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CVE-2026-74650— staging: rtl8723bs: fix OOB read in WMM_param_handler()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，已修复以下漏洞： staging: rtl8723bs: 修复 WMM_param_handler() 中的越界读取 WMM_param_handler() 函数从接收到的信息元素（Information Element）中复制固定大小的 WMM 参数元素时，未检查该元素是否足够长，导致在 WMM 信息元素（IE）较短时发生越界读取。 该处理器尝试从 pIE->data + 6 处读取 sizeof(struct WMM_para_element)（18 字节）的数据，因此要求 pIE->l

AI Predicted 7.5 Difficulty: Easy EPSS 0.21% · P12

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 554c0a3abf216c991c5ebddcdb2c08689ecd290b< 6cdca4c8b64c15a3ab9ad7a85f482e9519eadf93 affected
554c0a3abf216c991c5ebddcdb2c08689ecd290b< 2bee6f7a0f0125238951e31da2e96d06fe359043 affected
554c0a3abf216c991c5ebddcdb2c08689ecd290b< 1158b9931207392d6dd136aa0c4be18893b50fa1 affected
554c0a3abf216c991c5ebddcdb2c08689ecd290b< ce2399717de242344880044b91a20a712644fdfb affected
554c0a3abf216c991c5ebddcdb2c08689ecd290b< e5b7610008f4e6a80c8b071aa77ddbd5e17ea472 affected
554c0a3abf216c991c5ebddcdb2c08689ecd290b< e429c6dfd5d2324cd866daaf4c29d5cfe4dea0e4 affected
554c0a3abf216c991c5ebddcdb2c08689ecd290b< ae21407350151bddfd4fea7aa39bd0643c0ca9d3 affected
4.12 affected
… +8 more rows
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I. Basic Information for CVE-2026-74650

Vulnerability Information
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Vulnerability Title
staging: rtl8723bs: fix OOB read in WMM_param_handler()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix OOB read in WMM_param_handler() WMM_param_handler() copies a fixed-size WMM parameter element out of a received information element without checking that the element is long enough, causing an out-of-bounds read for a short WMM IE. The handler reads sizeof(struct WMM_para_element) (18) bytes at pIE->data + 6, so it requires pIE->length to be at least 24 (WLAN_WMM_LEN), but it never validates the length. Two of its three callers reach it after matching only the WMM OUI: OnAssocRsp() in rtw_mlme_ext.c matches a 6-byte OUI, and join_cmd_hdl() matches a 4-byte OUI, before calling the handler. A vendor-specific IE carrying the WMM OUI but a length between 6 and 23, placed in an association response or in the IE blob handed to join_cmd_hdl(), passes the OUI check and then makes the memcmp() and memcpy() at pIE->data + 6 read past the end of the element. OnAssocRsp() parses a frame received from the AP, so this is reachable from a remote peer. The remaining caller in rtw_wlan_util.c already guards the handler with "pIE->length == WLAN_WMM_LEN". Move the equivalent check into the handler itself so every caller is covered; the sibling IE handlers in the same parsing loop (HT_caps_handler(), HT_info_handler(), ERP_IE_handler()) likewise bound their accesses by pIE->length.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 554c0a3abf216c991c5ebddcdb2c08689ecd290b ~ 6cdca4c8b64c15a3ab9ad7a85f482e9519eadf93 -
Linux Linux 4.12 -

II. Public POCs for CVE-2026-74650

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III. Intelligence Information for CVE-2026-74650

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Patches & Fixes for CVE-2026-74650 (7)

Same Patch Batch · Linux · 2026-08-22 · 150 CVEs total

CVE-2026-74638 drm/v3d: Serialize the scheduler timeout handlers
CVE-2026-74621 net/sched: act_ct: fix sk_buff leak when the header checks reject a packet
CVE-2026-74622 net: atlantic: free RX pages of consumed but not refilled buffers
CVE-2026-74623 net: atlantic: free stranded TX buffers on ring deinit
CVE-2026-74624 netfilter: nf_conntrack: defer invalid log until after unlock
CVE-2026-74625 netfilter: bridge: release template ct on non-IP path
CVE-2026-74627 net: devmem: prevent net-iov / page mixing
CVE-2026-74626 NTB: ntb_netdev: Preserve RX queue depth on allocation failure
CVE-2026-74628 net/x25: fix use-after-free of the socket by its timers
CVE-2026-74629 net/dibs: Correct freeing of dmb_clientid_arr
CVE-2026-74631 net: smc: fix splice entry lifetime imbalance in smc_rx_splice
CVE-2026-74630 ipv6: prevent in6_dev_get() from resurrecting inet6_dev
CVE-2026-74632 mm/huge_memory: fix huge_zero_pfn race
CVE-2026-74633 tracing: Fix NULL pointer dereference in module event cache removal
CVE-2026-74634 ring-buffer: Prevent subbuf order change when resizing is disabled
CVE-2026-74635 fbdev: bitblit: bound-check glyph index in bit_cursor()
CVE-2026-74636 tracing: Fix race between update_event_fields and, event_define_fields
CVE-2026-74637 perf/core: Fix group leader use-after-free after sibling detach
CVE-2026-74639 ALSA: us144mkii: re-anchor capture URBs on resubmission
CVE-2026-74651 staging: rtl8723bs: fix OOB read in rtw_get_wpa_ie()

Showing top 20 of 150 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-74650

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