一、漏洞信息

漏洞编号：[CVE-2022-50093](https://nvd.nist.gov/vuln/detail/CVE-2022-50093)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0

CVSS V3.0分值：

BaseScore：N/A None

Vector：CVSS：3.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:iommu/vt-d: avoid invalid memory access via node_online(NUMA_NO_NODE)KASAN reports:[ 4.668325][ T0] BUG: KASAN: wild-memory-access in dmar_parse_one_rhsa (arch/x86/include/asm/bitops.h:214 arch/x86/include/asm/bitops.h:226 include/asm-generic/bitops/instrumented-non-atomic.h:142 include/linux/nodemask.h:415 drivers/iommu/intel/dmar.c:497)[ 4.676149][ T0] Read of size 8 at addr 1fffffff85115558 by task swapper/0/0[ 4.683454][ T0][ 4.685638][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.19.0-rc3-00004-g0e862838f290 #1[ 4.694331][ T0] Hardware name: Supermicro SYS-5018D-FN4T/X10SDV-8C-TLN4F, BIOS 1.1 03/02/2016[ 4.703196][ T0] Call Trace:[ 4.706334][ T0] <TASK>[ 4.709133][ T0] ? dmar_parse_one_rhsa (arch/x86/include/asm/bitops.h:214 arch/x86/include/asm/bitops.h:226 include/asm-generic/bitops/instrumented-non-atomic.h:142 include/linux/nodemask.h:415 drivers/iommu/intel/dmar.c:497)after converting the type of the first argument (@nr, bit number)of arch_test_bit() from `long` to `unsigned long`[0].Under certain conditions (for example, when ACPI NUMA is disabledvia command line), pxm_to_node() can return %NUMA_NO_NODE (-1).It is valid magic number of NUMA node, but not valid bit numberto use in bitops.node_online() eventually descends to test_bit() without checkingfor the input, assuming it s on caller side (which might be goodfor perf-critical tasks). There, -1 becomes %ULONG_MAX which leadsto an insane array index when calculating bit position in memory.For now, add an explicit check for @node being not %NUMA_NO_NODEbefore calling test_bit(). The actual logics didn t change hereat all.[0] https://github.com/norov/linux/commit/0e862838f290147ea9c16db852d8d494b552d38d

漏洞公开时间：2025-06-18 19:15:38

漏洞创建时间：2025-06-19 11:51:12

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2022-50093

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| | https://git.kernel.org/stable/c/0b4c0003aeda32a600f95df53b2848da8a5aa3fa | |

| | https://git.kernel.org/stable/c/5659efdadf04b56707d58c1b758df16d2e0eff2c | |

| | https://git.kernel.org/stable/c/73ce2046e04ad488cecc66757c36cbe1bdf089d4 | |

| | https://git.kernel.org/stable/c/b0b0b77ea611e3088e9523e60860f4f41b62b235 | |

| | https://git.kernel.org/stable/c/b12304984654d8e58a2b22ff94c4410906d6267f | |

| | https://git.kernel.org/stable/c/c2304c50f4d94f56c2e326f25c9dc8cf2ba6f5fa | |

| | | https://git.kernel.org/stable/c/0b4c0003aeda32a600f95df53b2848da8a5aa3fa | | nvd |

| | | https://git.kernel.org/stable/c/5659efdadf04b56707d58c1b758df16d2e0eff2c | | nvd |

| | | https://git.kernel.org/stable/c/73ce2046e04ad488cecc66757c36cbe1bdf089d4 | | nvd |

| | | https://git.kernel.org/stable/c/b0b0b77ea611e3088e9523e60860f4f41b62b235 | | nvd |

| | | https://git.kernel.org/stable/c/b12304984654d8e58a2b22ff94c4410906d6267f | | nvd |

| | | https://git.kernel.org/stable/c/c2304c50f4d94f56c2e326f25c9dc8cf2ba6f5fa | | nvd |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

受影响版本排查(受影响/不受影响)：

1.master(6.12.0):

2.openEuler-20.03-LTS-SP4(4.19.90):

3.openEuler-22.03-LTS-SP3(5.10.0):

4.openEuler-22.03-LTS-SP4(5.10.0):

5.openEuler-24.03-LTS(6.6.0):

6.openEuler-24.03-LTS-Next(6.6.0):

7.openEuler-24.03-LTS-SP1(6.6.0):

8.openEuler-24.03-LTS-SP2(6.6.0):

修复是否涉及abi变化(是/否)：

1.master(6.12.0):

2.openEuler-20.03-LTS-SP4(4.19.90):

3.openEuler-22.03-LTS-SP3(5.10.0):

4.openEuler-22.03-LTS-SP4(5.10.0):

5.openEuler-24.03-LTS(6.6.0):

6.openEuler-24.03-LTS-Next(6.6.0):

7.openEuler-24.03-LTS-SP1(6.6.0):

8.openEuler-24.03-LTS-SP2(6.6.0):

原因说明：

1.master(6.12.0):

2.openEuler-20.03-LTS-SP4(4.19.90):

3.openEuler-22.03-LTS-SP3(5.10.0):

4.openEuler-22.03-LTS-SP4(5.10.0):

5.openEuler-24.03-LTS(6.6.0):

6.openEuler-24.03-LTS-Next(6.6.0):

7.openEuler-24.03-LTS-SP1(6.6.0):

8.openEuler-24.03-LTS-SP2(6.6.0):