CVE-2026-72384

Summary

In the Linux kernel, the following vulnerability has been resolved:

irqchip/ts4800: Fix missing chained handler cleanup on remove

The driver installs a chained handler for the parent interrupt during probe using irq_set_chained_handler_and_data(), but the remove function does not clear this handler. This leaves a dangling handler that may be called when the parent interrupt fires after the driver has been removed, potentially accessing freed memory and causing a kernel crash.

Additionally, the parent_irq obtained via irq_of_parse_and_map() is not stored, making it inaccessible in the remove function. Moreover, interrupt mappings created during probe are not properly disposed.

Fix this by:

  • Saving parent_irq in probe
  • Clearing the chained handler with NULL in ts4800_ic_remove()
  • Disposing all IRQ mappings before domain removal to prevent resource leaks

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxd01f8633d52e4dac5ee598b87d49fd23346ccfd6 < b5b2b2cb6a91908e6c23958c9ce6d5ba2fdb686caffected
LinuxLinuxd01f8633d52e4dac5ee598b87d49fd23346ccfd6 < e6b674dc341c6add7d85bec2ec22caf1aad35795affected
LinuxLinuxd01f8633d52e4dac5ee598b87d49fd23346ccfd6 < 3f31f49afffa169cd01e6c37568c4df3eb1051afaffected
LinuxLinuxd01f8633d52e4dac5ee598b87d49fd23346ccfd6 < 4e8d498d32b6c67d73bb8b317ff316ff37897a3eaffected
LinuxLinuxd01f8633d52e4dac5ee598b87d49fd23346ccfd6 < 9ed0dca2aa05908b33ecf0bb15c7953947529542affected
LinuxLinuxd01f8633d52e4dac5ee598b87d49fd23346ccfd6 < 98bf7e54cec07d514b3575c11896a8b12d50ecc4affected
LinuxLinux4.5affected
LinuxLinux0 < 4.5unaffected
LinuxLinux6.1.178 <= 6.1.*unaffected
LinuxLinux6.6.145 <= 6.6.*unaffected
LinuxLinux6.12.97 <= 6.12.*unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References