CVE-2026-99011— Linux 蓝牙 SCO 竞态漏洞
一分钟漏洞结论
影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
在 Linux 内核中，以下漏洞已得到修复： 蓝牙 SCO 子系统：对 的生命周期与 进行序列化同步 函数在持有 锁的情况下，将 这个弱反向指针升级为强引用： 然而，该指针在另一侧被清除时并未持有此锁。当最后一个 引用被释放时， 会在未持有 的情况下执行： 这导致接收路径（RX path）可能读取到已被并发释放的 ，并对该 对象调用 ，从而引发内存使用后释放（use-after-free）问题： 仅能防止引用计数为零的情况，无法防止底层内存已被释放。 修复方案： 让 真正持有所指向 对象的引用，确保只要该指针仍被安
可能的 ATT&CK 技术 1 AI
T1190 · Exploit Public-Facing Application影响版本矩阵 8
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | e6720779ae612a14ac4ba7fe4fd5b27d900d932c< b108ea7ebba147465f4158d8133f0e8f013762ed |
affected |
e6720779ae612a14ac4ba7fe4fd5b27d900d932c< 8a98d58f6cfe70d51138cd9ce894e72671d95f8a |
affected | ||
e6720779ae612a14ac4ba7fe4fd5b27d900d932c< 816fb1590a4c8cf8d05cd076057616be02e276f0 |
affected | ||
6.13 |
affected | ||
< 6.13 |
unaffected | ||
6.18.57≤ 6.18.* |
unaffected | ||
7.2.11≤ 7.2.* |
unaffected | ||
7.3≤ * |
unaffected |
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一、 漏洞 CVE-2026-99011 基础信息
漏洞信息
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Vulnerability Title
Bluetooth: SCO: serialise sco_conn lifetime against sco_recv_scodata()
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: SCO: serialise sco_conn lifetime against sco_recv_scodata()
sco_recv_scodata() upgrades the weak hcon->sco_data back-pointer to a
strong reference under hdev->lock:
hci_dev_lock(hdev);
hcon = hci_conn_hash_lookup_handle(hdev, handle);
...
conn = sco_conn_hold_unless_zero(hcon->sco_data);
hci_dev_unlock(hdev);
but the pointer is cleared from the other side without that lock. When
the last sco_conn reference is dropped, sco_conn_free() ran
conn->hcon->sco_data = NULL;
with no hdev->lock held, so the RX path could read hcon->sco_data and
call kref_get_unless_zero() on an sco_conn that was concurrently freed:
BUG: KASAN: slab-use-after-free in sco_conn_hold_unless_zero+0xbe/0x160
Write of size 4 by task kworker/u17:0
Workqueue: hci0 hci_rx_work
Call Trace:
sco_conn_hold_unless_zero+0xbe/0x160
sco_recv_scodata+0x13f/0x490
hci_rx_work+0x3af/0x730
kref_get_unless_zero() only guards against a zero refcount, not against
the backing memory already being freed.
Give hcon->sco_data an actual reference on the sco_conn it points to, so
the object cannot be freed while the pointer is still installed, and only
clear and drop it from sco_conn_del(), which runs under hdev->lock (its
callers, sco_connect_cfm() and sco_disconn_cfm(), hold it). The reader in
sco_recv_scodata() also takes hdev->lock, so the store and the read are
now serialised: the RX path either observes NULL or a reference that is
guaranteed to stay valid until it drops its own.
sco_conn_add() no longer hands its kref_init() reference to the caller as
the connection's only reference; that initial reference is the one owned
by hcon->sco_data, and callers get their own via sco_conn_hold().
Because the sco_conn can now outlive the socket (the association keeps it
alive until the link goes down), the hci_conn can no longer be dropped
from sco_conn_free() without regressing socket close: closing a connected
SCO socket must still tear the link down. Move hci_conn ownership to the
socket instead: __sco_chan_add() takes an hci_conn reference and it is
released from sco_chan_del() and sco_sock_destruct(), exactly once. The
sco_conn no longer owns an hci_conn reference, so sco_conn_add() stops
consuming one and sco_connect() drops the hci_connect_sco() reference on
every path; sco_connect_cfm() no longer needs its hci_conn_hold() dance.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-99011 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-99011 补丁与修复 (3)
同批安全公告 · Linux · 2026-10-23 · 共 217 条
| CVE-2026-98959 | 9.8 CRITICAL | btrfs 扩展属性替换处理远程代码执行漏洞 |
| CVE-2026-99078 | 9.8 CRITICAL | Mellanox mlx5e MPWQE重试时XSK缓冲区释放漏洞 |
| CVE-2026-99079 | 9.8 CRITICAL | Mellanox mlx5e 驱动 XSK 缓冲区释放漏洞 |
| CVE-2026-98988 | 8.8 HIGH | Linux 5.13 命名空间越界漏洞 |
| CVE-2026-99083 | 8.8 HIGH | ksmbd 的 krb5_authenticate() 函数堆越界写漏洞 |
| CVE-2026-99082 | 8.8 HIGH | KVM x86 内存管理漏洞 |
| CVE-2026-98870 | 8.8 HIGH | ksmbd 会话清理时存在通道移除逻辑漏洞 |
| CVE-2026-98980 | 8.8 HIGH | namei 遍历中过度挂载条目信息泄露漏洞 |
| CVE-2026-98981 | 8.8 HIGH | Linux 内核命名空间 dentry 解挂载前未哈希漏洞 |
| CVE-2026-99042 | 8.4 HIGH | io_uring 24 字节 sockaddr_in6 过滤字段填充漏洞 |
| CVE-2026-98978 | 8.4 HIGH | Linux 命名空间 锁定挂载永不失效漏洞 |
| CVE-2026-99064 | 8.1 HIGH | CIPSO 缓存选项偏移调整漏洞 |
| CVE-2026-98968 | 8.1 HIGH | AMT 中继通用查询远程代码执行漏洞 |
| CVE-2026-98899 | 7.8 HIGH | Linux netfilter ipset 竞态条件漏洞 |
| CVE-2026-99012 | 7.8 HIGH | Linux 蓝牙 ISO 并发连接序列化漏洞 |
| CVE-2026-99016 | 7.8 HIGH | RISC-V futex 用户指针未去标签原子访问漏洞 |
| CVE-2026-99002 | 7.8 HIGH | vmwgfx 驱动用户空间 pitch 参数验证漏洞 |
| CVE-2026-99013 | 7.8 HIGH | Linux 蓝牙 ISO 并发 BIS 监听器拒绝漏洞 |
| CVE-2026-98999 | 7.8 HIGH | Intel Xe DRM 驱动程序链接表项失效漏洞 |
| CVE-2026-99032 | 7.8 HIGH | Linux 内核 SMC 模块 信息泄露漏洞 |
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