CVE-2026-45936
published 2026-05-27CVE-2026-45936: In the Linux kernel, the following vulnerability has been resolved: power: supply: goldfish: Fix use-after-free in power_supply_changed() Using the `devm_`…
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.
Affected
10 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= 84d7b768748943db2bb658b43931fdab04c224cc < 589d4fe56713c6344cd9f8939f9c7621c85f0966 | 589d4fe56713c6344cd9f8939f9c7621c85f0966 |
| linux | linux | >= 84d7b768748943db2bb658b43931fdab04c224cc < bad8b61eb5059acd88349680e47839342dc89e94 | bad8b61eb5059acd88349680e47839342dc89e94 |
| linux | linux | >= 84d7b768748943db2bb658b43931fdab04c224cc < 33751e28842bf5aee5ef7b2b8d5e456a069095cb | 33751e28842bf5aee5ef7b2b8d5e456a069095cb |
| linux | linux | >= 84d7b768748943db2bb658b43931fdab04c224cc < 77ea437faa4c06362e3ecfd2d7264eaa7ac1e82c | 77ea437faa4c06362e3ecfd2d7264eaa7ac1e82c |
| linux | linux | >= 84d7b768748943db2bb658b43931fdab04c224cc < 4350505e82b4f972ddb788e1c712c557c38859d0 | 4350505e82b4f972ddb788e1c712c557c38859d0 |
| linux | linux | >= 84d7b768748943db2bb658b43931fdab04c224cc < 8c89aade8335e26a6a7dcda18992d15f51943927 | 8c89aade8335e26a6a7dcda18992d15f51943927 |
| linux | linux | >= 84d7b768748943db2bb658b43931fdab04c224cc < 0b29ffe4090a3fc7a7649de20e1eb1e53adddac7 | 0b29ffe4090a3fc7a7649de20e1eb1e53adddac7 |
| linux | linux | >= 84d7b768748943db2bb658b43931fdab04c224cc < b2ce982e2e0c888dc55c888ad0e20ea04daf2e6b | b2ce982e2e0c888dc55c888ad0e20ea04daf2e6b |
| linux | linux_kernel | — | — |