CVE-2022-50550— 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blk-iolatency在add_disk失败时未正确清理内存，可能导致内存泄漏。
影响版本矩阵 8
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | d70675121546c35feaceebf7ed9caed8716640f3< 2a126e1db5553ce4498290df019866952f858954 |
affected |
d70675121546c35feaceebf7ed9caed8716640f3< 215f9437dda09531bcb80605298a24219f01cec5 |
affected | ||
d70675121546c35feaceebf7ed9caed8716640f3< 813e693023ba10da9e75067780f8378465bf27cc |
affected | ||
4.19 |
affected | ||
< 4.19 |
unaffected | ||
6.0.17≤ 6.0.* |
unaffected | ||
6.1.2≤ 6.1.* |
unaffected | ||
6.2≤ * |
unaffected |
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一、 漏洞 CVE-2022-50550 基础信息
漏洞信息
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Vulnerability Title
blk-iolatency: Fix memory leak on add_disk() failures
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
blk-iolatency: Fix memory leak on add_disk() failures
When a gendisk is successfully initialized but add_disk() fails such as when
a loop device has invalid number of minor device numbers specified,
blkcg_init_disk() is called during init and then blkcg_exit_disk() during
error handling. Unfortunately, iolatency gets initialized in the former but
doesn't get cleaned up in the latter.
This is because, in non-error cases, the cleanup is performed by
del_gendisk() calling rq_qos_exit(), the assumption being that rq_qos
policies, iolatency being one of them, can only be activated once the disk
is fully registered and visible. That assumption is true for wbt and iocost,
but not so for iolatency as it gets initialized before add_disk() is called.
It is desirable to lazy-init rq_qos policies because they are optional
features and add to hot path overhead once initialized - each IO has to walk
all the registered rq_qos policies. So, we want to switch iolatency to lazy
init too. However, that's a bigger change. As a fix for the immediate
problem, let's just add an extra call to rq_qos_exit() in blkcg_exit_disk().
This is safe because duplicate calls to rq_qos_exit() become noop's.
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blk-iolatency在add_disk失败时未正确清理内存，可能导致内存泄漏。
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-2022-50550 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2022-50550 补丁与修复 (3)
同批安全公告 · Linux · 2025-10-07 · 共 118 条
| CVE-2023-53629 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2023-53630 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53676 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53675 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53673 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53679 | 8.3 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53635 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-50555 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53659 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53619 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53660 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53643 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53645 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53646 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53669 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53626 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53627 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-50528 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53683 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-50518 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 118 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2022-50550
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