CVE-2026-45879
published 2026-05-27CVE-2026-45879: In the Linux kernel, the following vulnerability has been resolved: power: supply: bq25980: Fix use-after-free in power_supply_changed() Using the `devm_`…
In the Linux kernel, the following vulnerability has been resolved:
power: supply: bq25980: 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 | >= 5069185fc18e810715a91d80fcd075e03add600c < 86f93dfb23f5bf4f285c4256a7e909d222f7de56 | 86f93dfb23f5bf4f285c4256a7e909d222f7de56 |
| linux | linux | >= 5069185fc18e810715a91d80fcd075e03add600c < 16875e3b7bc9e59bfa0acaf1e43f275a6f42a30f | 16875e3b7bc9e59bfa0acaf1e43f275a6f42a30f |
| linux | linux | >= 5069185fc18e810715a91d80fcd075e03add600c < 0560a4b09c92e2ecaa883965cf6f9ca51c158ff9 | 0560a4b09c92e2ecaa883965cf6f9ca51c158ff9 |
| linux | linux | >= 5069185fc18e810715a91d80fcd075e03add600c < 0de95d29d847c6217b7d5845e24a71a4aee7b359 | 0de95d29d847c6217b7d5845e24a71a4aee7b359 |
| linux | linux | >= 5069185fc18e810715a91d80fcd075e03add600c < 4aeaf03c17260415c2fdd55992f9ad4188d5455a | 4aeaf03c17260415c2fdd55992f9ad4188d5455a |
| linux | linux | >= 5069185fc18e810715a91d80fcd075e03add600c < 03d1e4ee4e6aa6d2966e883e4ca0e5be73bf1b7c | 03d1e4ee4e6aa6d2966e883e4ca0e5be73bf1b7c |
| linux | linux | >= 5069185fc18e810715a91d80fcd075e03add600c < abea607ff2f62f4c0a5fb29f7fbdaaab163276a4 | abea607ff2f62f4c0a5fb29f7fbdaaab163276a4 |
| linux | linux | >= 5069185fc18e810715a91d80fcd075e03add600c < 5f0b1cb41906e86b64bf69f5ededb83b0d757c27 | 5f0b1cb41906e86b64bf69f5ededb83b0d757c27 |
| linux | linux_kernel | — | — |