CVE-2026-46288

In the Linux kernel, the following vulnerability has been resolved: of: unittest: fix use-after-free in of_unittest_changeset() The variable 'parent' is assigned the value of 'nchangeset' earlier in the function, meaning both point to the same struct device_node. The call to of_node_put(nchangeset) can decrement the reference count to zero and free the node if there are no other holders. After that, the code still uses 'parent' to check for the presence of a property and to read a string property, leading to a use-after-free. Fix this by moving the of_node_put() call after the last access to 'parent', avoiding the UAF.

CVSS v3 8.4 HIGH

8.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.5 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/37318d1a27c9cc5a70d3cd7e49e30ec86f2b8ca1	Patch
https://git.kernel.org/stable/c/6fdad20b7975bdc32e85b45f8f7c640f6687b81f	Patch
https://git.kernel.org/stable/c/7f0f0926f3010b10cff5e93446258f971e42f2fd	Patch
https://git.kernel.org/stable/c/faecdd423c27f0d6090156a435ba9dbbac0eaddb	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 : 2026-06-08 17:16

Updated : 2026-07-23 08:10

NVD link : CVE-2026-46288

Mitre link : CVE-2026-46288

CVE.ORG link : CVE-2026-46288

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-416

Use After Free

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The call to\nof_node_put(nchangeset) can decrement the reference count to zero and\nfree the node if there are no other holders. After that, the code still\nuses 'parent' to check for the presence of a property and to read a\nstring property, leading to a use-after-free.\n\nFix this by moving the of_node_put() call after the last access to\n'parent', avoiding the UAF."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nof: unittest: corregir uso despu\u00e9s de liberaci\u00f3n en of_unittest_changeset()\n\nLa variable 'parent' se le asigna el valor de 'nchangeset' anteriormente en la funci\u00f3n, lo que significa que ambos apuntan a la misma estructura device_node. La llamada a of_node_put(nchangeset) puede decrementar el contador de referencias a cero y liberar el nodo si no hay otros poseedores. Despu\u00e9s de eso, el c\u00f3digo todav\u00eda usa 'parent' para verificar la presencia de una propiedad y para leer una propiedad de cadena, lo que lleva a un uso despu\u00e9s de liberaci\u00f3n.\n\nSolucione esto moviendo la llamada a of_node_put() despu\u00e9s del \u00faltimo acceso a 'parent', evitando el UAF."}], "lastModified": "2026-07-23T08:10:00.137", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A868CB0E-7563-461B-9681-F1CE80B353EE", "versionEndExcluding": "6.12.86", "versionStartIncluding": "6.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A10AC84F-C058-47D5-85B4-E6E51A613B74", "versionEndExcluding": "6.18.27", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CDB78D6D-22C3-4154-B0D0-94AF1CE5C2E3", "versionEndExcluding": "7.0.4", "versionStartIncluding": "6.19"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}