CVE-2026-46246
CVE-2026-46246 is a high-severity vulnerability in Linux Linux Kernel with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-416.
Key facts
- Severity: High (CVSS 3.x base score 7.8)
- EPSS exploit prediction: 0% (3rd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-34108
- Weakness: CWE-416
- Affected product: Linux Linux Kernel
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is CVE-2026-46246?
- 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.
- How severe is CVE-2026-46246?
- CVE-2026-46246 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-46246 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-46246?
- CVE-2026-46246 affects Linux Linux Kernel. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-46246?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2026-46246 have an EU (EUVD) identifier?
- Yes. CVE-2026-46246 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-34108.
- When was CVE-2026-46246 published?
- CVE-2026-46246 was published on 2026-06-03 and last updated on 2026-06-17.
References
- https://git.kernel.org/stable/c/23067259919663580c6f81801847cfc7bd54fd1f
- https://git.kernel.org/stable/c/47abfc207ab02cf1297257e282e8048da63f0d08
- https://git.kernel.org/stable/c/48e0f68b50c344bb2d78d65dd98f93e41276ee00
- https://git.kernel.org/stable/c/9fab0120907e6965168e55b1e17cb9dfaf262b86
Affected products (1)
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
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