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CVE-2022-50279— 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_rtl8812ae_phy_set_txpower_limit函数中prate_section比较顺序错误,可能导致全局溢出。

AI 预测 5.5 利用难度: 困难 EPSS 0.16% · P5

影响版本矩阵 16

厂商产品 版本范围状态
Linux Linux 21e4b0726dc671c423e2dc9a85364716219c4502< fc3442247716fc426bbcf62ed65e086e48a6d44f affected
21e4b0726dc671c423e2dc9a85364716219c4502< 28ea268d95e57cdf6394a058f0d854206d478772 affected
21e4b0726dc671c423e2dc9a85364716219c4502< 1e950b9a841bc96e98ee25680d5c7aa305120be1 affected
21e4b0726dc671c423e2dc9a85364716219c4502< 0c962dcd6bf64b78eaffc09e497a2beb4e48bc32 affected
21e4b0726dc671c423e2dc9a85364716219c4502< f1fe40120de6ad4ffa8299fde035a5feba10d4fb affected
21e4b0726dc671c423e2dc9a85364716219c4502< 057b52461dc005ecd85a3e4998913b1492ec0f72 affected
21e4b0726dc671c423e2dc9a85364716219c4502< 117dbeda22ec5ea0918254d03b540ef8b8a64d53 affected
3.18 affected
… +8 条更多
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一、 漏洞 CVE-2022-50279 基础信息

漏洞信息

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Vulnerability Title
wifi: rtlwifi: Fix global-out-of-bounds bug in _rtl8812ae_phy_set_txpower_limit()
来源: CVE Program / CVE List V5
Vulnerability Description
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 two strings from tail to head, which causes the problem. In the _rtl8812ae_phy_set_txpower_limit(), it was originally intended to meet this requirement by carefully designing the comparison order. For example, "pregulation" and "pbandwidth" are compared in order of length from small to large, first is 3 and last is 4. However, the comparison 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(). As mentioned above, the _rtl8812ae_eq_n_byte() has the same function as strcmp(), 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 be from 0 to 5. In addition, commit "21e4b0726dc6" not only moved driver from staging to regular tree, but also added setting txpower limit function during the driver config phase, so the problem was introduced by this commit.
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_rtl8812ae_phy_set_txpower_limit函数中prate_section比较顺序错误,可能导致全局溢出。
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

厂商 产品 影响版本 CPE 订阅
Linux Linux 21e4b0726dc671c423e2dc9a85364716219c4502 ~ fc3442247716fc426bbcf62ed65e086e48a6d44f -
Linux Linux 3.18 -

二、漏洞 CVE-2022-50279 的公开POC

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三、漏洞 CVE-2022-50279 的情报信息

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同批安全公告 · Linux · 2025-09-15 · 共 210 条

CVE-2022-50235 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2022-50335 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2023-53192 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2023-53253 8.8 HIGH Linux kernel 安全漏洞
CVE-2023-53226 8.8 HIGH Linux kernel 安全漏洞
CVE-2022-50241 8.8 HIGH Linux kernel 安全漏洞
CVE-2023-53194 8.4 HIGH Linux kernel 安全漏洞
CVE-2023-53213 8.1 HIGH Linux kernel 安全漏洞
CVE-2023-53186 8.1 HIGH Linux kernel 安全漏洞
CVE-2022-50310 7.8 HIGH Linux kernel 安全漏洞
CVE-2023-53254 7.8 HIGH Linux kernel 安全漏洞
CVE-2023-53252 7.8 HIGH Linux kernel 安全漏洞
CVE-2023-53170 7.8 HIGH Linux kernel 安全漏洞
CVE-2023-53176 7.8 HIGH Linux kernel 安全漏洞
CVE-2023-53178 7.8 HIGH Linux kernel 安全漏洞
CVE-2023-53179 7.8 HIGH Linux kernel 安全漏洞
CVE-2023-53184 7.8 HIGH Linux kernel 安全漏洞
CVE-2022-50315 7.8 HIGH Linux kernel 安全漏洞
CVE-2023-53187 7.8 HIGH Linux kernel 安全漏洞
CVE-2025-39800 7.8 HIGH Linux kernel 安全漏洞

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IV. Related Vulnerabilities

V. Comments for CVE-2022-50279

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