What’s Vulnerable › Vulnerabilities

CVE-2026-74652: serial: amba-pl011: cancel RS485 hrtimers after freeing IRQ

• Severity: high (CVSS 7.8 v3.1)
• 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: 2026-08-22 · updated 2026-10-14

Description

In the Linux kernel, the following vulnerability has been resolved: serial: amba-pl011: cancel RS485 hrtimers after freeing IRQ The RS485 trigger hrtimers are embedded in the devm-managed port and can fire after it is freed. The IRQ handler can arm a timer, so free the IRQ first and then cancel both timers. Complete the RS485 stop without arming a timer, and cancel the timers in remove() for the suspend-then-unbind path, where shutdown is not called. This issue was found by an in-house static analysis tool.

Affected products

• Linux kernel: 6.14 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/36672c8d7d14e9c43287528455d2c97b526ea6ad
• https://git.kernel.org/stable/c/759ead98a39fb625be302f9aa66290985dcaa325
• https://git.kernel.org/stable/c/e57f0aa5c35be37218ba0e4887b241584dd4b2d2

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