CVE-2022-48868— 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 dmaengine/idxd 组件在工作队列无法启用时应该失败。
可能的 ATT&CK 技术 1 AI
T1190 · Exploit Public-Facing Application影响版本矩阵 8
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 1f2bb40337f0df1d9af80793e9fdacff7706e654< 0f150134dd795ffcd60b798a85ab737d8d010fb7 |
affected |
1f2bb40337f0df1d9af80793e9fdacff7706e654< 99dc4520b74e7ca8e9dc9abe37a0b10b49467960 |
affected | ||
1f2bb40337f0df1d9af80793e9fdacff7706e654< b51b75f0604f17c0f6f3b6f68f1a521a5cc6b04f |
affected | ||
5.15 |
affected | ||
< 5.15 |
unaffected | ||
5.15.90≤ 5.15.* |
unaffected | ||
6.1.8≤ 6.1.* |
unaffected | ||
6.2≤ * |
unaffected |
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一、 漏洞 CVE-2022-48868 基础信息
漏洞信息
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Vulnerability Title
dmaengine: idxd: Let probe fail when workqueue cannot be enabled
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
dmaengine: idxd: Let probe fail when workqueue cannot be enabled
The workqueue is enabled when the appropriate driver is loaded and
disabled when the driver is removed. When the driver is removed it
assumes that the workqueue was enabled successfully and proceeds to
free allocations made during workqueue enabling.
Failure during workqueue enabling does not prevent the driver from
being loaded. This is because the error path within drv_enable_wq()
returns success unless a second failure is encountered
during the error path. By returning success it is possible to load
the driver even if the workqueue cannot be enabled and
allocations that do not exist are attempted to be freed during
driver remove.
Some examples of problematic flows:
(a)
idxd_dmaengine_drv_probe() -> drv_enable_wq() -> idxd_wq_request_irq():
In above flow, if idxd_wq_request_irq() fails then
idxd_wq_unmap_portal() is called on error exit path, but
drv_enable_wq() returns 0 because idxd_wq_disable() succeeds. The
driver is thus loaded successfully.
idxd_dmaengine_drv_remove()->drv_disable_wq()->idxd_wq_unmap_portal()
Above flow on driver unload triggers the WARN in devm_iounmap() because
the device resource has already been removed during error path of
drv_enable_wq().
(b)
idxd_dmaengine_drv_probe() -> drv_enable_wq() -> idxd_wq_request_irq():
In above flow, if idxd_wq_request_irq() fails then
idxd_wq_init_percpu_ref() is never called to initialize the percpu
counter, yet the driver loads successfully because drv_enable_wq()
returns 0.
idxd_dmaengine_drv_remove()->__idxd_wq_quiesce()->percpu_ref_kill():
Above flow on driver unload triggers a BUG when attempting to drop the
initial ref of the uninitialized percpu ref:
BUG: kernel NULL pointer dereference, address: 0000000000000010
Fix the drv_enable_wq() error path by returning the original error that
indicates failure of workqueue enabling. This ensures that the probe
fails when an error is encountered and the driver remove paths are only
attempted when the workqueue was enabled successfully.
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 dmaengine/idxd 组件在工作队列无法启用时应该失败。
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-2022-48868 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2022-48868 其他参考 (3)
同批安全公告 · Linux · 2024-08-21 · 共 68 条
| CVE-2023-52910 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-43881 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48871 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-43878 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48883 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-43877 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48892 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-43882 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-43880 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52913 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48899 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48872 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48873 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48874 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52903 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48878 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48887 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52907 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-43872 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52909 | 7.5 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 68 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2022-48868
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