What’s Vulnerable › Vulnerabilities

CVE-2026-90208: clocksource/drivers/samsung_pwm: Switch to raw_spinlock_t type

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-17 · updated 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: clocksource/drivers/samsung_pwm: Switch to raw_spinlock_t type Samsung PWM timer might be used as a clock source on some legacy systems. When PREEMPT_RT is enabled on ARM, regular spinlock is converted to a sleeping lock (mutex-based), which must not be used in atomic context such as hard interrupt handlers. Switch the samsung_pwm_lock to the raw_spinlock, which remains a true non-sleeping spinlock even under PREEMPT_RT.

Affected products

• Linux: 3.10 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/3b212f9d70805d91febae01d618868f4860e267c
• https://git.kernel.org/stable/c/5720fe5cabda19f395d194ca57321c7b85f8af80
• https://git.kernel.org/stable/c/7eb5764d25c4ac7f5d126621660f7219b61fd2fd
• https://git.kernel.org/stable/c/8f823b47eb889ea70f4c360164e96453f40e3646
• https://git.kernel.org/stable/c/9c97311a5f5d388eece66fc415167b38f35fe6a1
• https://git.kernel.org/stable/c/a25ea67a913f98b8461aff1e9e3a5f6dc2378395

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