CVE-2026-46308

In the Linux kernel, the following vulnerability has been resolved: pmdomain: mediatek: fix use-after-free in scpsys_get_bus_protection_legacy() In scpsys_get_bus_protection_legacy(), of_find_node_with_property() returns a device node with its reference count incremented. The function then calls of_node_put(node) before checking whether syscon_regmap_lookup_by_phandle() returns an error. If an error occurs, dev_err_probe() dereferences the node pointer to print diagnostic information, but the node memory may have already been freed due to the earlier of_node_put(), leading to a use-after-free vulnerability. Fix this by moving the of_node_put() call after the error check, ensuring the node is still valid when accessed in the error path.

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/38d8410021b55d226847b2ac8d189d89fe5a8866	Patch
https://git.kernel.org/stable/c/cb27e43c0511e9e1ca8818d231656070b11c18cf	Patch
https://git.kernel.org/stable/c/ec1fcddb3117d9452210e838fd37389ee61e10e8	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:7.1:rc1::::::
	cpe:2.3:o:linux:linux_kernel:7.1:rc2::::::

History

No history.

Information

Published : 2026-06-08 17:16

Updated : 2026-07-23 08:10

NVD link : CVE-2026-46308

Mitre link : CVE-2026-46308

CVE.ORG link : CVE-2026-46308

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-416

Use After Free

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The function\nthen calls of_node_put(node) before checking whether\nsyscon_regmap_lookup_by_phandle() returns an error. If an error occurs,\ndev_err_probe() dereferences the node pointer to print diagnostic\ninformation, but the node memory may have already been freed due to the\nearlier of_node_put(), leading to a use-after-free vulnerability.\n\nFix this by moving the of_node_put() call after the error check, ensuring\nthe node is still valid when accessed in the error path."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\npmdomain: mediatek: soluciona el uso despu\u00e9s de liberaci\u00f3n en scpsys_get_bus_protection_legacy()\n\nEn scpsys_get_bus_protection_legacy(), of_find_node_with_property() devuelve un nodo de dispositivo con su contador de referencias incrementado. La funci\u00f3n luego llama a of_node_put(node) antes de verificar si syscon_regmap_lookup_by_phandle() devuelve un error. Si ocurre un error, dev_err_probe() desreferencia el puntero del nodo para imprimir informaci\u00f3n de diagn\u00f3stico, pero la memoria del nodo puede haber sido liberada ya debido a la llamada anterior a of_node_put(), lo que lleva a una vulnerabilidad de uso despu\u00e9s de liberaci\u00f3n.\n\nEsto se soluciona moviendo la llamada a of_node_put() despu\u00e9s de la verificaci\u00f3n de errores, asegurando que el nodo siga siendo v\u00e1lido cuando se accede a \u00e9l en la ruta de error."}], "lastModified": "2026-07-23T08:10:00.137", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9EB9FADE-E22F-41C2-9790-4F5564D59E62", "versionEndExcluding": "6.18.30", "versionStartIncluding": "6.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D0893CA7-9AE6-4DFE-AC75-48967D73AD8E", "versionEndExcluding": "7.0.7", "versionStartIncluding": "6.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0D38F0BF-A728-4133-A358-D44A2F7EE6D6"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}