Description

In the Linux kernel, the following vulnerability has been resolved: binder: fix node UAF in binder_add_freeze_work() In binder_add_freeze_work() we iterate over the proc->nodes with the proc->inner_lock held. However, this lock is temporarily dropped in order to acquire the node->lock first (lock nesting order). This can race with binder_node_release() and trigger a use-after-free: ================================================================== BUG: KASAN: slab-use-after-free in _raw_spin_lock+0xe4/0x19c Write of size 4 at addr ffff53c04c29dd04 by task freeze/640 CPU: 5 UID: 0 PID: 640 Comm: freeze Not tainted 6.11.0-07343-ga727812a8d45 #17 Hardware name: linux,dummy-virt (DT) Call trace: _raw_spin_lock+0xe4/0x19c binder_add_freeze_work+0x148/0x478 binder_ioctl+0x1e70/0x25ac __arm64_sys_ioctl+0x124/0x190 Allocated by task 637: __kmalloc_cache_noprof+0x12c/0x27c binder_new_node+0x50/0x700 binder_transaction+0x35ac/0x6f74 binder_thread_write+0xfb8/0x42a0 binder_ioctl+0x18f0/0x25ac __arm64_sys_ioctl+0x124/0x190 Freed by task 637: kfree+0xf0/0x330 binder_thread_read+0x1e88/0x3a68 binder_ioctl+0x16d8/0x25ac __arm64_sys_ioctl+0x124/0x190 ================================================================== Fix the race by taking a temporary reference on the node before releasing the proc->inner lock. This ensures the node remains alive while in use.

Metrics

 

CVSS Version 4.0 CVSS Version 3.x CVSS Version 2.0

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CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score:  7.0 HIGH

Vector:  CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS 2.0 Severity and Vector Strings:

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
https://git.kernel.org/stable/c/38fbefeb2c140b581ed7de8117a5c90d6dd89c22	Patch
https://git.kernel.org/stable/c/dc8aea47b928cc153b591b3558829ce42f685074	Patch

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-416	Use After Free	NIST
CWE-362	Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')	NIST

Known Affected Software Configurations Switch to CPE 2.2

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Change History

2 change records found show changes

Initial Analysis by NIST 1/14/2025 12:23:22 PM

Action	Type	Old Value	New Value
Added	CVSS V3.1		NIST AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Added	CWE		NIST CWE-362
Added	CWE		NIST CWE-416
Added	CPE Configuration		OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.12 up to (excluding) 6.12.4
Changed	Reference Type	https://git.kernel.org/stable/c/38fbefeb2c140b581ed7de8117a5c90d6dd89c22 No Types Assigned	https://git.kernel.org/stable/c/38fbefeb2c140b581ed7de8117a5c90d6dd89c22 Patch
Changed	Reference Type	https://git.kernel.org/stable/c/dc8aea47b928cc153b591b3558829ce42f685074 No Types Assigned	https://git.kernel.org/stable/c/dc8aea47b928cc153b591b3558829ce42f685074 Patch

New CVE Received from kernel.org 12/27/2024 10:15:14 AM

Action	Type	Old Value	New Value
Added	Description		Record truncated, showing 500 of 1432 characters. View Entire Change Record In the Linux kernel, the following vulnerability has been resolved: binder: fix node UAF in binder_add_freeze_work() In binder_add_freeze_work() we iterate over the proc->nodes with the proc->inner_lock held. However, this lock is temporarily dropped in order to acquire the node->lock first (lock nesting order). This can race with binder_node_release() and trigger a use-after-free: ================================================================== BUG: KASAN: slab-use-after-free in _raw_s
Added	Reference		https://git.kernel.org/stable/c/38fbefeb2c140b581ed7de8117a5c90d6dd89c22
Added	Reference		https://git.kernel.org/stable/c/dc8aea47b928cc153b591b3558829ce42f685074