CVE-2022-48760— 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 USB:core 模块通过添加内存屏障修复 usb_kill_urb 中的挂起。
影响版本矩阵 20
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 49367d8f1d9f26482cf7089489e90f0afd0a942c< 5f138ef224dffd15d5e5c5b095859719e0038427 |
affected |
49367d8f1d9f26482cf7089489e90f0afd0a942c< b50f5ca60475710bbc9a3af32fbfc17b1e69c2f0 |
affected | ||
49367d8f1d9f26482cf7089489e90f0afd0a942c< 546ba238535d925254e0b3f12012a5c55801e2f3 |
affected | ||
49367d8f1d9f26482cf7089489e90f0afd0a942c< 5904dfd3ddaff3bf4a41c3baf0a8e8f31ed4599b |
affected | ||
49367d8f1d9f26482cf7089489e90f0afd0a942c< 9c61fce322ac2ef7fecf025285353570d60e41d6 |
affected | ||
49367d8f1d9f26482cf7089489e90f0afd0a942c< e3b131e30e612ff0e32de6c1cb4f69f89db29193 |
affected | ||
49367d8f1d9f26482cf7089489e90f0afd0a942c< 9340226388c66a7e090ebb00e91ed64a753b6c26 |
affected | ||
49367d8f1d9f26482cf7089489e90f0afd0a942c< c9a18f7c5b071dce5e6939568829d40994866ab0 |
affected | ||
| … +12 条更多 | |||
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一、 漏洞 CVE-2022-48760 基础信息
漏洞信息
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Vulnerability Title
USB: core: Fix hang in usb_kill_urb by adding memory barriers
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
USB: core: Fix hang in usb_kill_urb by adding memory barriers
The syzbot fuzzer has identified a bug in which processes hang waiting
for usb_kill_urb() to return. It turns out the issue is not unlinking
the URB; that works just fine. Rather, the problem arises when the
wakeup notification that the URB has completed is not received.
The reason is memory-access ordering on SMP systems. In outline form,
usb_kill_urb() and __usb_hcd_giveback_urb() operating concurrently on
different CPUs perform the following actions:
CPU 0 CPU 1
---------------------------- ---------------------------------
usb_kill_urb(): __usb_hcd_giveback_urb():
... ...
atomic_inc(&urb->reject); atomic_dec(&urb->use_count);
... ...
wait_event(usb_kill_urb_queue,
atomic_read(&urb->use_count) == 0);
if (atomic_read(&urb->reject))
wake_up(&usb_kill_urb_queue);
Confining your attention to urb->reject and urb->use_count, you can
see that the overall pattern of accesses on CPU 0 is:
write urb->reject, then read urb->use_count;
whereas the overall pattern of accesses on CPU 1 is:
write urb->use_count, then read urb->reject.
This pattern is referred to in memory-model circles as SB (for "Store
Buffering"), and it is well known that without suitable enforcement of
the desired order of accesses -- in the form of memory barriers -- it
is entirely possible for one or both CPUs to execute their reads ahead
of their writes. The end result will be that sometimes CPU 0 sees the
old un-decremented value of urb->use_count while CPU 1 sees the old
un-incremented value of urb->reject. Consequently CPU 0 ends up on
the wait queue and never gets woken up, leading to the observed hang
in usb_kill_urb().
The same pattern of accesses occurs in usb_poison_urb() and the
failure pathway of usb_hcd_submit_urb().
The problem is fixed by adding suitable memory barriers. To provide
proper memory-access ordering in the SB pattern, a full barrier is
required on both CPUs. The atomic_inc() and atomic_dec() accesses
themselves don't provide any memory ordering, but since they are
present, we can use the optimized smp_mb__after_atomic() memory
barrier in the various routines to obtain the desired effect.
This patch adds the necessary memory barriers.
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 USB:core 模块通过添加内存屏障修复 usb_kill_urb 中的挂起。
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-2022-48760 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2022-48760 其他参考 (9)
同批安全公告 · Linux · 2024-06-20 · 共 67 条
| CVE-2022-48711 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-38620 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47620 | 8.1 HIGH | Linux kernel安全漏洞 |
| CVE-2022-48743 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48720 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48751 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48771 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48716 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48733 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48729 | 7.8 HIGH | Linux kernel安全漏洞 |
| CVE-2022-48759 | 7.8 HIGH | Linux kernel安全漏洞 |
| CVE-2022-48742 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48721 | 7.8 HIGH | Linux kernel安全漏洞 |
| CVE-2022-48754 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48762 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48735 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48726 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48744 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48727 | 7.3 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48717 | 7.1 HIGH | Linux kernel 安全漏洞 |
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IV. Related Vulnerabilities
V. Comments for CVE-2022-48760
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