In the Linux kernel, the following vulnerability has been resolved:
binder: fix OOB 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 to
acquire the node->lock first (lock nesting order). This can race with
binder_deferred_release() which removes the nodes from the proc->nodes
rbtree and adds them into binder_dead_nodes list. This leads to a broken
iteration in binder_add_freeze_work() as rb_next() will use data from
binder_dead_nodes, triggering an out-of-bounds access:
==================================================================
BUG: KASAN: global-out-of-bounds in rb_next+0xfc/0x124
Read of size 8 at addr ffffcb84285f7170 by task freeze/660
CPU: 8 UID: 0 PID: 660 Comm: freeze Not tainted 6.11.0-07343-ga727812a8d45 #18
Hardware name: linux,dummy-virt (DT)
Call trace:
rb_next+0xfc/0x124
binder_add_freeze_work+0x344/0x534
binder_ioctl+0x1e70/0x25ac
__arm64_sys_ioctl+0x124/0x190
The buggy address belongs to the variable:
binder_dead_nodes+0x10/0x40
[...]
==================================================================
This is possible because proc->nodes (rbtree) and binder_dead_nodes
(list) share entries in binder_node through a union:
struct binder_node {
[...]
union {
struct rb_node rb_node;
struct hlist_node dead_node;
};
Fix the race by checking that the proc is still alive. If not, simply
break out of the iteration.
References
Configurations
History
06 Mar 2025, 12:42
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| First Time |
Linux linux Kernel
Linux |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.1 |
| References | () https://git.kernel.org/stable/c/011e69a1b23011c0db3af4b8293fdd4522cc97b0 - Patch | |
| References | () https://git.kernel.org/stable/c/6b1be1da1f8279cf091266e71b5153c5b02aaff6 - Patch |
27 Dec 2024, 15:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2024-12-27 15:15
Updated : 2025-03-06 12:42
NVD link : CVE-2024-56555
Mitre link : CVE-2024-56555
JSON object : View
Products Affected
linux
- linux_kernel
CWE
No CWE.