CVE-2026-45882
published 2026-05-27CVE-2026-45882: In the Linux kernel, the following vulnerability has been resolved: power: supply: pm8916_bms_vm: Fix use-after-free in power_supply_changed() Using the…
In the Linux kernel, the following vulnerability has been resolved:
power: supply: pm8916_bms_vm: 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
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= 098bce1838e0549228c8d426e5de72ec5594b5c4 < b69bb88e20c6f8e998dff3e13a316207f49d3fa2 | b69bb88e20c6f8e998dff3e13a316207f49d3fa2 |
| linux | linux | >= 098bce1838e0549228c8d426e5de72ec5594b5c4 < a8b7117ae3a791c6a328674d05a06cd45d8241bd | a8b7117ae3a791c6a328674d05a06cd45d8241bd |
| linux | linux | >= 098bce1838e0549228c8d426e5de72ec5594b5c4 < 17db6b3abd823c9fba3f3413c4f0f432d99d49dc | 17db6b3abd823c9fba3f3413c4f0f432d99d49dc |
| linux | linux | >= 098bce1838e0549228c8d426e5de72ec5594b5c4 < 62914959b35e9a1e29cc0f64cb8cfc5075a5366f | 62914959b35e9a1e29cc0f64cb8cfc5075a5366f |
| linux | linux_kernel | — | — |