CVE-2025-38592— Linux kernel 安全漏洞
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。
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于Bluetooth: hci_devcd_dump模块在dev_coredumpv中可能导致越界访问。
可能的 ATT&CK 技术 1 AI
T1068 · Exploitation for Privilege Escalation影响版本矩阵 8
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | b257e02ecc46f8561d8bd88943164a10c9e90a80< efd55f6a59449f8d4e4953f12c177aa902b7451f |
affected |
b257e02ecc46f8561d8bd88943164a10c9e90a80< 8c021ad797f9171d015cf0a932a3fbe5232190f5 |
affected | ||
b257e02ecc46f8561d8bd88943164a10c9e90a80< 7af4d7b53502286c6cf946d397ab183e76d14820 |
affected | ||
6.15 |
affected | ||
< 6.15 |
unaffected | ||
6.15.10≤ 6.15.* |
unaffected | ||
6.16.1≤ 6.16.* |
unaffected | ||
6.17≤ * |
unaffected |
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一、 漏洞 CVE-2025-38592 基础信息
漏洞信息
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Vulnerability Title
Bluetooth: hci_devcd_dump: fix out-of-bounds via dev_coredumpv
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: hci_devcd_dump: fix out-of-bounds via dev_coredumpv
Currently both dev_coredumpv and skb_put_data in hci_devcd_dump use
hdev->dump.head. However, dev_coredumpv can free the buffer. From
dev_coredumpm_timeout documentation, which is used by dev_coredumpv:
> Creates a new device coredump for the given device. If a previous one hasn't
> been read yet, the new coredump is discarded. The data lifetime is determined
> by the device coredump framework and when it is no longer needed the @free
> function will be called to free the data.
If the data has not been read by the userspace yet, dev_coredumpv will
discard new buffer, freeing hdev->dump.head. This leads to
vmalloc-out-of-bounds error when skb_put_data tries to access
hdev->dump.head.
A crash report from syzbot illustrates this:
==================================================================
BUG: KASAN: vmalloc-out-of-bounds in skb_put_data
include/linux/skbuff.h:2752 [inline]
BUG: KASAN: vmalloc-out-of-bounds in hci_devcd_dump+0x142/0x240
net/bluetooth/coredump.c:258
Read of size 140 at addr ffffc90004ed5000 by task kworker/u9:2/5844
CPU: 1 UID: 0 PID: 5844 Comm: kworker/u9:2 Not tainted
6.14.0-syzkaller-10892-g4e82c87058f4 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 02/12/2025
Workqueue: hci0 hci_devcd_timeout
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xc3/0x670 mm/kasan/report.c:521
kasan_report+0xe0/0x110 mm/kasan/report.c:634
check_region_inline mm/kasan/generic.c:183 [inline]
kasan_check_range+0xef/0x1a0 mm/kasan/generic.c:189
__asan_memcpy+0x23/0x60 mm/kasan/shadow.c:105
skb_put_data include/linux/skbuff.h:2752 [inline]
hci_devcd_dump+0x142/0x240 net/bluetooth/coredump.c:258
hci_devcd_timeout+0xb5/0x2e0 net/bluetooth/coredump.c:413
process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
The buggy address ffffc90004ed5000 belongs to a vmalloc virtual mapping
Memory state around the buggy address:
ffffc90004ed4f00: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
ffffc90004ed4f80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
>ffffc90004ed5000: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
^
ffffc90004ed5080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
ffffc90004ed5100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
==================================================================
To avoid this issue, reorder dev_coredumpv to be called after
skb_put_data that does not free the data.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/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
Vulnerability Title
Linux kernel 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于Bluetooth: hci_devcd_dump模块在dev_coredumpv中可能导致越界访问。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2025-38592 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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同批安全公告 · Linux · 2025-08-19 · 共 59 条
| CVE-2025-38561 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-38566 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-38560 | 9.3 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-38601 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38600 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38599 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38608 | 8.6 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38574 | 8.6 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38571 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38595 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38598 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38607 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38614 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38615 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38604 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38593 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38586 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38582 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38580 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38579 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 59 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2025-38592
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