CVE-2026-90018— Linux内核 rtl8723bs 栈溢出漏洞
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。
在 Linux 内核中，以下漏洞已得到修复： staging: rtl8723bs: 修复 中的越界读取（OOB read）/ 栈溢出 函数用于遍历从无线管理帧中获取的 WPS 信息元素（IE）内部的 WPS 属性。对于每一个候选属性，该函数仅检查固定的 4 字节属性头（2 字节 ID + 2 字节长度）是否位于 IE 边界内： 其中， （以及因此得到的 ）直接取自网络数据包，且在使用前从未对其与 IE 中剩余字节数进行校验，却直接被用作以下 的长度参数： 由于 完全由攻击者控制（取值范围为 0 到 65535 +
影响版本矩阵 16
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 554c0a3abf216c991c5ebddcdb2c08689ecd290b< 931640dfcb8cfa08f6cfb46229716d8072356420 |
affected |
554c0a3abf216c991c5ebddcdb2c08689ecd290b< 3a6457ebf39080b87c712657fdb38f34a24fc3ff |
affected | ||
554c0a3abf216c991c5ebddcdb2c08689ecd290b< fd5e24ea8373347d0352f153a66e8647337d1b10 |
affected | ||
554c0a3abf216c991c5ebddcdb2c08689ecd290b< a53d1ac9ce63db07943b2b2248111003851fb00f |
affected | ||
554c0a3abf216c991c5ebddcdb2c08689ecd290b< ff61aa3289355dafa811550a1764691cd1f5d33b |
affected | ||
554c0a3abf216c991c5ebddcdb2c08689ecd290b< 34f51d196c43a42046d229de5e79025d5ca553ca |
affected | ||
554c0a3abf216c991c5ebddcdb2c08689ecd290b< 99aa998dec83ba180822f70e6d48a514fc81c20d |
affected | ||
4.12 |
affected | ||
| … +8 条更多 | |||
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一、 漏洞 CVE-2026-90018 基础信息
漏洞信息
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Vulnerability Title
staging: rtl8723bs: fix OOB read / stack overflow in rtw_get_wps_attr()
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
staging: rtl8723bs: fix OOB read / stack overflow in rtw_get_wps_attr()
rtw_get_wps_attr() walks WPS attributes inside a WPS IE taken from
a wireless management frame. For each candidate attribute it only
checks that the fixed 4-byte attribute header (2-byte ID + 2-byte
length) fits inside the IE:
if (attr_ptr + 4 > wps_ie + wps_ielen)
break;
u16 attr_id = get_unaligned_be16(attr_ptr);
u16 attr_data_len = get_unaligned_be16(attr_ptr + 2);
u16 attr_len = attr_data_len + 4;
attr_data_len (and therefore attr_len) is read directly from the
wire and is never checked against the remaining bytes in the IE
before being used as the size of:
memcpy(buf_attr, attr_ptr, attr_len);
Since attr_len is fully attacker controlled (0 to 65535+4), this is
both a heap OOB read of wps_ie, and, more seriously, a stack buffer
overflow at several call sites where buf_attr is a single-byte
stack variable, e.g. rtw_get_wps_attr_content()'s callers passing
WPS_ATTR_SELECTED_REGISTRAR into a stack "u8 sr"/"u8
selected_registrar" (drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c,
drivers/staging/rtl8723bs/core/rtw_mlme_ext.c). A crafted WPS IE in a
beacon or probe response processed during scanning can therefore
smash the stack of the parsing thread.
rtw_get_wps_attr_content() itself has no independent length check
and simply trusts the attr_len it gets back from rtw_get_wps_attr(),
so fixing the bound here also fixes that caller.
The "attr_ptr + 4 > wps_ie + wps_ielen" header check above was added
by commit 1463ca3ec6601 ("staging: rtl8723bs: fix OOB reads in
rtw_get_sec_ie(), rtw_get_wapi_ie(), and rtw_get_wps_attr()"), which
bounded the fixed header but never extended the check to cover the
variable-length attribute data that follows it. Add that missing
check before attr_len is used as a memcpy() length or accepted as a
match.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-90018 的公开POC
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CVE-2026-90018 其他参考 (7)
同批安全公告 · Linux · 2026-09-16 · 共 276 条
| CVE-2026-90048 | 9.8 CRITICAL | Linux内核NTFS3文件系统越界写漏洞 |
| CVE-2026-90012 | 9.8 CRITICAL | SPI DMA映射所有权修复 |
| CVE-2026-89970 | 9.8 CRITICAL | NVM Target SQ拆除时超时工作未同步 |
| CVE-2026-89857 | 9.8 CRITICAL | QLogic qla2xxx NVMe LS拒绝竞态条件漏洞 |
| CVE-2026-89969 | 9.8 CRITICAL | Linux内核 nvmet-tcp 越界写入漏洞 |
| CVE-2026-89847 | 9.8 CRITICAL | qla2xxx SCSI驱动异步IOCB超时双重完成漏洞 |
| CVE-2026-89972 | 9.8 CRITICAL | NVMe驱动错误路径SRCU宽限期缺失漏洞 |
| CVE-2026-89990 | 9.8 CRITICAL | Ceph ceph_mds_check_access 互斥锁缺失漏洞 |
| CVE-2026-90036 | 9.8 CRITICAL | Linux NFSd 阻塞锁收割时释放后使用漏洞 |
| CVE-2026-90038 | 9.8 CRITICAL | Linux内核NFSD导出撤销后使用漏洞 |
| CVE-2026-90037 | 9.8 CRITICAL | Linux内核NFSD close_lru释放后使用漏洞 |
| CVE-2026-89788 | 9.8 CRITICAL | Linux kernel ksmbd 释放后使用漏洞 |
| CVE-2026-89783 | 9.8 CRITICAL | Linux内核 xfrm6 越界写入漏洞 |
| CVE-2026-90042 | 9.8 CRITICAL | Ceph 虚拟内存分配缓冲区文件名解密漏洞 |
| CVE-2026-89778 | 9.8 CRITICAL | isofs 空 zisofs 块页面数组越界访问漏洞 |
| CVE-2026-89916 | 9.3 CRITICAL | KVM arm64 VNCR失效重试漏洞 |
| CVE-2026-89915 | 9.3 CRITICAL | KVM arm64 移除虚拟机级 VNCR 映射计数器 |
| CVE-2026-90049 | 9.3 CRITICAL | 内核网络子系统中skb_zerocopy处理中的缺陷 |
| CVE-2026-89775 | 9.3 CRITICAL | KVM arm64 VNCR TLB大小计算漏洞 |
| CVE-2026-89918 | 9.3 CRITICAL | KVM arm64 TLBI失效处理漏洞 |
显示前 20 条，共 276 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-90018
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