Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 84d7b768748943db2bb658b43931fdab04c224cc before 589d4fe56713c6344cd9f8939f9c7621c85f0966; affected 84d7b768748943db2bb658b43931fdab04c224cc before bad8b61eb5059acd88349680e47839342dc89e94; affected 84d7b768748943db2bb658b43931fdab04c224cc before 33751e28842bf5aee5ef7b2b8d5e456a069095cb; affected 84d7b768748943db2bb658b43931fdab04c224cc before 77ea437faa4c06362e3ecfd2d7264eaa7ac1e82c; affected 84d7b768748943db2bb658b43931fdab04c224cc before 4350505e82b4f972ddb788e1c712c557c38859d0; affected 84d7b768748943db2bb658b43931fdab04c224cc before 8c89aade8335e26a6a7dcda18992d15f51943927; affected 84d7b768748943db2bb658b43931fdab04c224cc before 0b29ffe4090a3fc7a7649de20e1eb1e53adddac7; affected 84d7b768748943db2bb658b43931fdab04c224cc before b2ce982e2e0c888dc55c888ad0e20ea04daf2e6b |
| Linux / Linux | affected 3.9; unaffected 0 before 3.9; unaffected 5.10.252 through 5.10.*; unaffected 5.15.202 through 5.15.*; unaffected 6.1.165 through 6.1.*; unaffected 6.6.128 through 6.6.*; unaffected 6.12.75 through 6.12.*; unaffected 6.18.14 through 6.18.*; unaffected 6.19.4 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/589d4fe56713c6344cd9f8939f9c7621c85f0966
- https://git.kernel.org/stable/c/bad8b61eb5059acd88349680e47839342dc89e94
- https://git.kernel.org/stable/c/33751e28842bf5aee5ef7b2b8d5e456a069095cb
- https://git.kernel.org/stable/c/77ea437faa4c06362e3ecfd2d7264eaa7ac1e82c
- https://git.kernel.org/stable/c/4350505e82b4f972ddb788e1c712c557c38859d0
- https://git.kernel.org/stable/c/8c89aade8335e26a6a7dcda18992d15f51943927
- https://git.kernel.org/stable/c/0b29ffe4090a3fc7a7649de20e1eb1e53adddac7
- https://git.kernel.org/stable/c/b2ce982e2e0c888dc55c888ad0e20ea04daf2e6b