, a raw_spinlock_t, with hardirqs disabled.
That context is not sleepable, but on PREEMPT_RT a regular spinlock_t is
an rtmutex-backed sleeping lock, so acquiring it there is invalid.
This was confirmed on a PREEMPT_RT kernel with lockdep
(PROVE_RAW_LOCK_NESTING and DEBUG_ATOMIC_SLEEP). A grounded PoC mirrored
pch_irq_type()'s locking and drove it through the real genirq carrier
irq_set_irq_type() -> __irq_set_trigger() -> chip->irq_set_type(), i.e.
the same __irq_set_trigger() edge that __setup_irq() takes for a
requested IRQ. With the original spin_lock_irqsave() edge lockdep
reported an invalid wait context, immediately followed by:
BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:48
in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 95, name: insmod
hardirqs last disabled at (3784): _raw_spin_lock_irqsave+0x4f/0x60
rt_spin_lock+0x3a/0x1c0
repro_irq_set_type+0x64/0xa0 [pch_repro]
__irq_set_trigger+0x69/0x140
irq_set_irq_type+0x78/0xd0
Switching the mirrored lock to raw_spinlock_t made both splats go away.
Convert the register lock to raw_spinlock_t. The same lock also
serializes the GPIO direction/value callbacks and the suspend/resume
register save/restore, but all of those critical sections only perform
MMIO register accesses (ioread32()/iowrite32()) and
irq_set_handler_locked(); none of them contain sleepable operations.
Keeping this register lock non-sleeping is therefore appropriate for the
irqchip callbacks and does not change the GPIO-side locking contract.
This is the same class of issue and fix as recently addressed for other
GPIO controllers, e.g. commit 286533cb14a3 ("gpio: sch: use raw_spinlock_t
in the irq startup path") and commit 90f0109019e6 ("gpio: eic-sprd: use
raw_spinlock_t in the irq startup path").
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存在安全漏洞，该漏洞源于pch_irq_type()回调在中断禁用且不可睡眠的上下文中使用了常规自旋锁spinlock_t，在PREEMPT_RT内核中可能导致非法睡眠，引发内核崩溃。
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-2026-74468 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-74468 补丁与修复 (6)
同批安全公告 · Linux · 2026-08-15 · 共 844 条
| 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-2026-74475 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72421 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74309 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72407 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72408 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72493 | 9.9 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72319 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72220 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72217 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74384 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72299 | 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-2026-72317 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72209 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74268 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72207 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74267 | 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-2026-74468
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