CVE-2022-50002

一、漏洞信息
 漏洞编号：[CVE-2022-50002](https://nvd.nist.gov/vuln/detail/CVE-2022-50002)
 漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)
 漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.19,6.4.0,6.6.0
 CVSS V3.0分值：
  BaseScore：5.5 Medium
  Vector：CVSS：3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
 漏洞简述：
  In the Linux kernel, the following vulnerability has been resolved:net/mlx5: LAG, fix logic over MLX5_LAG_FLAG_NDEVS_READYOnly set MLX5_LAG_FLAG_NDEVS_READY if both netdevices are registered.Doing so guarantees that both ldev->pf[MLX5_LAG_P0].dev andldev->pf[MLX5_LAG_P1].dev have valid pointers whenMLX5_LAG_FLAG_NDEVS_READY is set.The core issue is asymmetry in setting MLX5_LAG_FLAG_NDEVS_READY andclearing it. Setting it is done wrongly when bothldev->pf[MLX5_LAG_P0].dev and ldev->pf[MLX5_LAG_P1].dev are set;clearing it is done right when either of ldev->pf[i].netdev is cleared.Consider the following scenario:1. PF0 loads and sets ldev->pf[MLX5_LAG_P0].dev to a valid pointer2. PF1 loads and sets both ldev->pf[MLX5_LAG_P1].dev and   ldev->pf[MLX5_LAG_P1].netdev with valid pointers. This results in   MLX5_LAG_FLAG_NDEVS_READY is set.3. PF0 is unloaded before setting dev->pf[MLX5_LAG_P0].netdev.   MLX5_LAG_FLAG_NDEVS_READY remains set.Further execution of mlx5_do_bond() will result in null pointerdereference when calling mlx5_lag_is_multipath()This patch fixes the following call trace actually encountered:[ 1293.475195] BUG: kernel NULL pointer dereference, address: 00000000000009a8[ 1293.478756] #PF: supervisor read access in kernel mode[ 1293.481320] #PF: error_code(0x0000) - not-present page[ 1293.483686] PGD 0 P4D 0[ 1293.484434] Oops: 0000 [#1] SMP PTI[ 1293.485377] CPU: 1 PID: 23690 Comm: kworker/u16:2 Not tainted 5.18.0-rc5_for_upstream_min_debug_2022_05_05_10_13 #1[ 1293.488039] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014[ 1293.490836] Workqueue: mlx5_lag mlx5_do_bond_work [mlx5_core][ 1293.492448] RIP: 0010:mlx5_lag_is_multipath+0x5/0x50 [mlx5_core][ 1293.494044] Code: e8 70 40 ff e0 48 8b 14 24 48 83 05 5c 1a 1b 00 01 e9 19 ff ff ff 48 83 05 47 1a 1b 00 01 eb d7 0f 1f 44 00 00 0f 1f 44 00 00 <48> 8b 87 a8 09 00 00 48 85 c0 74 26 48 83 05 a7 1b 1b 00 01 41 b8[ 1293.498673] RSP: 0018:ffff88811b2fbe40 EFLAGS: 00010202[ 1293.500152] RAX: ffff88818a94e1c0 RBX: ffff888165eca6c0 RCX: 0000000000000000[ 1293.501841] RDX: 0000000000000001 RSI: ffff88818a94e1c0 RDI: 0000000000000000[ 1293.503585] RBP: 0000000000000000 R08: ffff888119886740 R09: ffff888165eca73c[ 1293.505286] R10: 0000000000000018 R11: 0000000000000018 R12: ffff88818a94e1c0[ 1293.506979] R13: ffff888112729800 R14: 0000000000000000 R15: ffff888112729858[ 1293.508753] FS:  0000000000000000(0000) GS:ffff88852cc40000(0000) knlGS:0000000000000000[ 1293.510782] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033[ 1293.512265] CR2: 00000000000009a8 CR3: 00000001032d4002 CR4: 0000000000370ea0[ 1293.514001] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000[ 1293.515806] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
 漏洞公开时间：2025-06-18 19:15:28
 漏洞创建时间：2025-06-19 10:18:17
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2022-50002
<details>
<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |
| ------- | -------- | -------- |
|  | https://nvd.nist.gov/vuln/detail/CVE-2022-50002 |  |
|  | https://git.kernel.org/stable/c/4c040acf5744e87a7b3490f9ec8bedd0d15c9f29 |  |
|  | https://lore.kernel.org/linux-cve-announce/2025061828-CVE-2022-50002-9e5f@gregkh/T |  |
|  | https://vigilance.fr/vulnerability/Linux-kernel-multiple-vulnerabilities-dated-18-06-2025-47466 |  |
|  | https://www.cve.org/CVERecord?id=CVE-2022-50002 |  |
|  | https://bugzilla.redhat.com/show_bug.cgi?id=2373471 |  |
|  | https://git.kernel.org/stable/c/a6e675a66175869b7d87c0e1dd0ddf93e04f8098 |  |

</details>

漏洞分析指导链接：
  https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md
 漏洞数据来源:
  七彩瞬析开源风险感知平台
 漏洞补丁信息：
  <details>
<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源  |
| ------- | -------- | ------- | -------- | --------- |
| gregkh/linux |  | https://github.com/gregkh/linux/commit/4c040acf5744e87a7b3490f9ec8bedd0d15c9f29.patch |  | ljqc |
|  |  | https://git.kernel.org/stable/c/4c040acf5744e87a7b3490f9ec8bedd0d15c9f29 |  | nvd |
|  |  | https://git.kernel.org/stable/c/a6e675a66175869b7d87c0e1dd0ddf93e04f8098 |  | nvd |

</details>

二、漏洞分析结构反馈
 影响性分析说明：
                            In the Linux kernel, the following vulnerability has been resolved:net/mlx5: LAG, fix logic over MLX5_LAG_FLAG_NDEVS_READYOnly set MLX5_LAG_FLAG_NDEVS_READY if both netdevices are registered.Doing so guarantees that both ldev-&gt;pf[MLX5_LAG_P0].dev andldev-&gt;pf[MLX5_LAG_P1].dev have valid pointers whenMLX5_LAG_FLAG_NDEVS_READY is set.The core issue is asymmetry in setting MLX5_LAG_FLAG_NDEVS_READY andclearing it. Setting it is done wrongly when bothldev-&gt;pf[MLX5_LAG_P0].dev and ldev-&gt;pf[MLX5_LAG_P1].dev are set;clearing it is done right when either of ldev-&gt;pf[i].netdev is cleared.Consider the following scenario:1. PF0 loads and sets ldev-&gt;pf[MLX5_LAG_P0].dev to a valid pointer2. PF1 loads and sets both ldev-&gt;pf[MLX5_LAG_P1].dev and   ldev-&gt;pf[MLX5_LAG_P1].netdev with valid pointers. This results in   MLX5_LAG_FLAG_NDEVS_READY is set.3. PF0 is unloaded before setting dev-&gt;pf[MLX5_LAG_P0].netdev.   MLX5_LAG_FLAG_NDEVS_READY remains set.Further execution of mlx5_do_bond() will result in null pointerdereference when calling mlx5_lag_is_multipath()This patch fixes the following call trace actually encountered:[ 1293.475195] BUG: kernel NULL pointer dereference, address: 00000000000009a8[ 1293.478756] #PF: supervisor read access in kernel mode[ 1293.481320] #PF: error_code(0x0000) - not-present page[ 1293.483686] PGD 0 P4D 0[ 1293.484434] Oops: 0000 [#1] SMP PTI[ 1293.485377] CPU: 1 PID: 23690 Comm: kworker/u16:2 Not tainted 5.18.0-rc5_for_upstream_min_debug_2022_05_05_10_13 #1[ 1293.488039] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014[ 1293.490836] Workqueue: mlx5_lag mlx5_do_bond_work [mlx5_core][ 1293.492448] RIP: 0010:mlx5_lag_is_multipath+0x5/0x50 [mlx5_core][ 1293.494044] Code: e8 70 40 ff e0 48 8b 14 24 48 83 05 5c 1a 1b 00 01 e9 19 ff ff ff 48 83 05 47 1a 1b 00 01 eb d7 0f 1f 44 00 00 0f 1f 44 00 00 &lt;48&gt; 8b 87 a8 09 00 00 48 85 c0 74 26 48 83 05 a7 1b 1b 00 01 41 b8[ 1293.498673] RSP: 0018:ffff88811b2fbe40 EFLAGS: 00010202[ 1293.500152] RAX: ffff88818a94e1c0 RBX: ffff888165eca6c0 RCX: 0000000000000000[ 1293.501841] RDX: 0000000000000001 RSI: ffff88818a94e1c0 RDI: 0000000000000000[ 1293.503585] RBP: 0000000000000000 R08: ffff888119886740 R09: ffff888165eca73c[ 1293.505286] R10: 0000000000000018 R11: 0000000000000018 R12: ffff88818a94e1c0[ 1293.506979] R13: ffff888112729800 R14: 0000000000000000 R15: ffff888112729858[ 1293.508753] FS:  0000000000000000(0000) GS:ffff88852cc40000(0000) knlGS:0000000000000000[ 1293.510782] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033[ 1293.512265] CR2: 00000000000009a8 CR3: 00000001032d4002 CR4: 0000000000370ea0[ 1293.514001] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000[ 1293.515806] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400The Linux kernel CVE team has assigned CVE-2022-50002 to this issue.             
 openEuler评分：
  5.5
 Vector：CVSS：3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
 受影响版本排查(受影响/不受影响)：
  1.master(6.12.33):不受影响
2.openEuler-20.03-LTS-SP4(4.19.90):不受影响
3.openEuler-22.03-LTS-SP3(5.10.0):不受影响
4.openEuler-22.03-LTS-SP4(5.10.0):不受影响
5.openEuler-24.03-LTS(6.6.0):不受影响
6.openEuler-24.03-LTS-Next(6.6.0):不受影响
7.openEuler-24.03-LTS-SP1(6.6.0):不受影响
8.openEuler-24.03-LTS-SP2(6.6.0):不受影响

修复是否涉及abi变化(是/否)：
  1.master(6.12.33):否
2.openEuler-20.03-LTS-SP4(4.19.90):否
3.openEuler-22.03-LTS-SP3(5.10.0):否
4.openEuler-22.03-LTS-SP4(5.10.0):否
5.openEuler-24.03-LTS(6.6.0):否
6.openEuler-24.03-LTS-Next(6.6.0):否
7.openEuler-24.03-LTS-SP1(6.6.0):否
8.openEuler-24.03-LTS-SP2(6.6.0):否

原因说明：
  1.master(6.12.33):不受影响-漏洞代码不能被攻击者触发
2.openEuler-24.03-LTS(6.6.0):不受影响-漏洞代码不能被攻击者触发
3.openEuler-24.03-LTS-Next(6.6.0):不受影响-漏洞代码不能被攻击者触发
4.openEuler-24.03-LTS-SP1(6.6.0):不受影响-漏洞代码不能被攻击者触发
5.openEuler-24.03-LTS-SP2(6.6.0):不受影响-漏洞代码不能被攻击者触发
6.openEuler-20.03-LTS-SP4(4.19.90):不受影响-漏洞代码不存在
7.openEuler-22.03-LTS-SP3(5.10.0):不受影响-漏洞代码不存在
8.openEuler-22.03-LTS-SP4(5.10.0):不受影响-漏洞代码不存在

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