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CVE-2026-74651— staging: rtl8723bs: fix OOB read in rtw_get_wpa_ie()

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 rtw_get_wpa_ie() 中的越界读取问题 函数 在没有检查信息元素（Information Element, IE）长度是否足够的情况下，直接按固定偏移量读取供应商特定信息元素中的字节，从而导致对较短的尾部 IE 发生越界读取。 该函数首先通过 定位供应商特定 IE（EID 221），然后在 处比较 4 字节的 OUI（组织唯一标识符）+ 类型字段，并在 处读取一个 2 字节的版本字段。这些访问操作要求 IE 主体部分

CVSS 8.1 · High EPSS 0.22% · P13

Possible ATT&CK Techniques 1 AI

T1560 · Archive Collected Data

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 554c0a3abf216c991c5ebddcdb2c08689ecd290b< 4fc459c5cd8767ca4d9bf2f7becbd562639ba4d9 affected
554c0a3abf216c991c5ebddcdb2c08689ecd290b< b45be82387bf759931acdd21ca7dfe740f16eb97 affected
554c0a3abf216c991c5ebddcdb2c08689ecd290b< c9068f82a0906b29c905e8788edb62c3208c7c8a affected
554c0a3abf216c991c5ebddcdb2c08689ecd290b< 0d19f0600fbb610c42f2a86f95c35706dc04691b affected
554c0a3abf216c991c5ebddcdb2c08689ecd290b< 42c5a0d454aa5b54fec17162d9a1f8c30f8af45a affected
554c0a3abf216c991c5ebddcdb2c08689ecd290b< e167a38a8a8f50f137721fef1a1fbba0f4588b5d affected
554c0a3abf216c991c5ebddcdb2c08689ecd290b< 01ab275f8f3e497a13ebbe4ded44ec0623bccde3 affected
554c0a3abf216c991c5ebddcdb2c08689ecd290b< 1c3e23e78862493e8cf1adad02b10ffcb8b9921c affected
… +10 more rows
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I. Basic Information for CVE-2026-74651

Vulnerability Information
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Vulnerability Title
staging: rtl8723bs: fix OOB read in rtw_get_wpa_ie()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix OOB read in rtw_get_wpa_ie() rtw_get_wpa_ie() reads bytes at fixed offsets into a vendor-specific information element without checking that the element is long enough, causing an out-of-bounds read for a short trailing IE. The function locates a vendor-specific IE (EID 221) with rtw_get_ie() and then compares a 4-byte OUI+type at pbuf + 2 and reads a 2-byte version word at pbuf + 6. Those accesses require the IE body to be at least 6 bytes, but rtw_get_ie() only guarantees that the element fits within the buffer; it does not enforce a minimum body length. A vendor-specific IE whose length byte is 0 to 5, placed at the end of the buffer, therefore makes these reads run past the end of the IE and past the end of the buffer itself. The buffer holds information elements taken from received management frames and from the IE blob passed to rtw_cfg80211_set_wpa_ie(), which is kmemdup'd to its exact length, so the read can run off the end of the allocation. The sibling helpers rtw_get_sec_ie(), rtw_get_wapi_ie() and rtw_get_wps_ie() in this file already reject too-short vendor-specific IEs before their OUI memcmp(); rtw_get_wpa_ie() was never brought in line with them, and needs a minimum of 6 rather than 4 bytes because of the version word. Add the missing length check.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
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 ~ 4fc459c5cd8767ca4d9bf2f7becbd562639ba4d9 -
Linux Linux 4.12 -

II. Public POCs for CVE-2026-74651

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III. Intelligence Information for CVE-2026-74651

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Patches & Fixes for CVE-2026-74651 (8)

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

CVE-2026-74705 10.0 CRITICAL udp: fix potential use-after-free in tunnel segmentation
CVE-2026-74612 10.0 CRITICAL veth: fix skb length accounting after XDP frag adjustment
CVE-2026-74597 9.8 CRITICAL ip6_tunnel: clear skb2->cb[] in ip6ip6_err()
CVE-2026-74591 9.8 CRITICAL mm/filemap: __filemap_add_folio() restore index before retrying
CVE-2026-74662 9.8 CRITICAL inet: frags: publish queues before arming timer
CVE-2026-74669 9.8 CRITICAL ipvs: clear IPv4 options after rebasing tunnel ICMP errors
CVE-2026-74608 9.8 CRITICAL smb: client: Fix use-after-free in cifs_try_adding_channels()
CVE-2026-74628 9.8 CRITICAL net/x25: fix use-after-free of the socket by its timers
CVE-2026-74688 9.8 CRITICAL sctp: clear control chunk transport if it is being removed
CVE-2026-74587 9.8 CRITICAL sctp: fix use-after-free of cached ASCONF chunk
CVE-2026-74588 9.8 CRITICAL sctp: keep chunk->transport in step with the list it is queued on
CVE-2026-74727 9.8 CRITICAL ovpn: skip rehash for peers already removed from by_id
CVE-2026-74611 9.8 CRITICAL tls: rx: restore msg_iter before TLS 1.3 optimistic retry
CVE-2026-74723 9.8 CRITICAL btrfs: lzo: reject inline extents without valid headers
CVE-2026-74617 9.8 CRITICAL dibs: initialise dibs->lock in dibs_dev_alloc()
CVE-2026-74586 9.8 CRITICAL sctp: clear new_transport when removing a peer
CVE-2026-74616 9.8 CRITICAL xdp: reject clones that overrun skb_shared_info tailroom
CVE-2026-74730 9.8 CRITICAL NFS: Pin the 'struct nfs_server' during a FREE_STATEID call
CVE-2026-74712 9.3 CRITICAL vdpa/mlx5: Fix buffer length in create_direct_keys()
CVE-2026-74665 9.1 CRITICAL net: fix skb length accounting after generic XDP frag adjustment

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-2026-74651

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