CVE-2026-46246
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk2th percentile - higher than 2% of all known CVEs
Summary
A vulnerability has been identified in the Linux kernel related to use-after-free in the interrupt handling for `extcon`. This issue occurs when the IRQ request happens before the `extcon` handle is registered, potentially leading to system crashes or memory corruption.
Risk Assessment
Organizations may experience serious stability issues, including crashes that could result in data loss or service downtime.
Recommendation
It is recommended to update the Linux kernel to a version that fixes this vulnerability to ensure that the IRQ request occurs after the registration of the `extcon` handle.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: power: supply: pm8916_lbc: Fix use-after-free for extcon in IRQ handler Using the `devm_` variant for requesting IRQ _before_ the `devm_` variant for allocating/registering the `extcon` handle, means that the `extcon` 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 `extcon` handle has been freed, *but* just _before_ the corresponding unregistration of the IRQ handler has run. This will lead to the IRQ handler calling `extcon_set_state_sync()` with a freed `extcon` handle. Which usually crashes the system or otherwise silently corrupts the memory... Fix this racy use-after-free by making sure the IRQ is requested _after_ the registration of the `extcon` handle.