CVE-2026-45916
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.16%). 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: 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.
- 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
- 0.16% probability · 6th 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/14d4dee5d8fb361bfff275832087254beab66d72Patch
- https://git.kernel.org/stable/c/2078830c32d1e49ac942c6f8c21f35c806ae5e94Patch
- https://git.kernel.org/stable/c/8010b745b436c3e1ca5dd960aa29fa3e0f6d8841Patch
- https://git.kernel.org/stable/c/82d3eb97a976c9d56bb92b241397610e57a9c629Patch
- https://git.kernel.org/stable/c/861dda7a9074c0ff67788928165ae39d7f647491Patch
- https://git.kernel.org/stable/c/8d59cf3887fbabacef53bfba473e33e8a8d9d07bPatch
- https://git.kernel.org/stable/c/ca7dd71773e4e050b0fb98768b7eae60f8d1f38bPatch
- https://git.kernel.org/stable/c/f1f472b14ad56104ba228b8fbec60d5b21829913Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.