CVE-2022-48814— 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net:dsa:seville模块需要使用devres为mdiobus分配和注册，或者完全不用devres。
可能的 ATT&CK 技术 1 AI
T1059 · Command and Scripting Interpreter影响版本矩阵 8
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | ac3a68d56651c3dad2c12c7afce065fe15267f44< 1d13e7221035947c62800c9d3d99b4ed570e27e7 |
affected |
ac3a68d56651c3dad2c12c7afce065fe15267f44< 0e816362d823cd46c666e64d8bffe329ee22f4cc |
affected | ||
ac3a68d56651c3dad2c12c7afce065fe15267f44< bd488afc3b39e045ba71aab472233f2a78726e7b |
affected | ||
5.9 |
affected | ||
< 5.9 |
unaffected | ||
5.15.27≤ 5.15.* |
unaffected | ||
5.16.10≤ 5.16.* |
unaffected | ||
5.17≤ * |
unaffected |
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一、 漏洞 CVE-2022-48814 基础信息
漏洞信息
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Vulnerability Title
net: dsa: seville: register the mdiobus under devres
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
net: dsa: seville: register the mdiobus under devres
As explained in commits:
74b6d7d13307 ("net: dsa: realtek: register the MDIO bus under devres")
5135e96a3dd2 ("net: dsa: don't allocate the slave_mii_bus using devres")
mdiobus_free() will panic when called from devm_mdiobus_free() <-
devres_release_all() <- __device_release_driver(), and that mdiobus was
not previously unregistered.
The Seville VSC9959 switch is a platform device, so the initial set of
constraints that I thought would cause this (I2C or SPI buses which call
->remove on ->shutdown) do not apply. But there is one more which
applies here.
If the DSA master itself is on a bus that calls ->remove from ->shutdown
(like dpaa2-eth, which is on the fsl-mc bus), there is a device link
between the switch and the DSA master, and device_links_unbind_consumers()
will unbind the seville switch driver on shutdown.
So the same treatment must be applied to all DSA switch drivers, which
is: either use devres for both the mdiobus allocation and registration,
or don't use devres at all.
The seville driver has a code structure that could accommodate both the
mdiobus_unregister and mdiobus_free calls, but it has an external
dependency upon mscc_miim_setup() from mdio-mscc-miim.c, which calls
devm_mdiobus_alloc_size() on its behalf. So rather than restructuring
that, and exporting yet one more symbol mscc_miim_teardown(), let's work
with devres and replace of_mdiobus_register with the devres variant.
When we use all-devres, we can ensure that devres doesn't free a
still-registered bus (it either runs both callbacks, or none).
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net:dsa:seville模块需要使用devres为mdiobus分配和注册，或者完全不用devres。
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-2022-48814 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2022-48814 其他参考 (2)
同批安全公告 · Linux · 2024-07-16 · 共 98 条
| CVE-2022-48790 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-48789 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-48788 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-48851 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-48829 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-48828 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-48864 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48830 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48782 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48785 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48786 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48839 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48779 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48821 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48822 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48816 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48792 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48796 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48787 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48791 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 98 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2022-48814
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