Описание
In the Linux kernel, the following vulnerability has been resolved:
power: supply: sbs-battery: 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_sup...
In the Linux kernel, the following vulnerability has been resolved:
power: supply: sbs-battery: 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. Keep the old behavior of
just printing a warning in case of any failures during the IRQ request
and finishing the probe successfully.
Ссылки
- https://nvd.nist.gov/vuln/detail/CVE-2026-45916
- https://git.kernel.org/stable/c/14d4dee5d8fb361bfff275832087254beab66d72
- https://git.kernel.org/stable/c/2078830c32d1e49ac942c6f8c21f35c806ae5e94
- https://git.kernel.org/stable/c/8010b745b436c3e1ca5dd960aa29fa3e0f6d8841
- https://git.kernel.org/stable/c/82d3eb97a976c9d56bb92b241397610e57a9c629
- https://git.kernel.org/stable/c/861dda7a9074c0ff67788928165ae39d7f647491
- https://git.kernel.org/stable/c/8d59cf3887fbabacef53bfba473e33e8a8d9d07b
- https://git.kernel.org/stable/c/ca7dd71773e4e050b0fb98768b7eae60f8d1f38b
- https://git.kernel.org/stable/c/f1f472b14ad56104ba228b8fbec60d5b21829913
Связанные уязвимости
In the Linux kernel, the following vulnerability has been resolved: power: supply: sbs-battery: 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`...
In the Linux kernel, the following vulnerability has been resolved: power: supply: sbs-battery: 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`...
In the Linux kernel, the following vulnerability has been resolved: power: supply: sbs-battery: 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
In the Linux kernel, the following vulnerability has been resolved: p ...
ELSA-2026-50372: Unbreakable Enterprise kernel security update (IMPORTANT)