CVE-2025-37772— 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RDMA/cma中cma_netevent_work_handler工作队列崩溃。
影响版本矩阵 12
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 925d046e7e52c71c3531199ce137e141807ef740< 51003b2c872c63d28bcf5fbcc52cf7b05615f7b7 |
affected |
925d046e7e52c71c3531199ce137e141807ef740< c2b169fc7a12665d8a675c1ff14bca1b9c63fb9a |
affected | ||
925d046e7e52c71c3531199ce137e141807ef740< d23fd7a539ac078df119707110686a5b226ee3bb |
affected | ||
925d046e7e52c71c3531199ce137e141807ef740< b172a4a0de254f1fcce7591833a9a63547c2f447 |
affected | ||
925d046e7e52c71c3531199ce137e141807ef740< 45f5dcdd049719fb999393b30679605f16ebce14 |
affected | ||
6.0 |
affected | ||
< 6.0 |
unaffected | ||
6.1.135≤ 6.1.* |
unaffected | ||
| … +4 条更多 | |||
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一、 漏洞 CVE-2025-37772 基础信息
漏洞信息
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Vulnerability Title
RDMA/cma: Fix workqueue crash in cma_netevent_work_handler
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
RDMA/cma: Fix workqueue crash in cma_netevent_work_handler
struct rdma_cm_id has member "struct work_struct net_work"
that is reused for enqueuing cma_netevent_work_handler()s
onto cma_wq.
Below crash[1] can occur if more than one call to
cma_netevent_callback() occurs in quick succession,
which further enqueues cma_netevent_work_handler()s for the
same rdma_cm_id, overwriting any previously queued work-item(s)
that was just scheduled to run i.e. there is no guarantee
the queued work item may run between two successive calls
to cma_netevent_callback() and the 2nd INIT_WORK would overwrite
the 1st work item (for the same rdma_cm_id), despite grabbing
id_table_lock during enqueue.
Also drgn analysis [2] indicates the work item was likely overwritten.
Fix this by moving the INIT_WORK() to __rdma_create_id(),
so that it doesn't race with any existing queue_work() or
its worker thread.
[1] Trimmed crash stack:
=============================================
BUG: kernel NULL pointer dereference, address: 0000000000000008
kworker/u256:6 ... 6.12.0-0...
Workqueue: cma_netevent_work_handler [rdma_cm] (rdma_cm)
RIP: 0010:process_one_work+0xba/0x31a
Call Trace:
worker_thread+0x266/0x3a0
kthread+0xcf/0x100
ret_from_fork+0x31/0x50
ret_from_fork_asm+0x1a/0x30
=============================================
[2] drgn crash analysis:
>>> trace = prog.crashed_thread().stack_trace()
>>> trace
(0) crash_setup_regs (./arch/x86/include/asm/kexec.h:111:15)
(1) __crash_kexec (kernel/crash_core.c:122:4)
(2) panic (kernel/panic.c:399:3)
(3) oops_end (arch/x86/kernel/dumpstack.c:382:3)
...
(8) process_one_work (kernel/workqueue.c:3168:2)
(9) process_scheduled_works (kernel/workqueue.c:3310:3)
(10) worker_thread (kernel/workqueue.c:3391:4)
(11) kthread (kernel/kthread.c:389:9)
Line workqueue.c:3168 for this kernel version is in process_one_work():
3168 strscpy(worker->desc, pwq->wq->name, WORKER_DESC_LEN);
>>> trace[8]["work"]
*(struct work_struct *)0xffff92577d0a21d8 = {
.data = (atomic_long_t){
.counter = (s64)536870912, <=== Note
},
.entry = (struct list_head){
.next = (struct list_head *)0xffff924d075924c0,
.prev = (struct list_head *)0xffff924d075924c0,
},
.func = (work_func_t)cma_netevent_work_handler+0x0 = 0xffffffffc2cec280,
}
Suspicion is that pwq is NULL:
>>> trace[8]["pwq"]
(struct pool_workqueue *)<absent>
In process_one_work(), pwq is assigned from:
struct pool_workqueue *pwq = get_work_pwq(work);
and get_work_pwq() is:
static struct pool_workqueue *get_work_pwq(struct work_struct *work)
{
unsigned long data = atomic_long_read(&work->data);
if (data & WORK_STRUCT_PWQ)
return work_struct_pwq(data);
else
return NULL;
}
WORK_STRUCT_PWQ is 0x4:
>>> print(repr(prog['WORK_STRUCT_PWQ']))
Object(prog, 'enum work_flags', value=4)
But work->data is 536870912 which is 0x20000000.
So, get_work_pwq() returns NULL and we crash in process_one_work():
3168 strscpy(worker->desc, pwq->wq->name, WORKER_DESC_LEN);
=============================================
来源: CVE Program / CVE List V5
CVSS Information
N/A
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RDMA/cma中cma_netevent_work_handler工作队列崩溃。
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-2025-37772 的公开POC
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|---|
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CVE-2025-37772 补丁与修复 (5)
同批安全公告 · Linux · 2025-05-01 · 共 245 条
| CVE-2025-37750 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-37778 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-49770 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-49931 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37776 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37777 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37790 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49910 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49886 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-23159 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37749 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37765 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37779 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49920 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49919 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49921 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37752 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37756 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37761 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49804 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 245 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2025-37772
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