In the Linux kernel, the following vulnerability has been resolved:
power: supply: ab8500: 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()`.
Commit 1c1f13a006ed ("power: supply: ab8500: Move to componentized
binding") introduced this issue during a refactorization. Fix this racy
use-after-free by making sure the IRQ is requested _after_ the
registration of the `power_supply` handle.
References
Configurations
Configuration 1 (hide)
|
History
16 Jun 2026, 02:36
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.8 |
| First Time |
Linux linux Kernel
Linux |
|
| CWE | CWE-416 | |
| References | () https://git.kernel.org/stable/c/43cbb78ee047b9b12d096d40e3be265969d4c1f8 - Patch | |
| References | () https://git.kernel.org/stable/c/46dbda27b028d78087667e8280966b99cec015ca - Patch | |
| References | () https://git.kernel.org/stable/c/551672981fe227122258a25a385a05f5c0746ad6 - Patch | |
| References | () https://git.kernel.org/stable/c/709db4b476e254579d9c48ec34d397a41ca0c407 - Patch | |
| References | () https://git.kernel.org/stable/c/847eeb6c0efcd76c7def73857cf798a4fcd8f79b - Patch | |
| References | () https://git.kernel.org/stable/c/c4af8a98bb52825a5331ae1d0604c0ea6956ba4b - Patch | |
| References | () https://git.kernel.org/stable/c/f50433f2603def08b21a4bf2fd238687fb5cbde9 - Patch | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
27 May 2026, 14:17
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-27 14:17
Updated : 2026-06-16 02:36
NVD link : CVE-2026-45946
Mitre link : CVE-2026-45946
CVE.ORG link : CVE-2026-45946
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-416
Use After Free