CVE-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_` variant for requesting IRQ _before_ the `devm_` variant for allocating/registering the…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.13%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.13% probability · 3th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/0b29ffe4090a3fc7a7649de20e1eb1e53adddac7Patch
- https://git.kernel.org/stable/c/33751e28842bf5aee5ef7b2b8d5e456a069095cbPatch
- https://git.kernel.org/stable/c/4350505e82b4f972ddb788e1c712c557c38859d0Patch
- https://git.kernel.org/stable/c/589d4fe56713c6344cd9f8939f9c7621c85f0966Patch
- https://git.kernel.org/stable/c/77ea437faa4c06362e3ecfd2d7264eaa7ac1e82cPatch
- https://git.kernel.org/stable/c/8c89aade8335e26a6a7dcda18992d15f51943927Patch
- https://git.kernel.org/stable/c/b2ce982e2e0c888dc55c888ad0e20ea04daf2e6bPatch
- https://git.kernel.org/stable/c/bad8b61eb5059acd88349680e47839342dc89e94Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.