CVE-2022-48840— 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iavf模块中发现重启/关机时的挂起问题。在iavf_remove函数中添加的等待循环可能会导致重启或关机时的死循环。
可能的 ATT&CK 技术 1 AI
T1499.004 · Application or System Exploitation影响版本矩阵 5
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 85aa76066fef64de8a48d0da6b4071ceac455a94< 80974bb730270199c6fcb189af04d5945b87e813 |
affected |
7b9515172ab4d4c6ac0eae4b71013ee6ce932205< 4477b9a4193b35eb3a8afd2adf2d42add2f88d57 |
affected | ||
974578017fc1fdd06cea8afb9dfa32602e8529ed< b04683ff8f0823b869c219c78ba0d974bddea0b5 |
affected | ||
5.15.27< 5.15.31 |
affected | ||
5.16.13< 5.16.17 |
affected |
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一、 漏洞 CVE-2022-48840 基础信息
漏洞信息
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Vulnerability Title
iavf: Fix hang during reboot/shutdown
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
iavf: Fix hang during reboot/shutdown
Recent commit 974578017fc1 ("iavf: Add waiting so the port is
initialized in remove") adds a wait-loop at the beginning of
iavf_remove() to ensure that port initialization is finished
prior unregistering net device. This causes a regression
in reboot/shutdown scenario because in this case callback
iavf_shutdown() is called and this callback detaches the device,
makes it down if it is running and sets its state to __IAVF_REMOVE.
Later shutdown callback of associated PF driver (e.g. ice_shutdown)
is called. That callback calls among other things sriov_disable()
that calls indirectly iavf_remove() (see stack trace below).
As the adapter state is already __IAVF_REMOVE then the mentioned
loop is end-less and shutdown process hangs.
The patch fixes this by checking adapter's state at the beginning
of iavf_remove() and skips the rest of the function if the adapter
is already in remove state (shutdown is in progress).
Reproducer:
1. Create VF on PF driven by ice or i40e driver
2. Ensure that the VF is bound to iavf driver
3. Reboot
[52625.981294] sysrq: SysRq : Show Blocked State
[52625.988377] task:reboot state:D stack: 0 pid:17359 ppid: 1 f2
[52625.996732] Call Trace:
[52625.999187] __schedule+0x2d1/0x830
[52626.007400] schedule+0x35/0xa0
[52626.010545] schedule_hrtimeout_range_clock+0x83/0x100
[52626.020046] usleep_range+0x5b/0x80
[52626.023540] iavf_remove+0x63/0x5b0 [iavf]
[52626.027645] pci_device_remove+0x3b/0xc0
[52626.031572] device_release_driver_internal+0x103/0x1f0
[52626.036805] pci_stop_bus_device+0x72/0xa0
[52626.040904] pci_stop_and_remove_bus_device+0xe/0x20
[52626.045870] pci_iov_remove_virtfn+0xba/0x120
[52626.050232] sriov_disable+0x2f/0xe0
[52626.053813] ice_free_vfs+0x7c/0x340 [ice]
[52626.057946] ice_remove+0x220/0x240 [ice]
[52626.061967] ice_shutdown+0x16/0x50 [ice]
[52626.065987] pci_device_shutdown+0x34/0x60
[52626.070086] device_shutdown+0x165/0x1c5
[52626.074011] kernel_restart+0xe/0x30
[52626.077593] __do_sys_reboot+0x1d2/0x210
[52626.093815] do_syscall_64+0x5b/0x1a0
[52626.097483] entry_SYSCALL_64_after_hwframe+0x65/0xca
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iavf模块中发现重启/关机时的挂起问题。在iavf_remove函数中添加的等待循环可能会导致重启或关机时的死循环。
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-2022-48840 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2022-48840 其他参考 (3)
同批安全公告 · Linux · 2024-07-16 · 共 98 条
| CVE-2022-48788 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-48789 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-48851 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-48790 | 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-2022-48785 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48782 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48830 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48864 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48791 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48792 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48847 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48839 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48822 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48821 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48816 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48796 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48801 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-41008 | 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-2022-48840
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