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.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/23067259919663580c6f81801847cfc7bd54fd1f	Patch
https://git.kernel.org/stable/c/47abfc207ab02cf1297257e282e8048da63f0d08	Patch
https://git.kernel.org/stable/c/48e0f68b50c344bb2d78d65dd98f93e41276ee00	Patch
https://git.kernel.org/stable/c/9fab0120907e6965168e55b1e17cb9dfaf262b86	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

No history.

Information

Published : 2026-06-03 18:16

Updated : 2026-07-22 20:10

NVD link : CVE-2026-46246

Mitre link : CVE-2026-46246

CVE.ORG link : CVE-2026-46246

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-416

Use After Free

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This means that during removal, there is a race condition where\nan interrupt can fire just _after_ the `extcon` handle has been\nfreed, *but* just _before_ the corresponding unregistration of the IRQ\nhandler has run.\n\nThis will lead to the IRQ handler calling `extcon_set_state_sync()` with\na freed `extcon` handle. Which usually crashes the system or otherwise\nsilently corrupts the memory...\n\nFix this racy use-after-free by making sure the IRQ is requested _after_\nthe registration of the `extcon` handle."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\npower: supply: pm8916_lbc: Correcci\u00f3n de uso despu\u00e9s de liberaci\u00f3n para extcon en el gestor IRQ\n\nUsar la variante 'devm_' para solicitar IRQ _antes_ de la variante 'devm_' para asignar/registrar el manejador 'extcon', significa que el manejador 'extcon' ser\u00e1 desasignado/dado de baja _antes_ del gestor de interrupciones (ya que 'devm_' desasigna naturalmente en orden inverso de asignaci\u00f3n). Esto significa que durante la eliminaci\u00f3n, hay una condici\u00f3n de carrera donde una interrupci\u00f3n puede dispararse justo _despu\u00e9s_ de que el manejador 'extcon' haya sido liberado, pero justo _antes_ de que se haya ejecutado la correspondiente anulaci\u00f3n de registro del gestor IRQ.\n\nEsto llevar\u00e1 a que el gestor IRQ llame a 'extcon_set_state_sync()' con un manejador 'extcon' liberado. Lo que usualmente bloquea el sistema o de otra manera corrompe silenciosamente la memoria...\n\nCorrige este uso despu\u00e9s de liberaci\u00f3n propenso a condiciones de carrera asegur\u00e1ndose de que la IRQ sea solicitada _despu\u00e9s_ del registro del manejador 'extcon'."}], "lastModified": "2026-07-22T20:10:00.127", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BCE16369-98ED-41CF-8995-DFDC10B288D2", "versionEndExcluding": "6.12.75", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BF463CB7-1F58-4607-B847-77ED23E4B9B7", "versionEndExcluding": "6.18.14", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "672A3E79-EC03-479D-8503-361DFBDC8092", "versionEndExcluding": "6.19.4", "versionStartIncluding": "6.19"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}