CVE-2022-50774— 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DMA传输方向设置不当，可能导致重叠映射错误。
影响版本矩阵 12
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | d370cec3219490656d72f5ae6e5df32c113c5a44< 426d5bc089e7731e36b514d1beca19e777a2d653 |
affected |
d370cec3219490656d72f5ae6e5df32c113c5a44< 1f1ab76e251521bd2fa5244473efcf663792745d |
affected | ||
d370cec3219490656d72f5ae6e5df32c113c5a44< 429348d4f675e9eb418d0829064c4d7d06bd66a3 |
affected | ||
d370cec3219490656d72f5ae6e5df32c113c5a44< c4c9d9edf4848aed89516b23b88950b194beff6a |
affected | ||
d370cec3219490656d72f5ae6e5df32c113c5a44< cf5bb835b7c8a5fee7f26455099cca7feb57f5e9 |
affected | ||
3.17 |
affected | ||
< 3.17 |
unaffected | ||
5.10.150≤ 5.10.* |
unaffected | ||
| … +4 条更多 | |||
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一、 漏洞 CVE-2022-50774 基础信息
漏洞信息
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Vulnerability Title
crypto: qat - fix DMA transfer direction
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
crypto: qat - fix DMA transfer direction
When CONFIG_DMA_API_DEBUG is selected, while running the crypto self
test on the QAT crypto algorithms, the function add_dma_entry() reports
a warning similar to the one below, saying that overlapping mappings
are not supported. This occurs in tests where the input and the output
scatter list point to the same buffers (i.e. two different scatter lists
which point to the same chunks of memory).
The logic that implements the mapping uses the flag DMA_BIDIRECTIONAL
for both the input and the output scatter lists which leads to
overlapped write mappings. These are not supported by the DMA layer.
Fix by specifying the correct DMA transfer directions when mapping
buffers. For in-place operations where the input scatter list
matches the output scatter list, buffers are mapped once with
DMA_BIDIRECTIONAL, otherwise input buffers are mapped using the flag
DMA_TO_DEVICE and output buffers are mapped with DMA_FROM_DEVICE.
Overlapping a read mapping with a write mapping is a valid case in
dma-coherent devices like QAT.
The function that frees and unmaps the buffers, qat_alg_free_bufl()
has been changed accordingly to the changes to the mapping function.
DMA-API: 4xxx 0000:06:00.0: cacheline tracking EEXIST, overlapping mappings aren't supported
WARNING: CPU: 53 PID: 4362 at kernel/dma/debug.c:570 add_dma_entry+0x1e9/0x270
...
Call Trace:
dma_map_page_attrs+0x82/0x2d0
? preempt_count_add+0x6a/0xa0
qat_alg_sgl_to_bufl+0x45b/0x990 [intel_qat]
qat_alg_aead_dec+0x71/0x250 [intel_qat]
crypto_aead_decrypt+0x3d/0x70
test_aead_vec_cfg+0x649/0x810
? number+0x310/0x3a0
? vsnprintf+0x2a3/0x550
? scnprintf+0x42/0x70
? valid_sg_divisions.constprop.0+0x86/0xa0
? test_aead_vec+0xdf/0x120
test_aead_vec+0xdf/0x120
alg_test_aead+0x185/0x400
alg_test+0x3d8/0x500
? crypto_acomp_scomp_free_ctx+0x30/0x30
? __schedule+0x32a/0x12a0
? ttwu_queue_wakelist+0xbf/0x110
? _raw_spin_unlock_irqrestore+0x23/0x40
? try_to_wake_up+0x83/0x570
? _raw_spin_unlock_irqrestore+0x23/0x40
? __set_cpus_allowed_ptr_locked+0xea/0x1b0
? crypto_acomp_scomp_free_ctx+0x30/0x30
cryptomgr_test+0x27/0x50
kthread+0xe6/0x110
? kthread_complete_and_exit+0x20/0x20
ret_from_fork+0x1f/0x30
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DMA传输方向设置不当，可能导致重叠映射错误。
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-2022-50774 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2022-50774 其他参考 (2)
同批安全公告 · Linux · 2025-12-24 · 共 322 条
| CVE-2025-68741 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2023-53867 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-68726 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-68745 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2023-54094 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2023-54090 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2023-54076 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-50717 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-68359 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2023-53996 | 9.3 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2023-54071 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-54120 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-54043 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-50732 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-54092 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-54060 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68736 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-54040 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53986 | 8.6 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-50746 | 8.4 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 322 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2022-50774
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