CVE-2026-45936

01/Description

In the Linux kernel, the following vulnerability has been resolved: power: supply: goldfish: Fix use-after-free in power_supply_changed() Using the `devm_` variant for requesting IRQ _before_ the `devm_` variant for allocating/registering the `power_supply` handle, means that the `power_supply` handle will be deallocated/unregistered _before_ the interrupt handler (since `devm_` naturally deallocates in reverse allocation order). This means that during removal, there is a race condition where an interrupt can fire just _after_ the `power_supply` handle has been freed, *but* just _before_ the corresponding unregistration of the IRQ handler has run. This will lead to the IRQ handler calling `power_supply_changed()` with a freed `power_supply` handle. Which usually crashes the system or otherwise silently corrupts the memory... Note that there is a similar situation which can also happen during `probe()`; the possibility of an interrupt firing _before_ registering the `power_supply` handle. This would then lead to the nasty situation of using the `power_supply` handle *uninitialized* in `power_supply_changed()`. Fix this racy use-after-free by making sure the IRQ is requested _after_ the registration of the `power_supply` handle.

02/Affected products

linux: linux kernel

03/References8

• git.kernel.org/stable/c/0b29ffe4090a3fc7a7649de20e1eb1e53adddac7 Patch
• git.kernel.org/stable/c/33751e28842bf5aee5ef7b2b8d5e456a069095cb Patch
• git.kernel.org/stable/c/4350505e82b4f972ddb788e1c712c557c38859d0 Patch
• git.kernel.org/stable/c/589d4fe56713c6344cd9f8939f9c7621c85f0966 Patch
• git.kernel.org/stable/c/77ea437faa4c06362e3ecfd2d7264eaa7ac1e82c Patch
• git.kernel.org/stable/c/8c89aade8335e26a6a7dcda18992d15f51943927 Patch
• git.kernel.org/stable/c/b2ce982e2e0c888dc55c888ad0e20ea04daf2e6b Patch
• git.kernel.org/stable/c/bad8b61eb5059acd88349680e47839342dc89e94 Patch