CVE-2022-50279

一、漏洞信息
 漏洞编号：[CVE-2022-50279](https://nvd.nist.gov/vuln/detail/CVE-2022-50279)
 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：N/A None
  Vector：CVSS：3.0/
 漏洞简述：
  In the Linux kernel, the following vulnerability has been resolved:wifi: rtlwifi: Fix global-out-of-bounds bug in _rtl8812ae_phy_set_txpower_limit()There is a global-out-of-bounds reported by KASAN:  BUG: KASAN: global-out-of-bounds in  _rtl8812ae_eq_n_byte.part.0+0x3d/0x84 [rtl8821ae]  Read of size 1 at addr ffffffffa0773c43 by task NetworkManager/411  CPU: 6 PID: 411 Comm: NetworkManager Tainted: G      D  6.1.0-rc8+ #144 e15588508517267d37  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009),  Call Trace:   <TASK>   ...   kasan_report+0xbb/0x1c0   _rtl8812ae_eq_n_byte.part.0+0x3d/0x84 [rtl8821ae]   rtl8821ae_phy_bb_config.cold+0x346/0x641 [rtl8821ae]   rtl8821ae_hw_init+0x1f5e/0x79b0 [rtl8821ae]   ...   </TASK>The root cause of the problem is that the comparison order of prate_section  in _rtl8812ae_phy_set_txpower_limit() is wrong. The_rtl8812ae_eq_n_byte() is used to compare the first n bytes of the twostrings from tail to head, which causes the problem. In the_rtl8812ae_phy_set_txpower_limit(), it was originally intended to meetthis requirement by carefully designing the comparison order.For example,  pregulation  and  pbandwidth  are compared in order oflength from small to large, first is 3 and last is 4. However, thecomparison order of  prate_section  dose not obey such order requirement,therefore when  prate_section  is  HT , when comparing from tail to head,it will lead to access out of bounds in _rtl8812ae_eq_n_byte(). Asmentioned above, the _rtl8812ae_eq_n_byte() has the same function asstrcmp(), so just strcmp() is enough.Fix it by removing _rtl8812ae_eq_n_byte() and use strcmp() barely.Although it can be fixed by adjusting the comparison order of prate_section , this may cause the value of  rate_section  to not befrom 0 to 5. In addition, commit  21e4b0726dc6  not only moved driverfrom staging to regular tree, but also added setting txpower limitfunction during the driver config phase, so the problem was introducedby this commit.
 漏洞公开时间：2025-09-15 23:15:38
 漏洞创建时间：2025-09-15 23:44:23
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2022-50279
<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/fc3442247716fc426bbcf62ed65e086e48a6d44f |  |
|  | https://git.kernel.org/stable/c/28ea268d95e57cdf6394a058f0d854206d478772 |  |
|  | https://git.kernel.org/stable/c/1e950b9a841bc96e98ee25680d5c7aa305120be1 |  |
|  | https://git.kernel.org/stable/c/0c962dcd6bf64b78eaffc09e497a2beb4e48bc32 |  |
|  | https://git.kernel.org/stable/c/f1fe40120de6ad4ffa8299fde035a5feba10d4fb |  |
|  | https://git.kernel.org/stable/c/057b52461dc005ecd85a3e4998913b1492ec0f72 |  |
|  | https://git.kernel.org/stable/c/117dbeda22ec5ea0918254d03b540ef8b8a64d53 |  |
|  | https://lore.kernel.org/linux-cve-announce/2025091506-CVE-2022-50279-412b@gregkh/T/#u |  |
|  | https://security-tracker.debian.org/tracker/CVE-2022-50279 |  |
|  | https://www.cve.org/CVERecord?id=CVE-2022-50279 |  |
|  | https://nvd.nist.gov/vuln/detail/CVE-2022-50279 |  |
|  | https://lore.kernel.org/linux-cve-announce/2025091506-CVE-2022-50279-412b@gregkh/T |  |
|  | https://bugzilla.redhat.com/show_bug.cgi?id=2395294 |  |

</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://git.kernel.org/stable/c/fc3442247716fc426bbcf62ed65e086e48a6d44f |  | ljqc |
|  |  | https://git.kernel.org/stable/c/fc3442247716fc426bbcf62ed65e086e48a6d44f |  | cvelistv5 |
|  |  | https://git.kernel.org/stable/c/28ea268d95e57cdf6394a058f0d854206d478772 |  | cvelistv5 |
|  |  | https://git.kernel.org/stable/c/1e950b9a841bc96e98ee25680d5c7aa305120be1 |  | cvelistv5 |
|  |  | https://git.kernel.org/stable/c/0c962dcd6bf64b78eaffc09e497a2beb4e48bc32 |  | cvelistv5 |
|  |  | https://git.kernel.org/stable/c/f1fe40120de6ad4ffa8299fde035a5feba10d4fb |  | cvelistv5 |
|  |  | https://git.kernel.org/stable/c/057b52461dc005ecd85a3e4998913b1492ec0f72 |  | cvelistv5 |
|  |  | https://git.kernel.org/stable/c/117dbeda22ec5ea0918254d03b540ef8b8a64d53 |  | cvelistv5 |

</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:wifi: rtlwifi: Fix global-out-of-bounds bug in _rtl8812ae_phy_set_txpower_limit()There is a global-out-of-bounds reported by KASAN:  BUG: KASAN: global-out-of-bounds in  _rtl8812ae_eq_n_byte.part.0+0x3d/0x84 [rtl8821ae]  Read of size 1 at addr ffffffffa0773c43 by task NetworkManager/411  CPU: 6 PID: 411 Comm: NetworkManager Tainted: G      D  6.1.0-rc8+ #144 e15588508517267d37  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009),  Call Trace:   &lt;TASK&gt;   ...   kasan_report+0xbb/0x1c0   _rtl8812ae_eq_n_byte.part.0+0x3d/0x84 [rtl8821ae]   rtl8821ae_phy_bb_config.cold+0x346/0x641 [rtl8821ae]   rtl8821ae_hw_init+0x1f5e/0x79b0 [rtl8821ae]   ...   &lt;/TASK&gt;The root cause of the problem is that the comparison order of prate_section  in _rtl8812ae_phy_set_txpower_limit() is wrong. The_rtl8812ae_eq_n_byte() is used to compare the first n bytes of the twostrings from tail to head, which causes the problem. In the_rtl8812ae_phy_set_txpower_limit(), it was originally intended to meetthis requirement by carefully designing the comparison order.For example,  pregulation  and  pbandwidth  are compared in order oflength from small to large, first is 3 and last is 4. However, thecomparison order of  prate_section  dose not obey such order requirement,therefore when  prate_section  is  HT , when comparing from tail to head,it will lead to access out of bounds in _rtl8812ae_eq_n_byte(). Asmentioned above, the _rtl8812ae_eq_n_byte() has the same function asstrcmp(), so just strcmp() is enough.Fix it by removing _rtl8812ae_eq_n_byte() and use strcmp() barely.Although it can be fixed by adjusting the comparison order of prate_section , this may cause the value of  rate_section  to not befrom 0 to 5. In addition, commit  21e4b0726dc6  not only moved driverfrom staging to regular tree, but also added setting txpower limitfunction during the driver config phase, so the problem was introducedby this commit.The Linux kernel CVE team has assigned CVE-2022-50279 to this issue.
 openEuler评分：
  5.3
 Vector：CVSS：3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H
 受影响版本排查(受影响/不受影响)：
  1.openEuler-20.03-LTS-SP4(4.19.90):受影响
2.master(6.12.33):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.openEuler-20.03-LTS-SP4(4.19.90):正常修复
2.master(6.12.33):不受影响-漏洞代码不能被攻击者触发
3.openEuler-22.03-LTS-SP3(5.10.0):不受影响-漏洞代码不能被攻击者触发
4.openEuler-22.03-LTS-SP4(5.10.0):不受影响-漏洞代码不能被攻击者触发
5.openEuler-24.03-LTS(6.6.0):不受影响-漏洞代码不能被攻击者触发
6.openEuler-24.03-LTS-Next(6.6.0):不受影响-漏洞代码不能被攻击者触发
7.openEuler-24.03-LTS-SP1(6.6.0):不受影响-漏洞代码不能被攻击者触发
8.openEuler-24.03-LTS-SP2(6.6.0):不受影响-漏洞代码不能被攻击者触发

三、漏洞修复
安全公告链接：https://www.openeuler.org/zh/security/safety-bulletin/detail/?id=openEuler-SA-2025-2406

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