CVE-2024-56556 (GCVE-0-2024-56556)
Vulnerability from cvelistv5
Published
2024-12-27 14:23
Modified
2026-05-11 20:54
Severity ?
VLAI Severity ?
EPSS score ?
Summary
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.
References
Impacted products
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbinder: fix node UAF in binder_add_freeze_work()\n\nIn binder_add_freeze_work() we iterate over the proc-\u003enodes with the\nproc-\u003einner_lock held. However, this lock is temporarily dropped in\norder to acquire the node-\u003elock first (lock nesting order). This can\nrace with binder_node_release() and trigger a use-after-free:\n\n ==================================================================\n BUG: KASAN: slab-use-after-free in _raw_spin_lock+0xe4/0x19c\n Write of size 4 at addr ffff53c04c29dd04 by task freeze/640\n\n CPU: 5 UID: 0 PID: 640 Comm: freeze Not tainted 6.11.0-07343-ga727812a8d45 #17\n Hardware name: linux,dummy-virt (DT)\n Call trace:\n _raw_spin_lock+0xe4/0x19c\n binder_add_freeze_work+0x148/0x478\n binder_ioctl+0x1e70/0x25ac\n __arm64_sys_ioctl+0x124/0x190\n\n Allocated by task 637:\n __kmalloc_cache_noprof+0x12c/0x27c\n binder_new_node+0x50/0x700\n binder_transaction+0x35ac/0x6f74\n binder_thread_write+0xfb8/0x42a0\n binder_ioctl+0x18f0/0x25ac\n __arm64_sys_ioctl+0x124/0x190\n\n Freed by task 637:\n kfree+0xf0/0x330\n binder_thread_read+0x1e88/0x3a68\n binder_ioctl+0x16d8/0x25ac\n __arm64_sys_ioctl+0x124/0x190\n ==================================================================\n\nFix the race by taking a temporary reference on the node before\nreleasing the proc-\u003einner lock. This ensures the node remains alive\nwhile in use."
}
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"dateUpdated": "2026-05-11T20:54:43.394Z",
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"url": "https://git.kernel.org/stable/c/dc8aea47b928cc153b591b3558829ce42f685074"
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"title": "binder: fix node UAF in binder_add_freeze_work()",
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"cveId": "CVE-2024-56556",
"datePublished": "2024-12-27T14:23:02.556Z",
"dateReserved": "2024-12-27T14:03:05.991Z",
"dateUpdated": "2026-05-11T20:54:43.394Z",
"state": "PUBLISHED"
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"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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