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CVE-2026-74648— staging: rtl8723bs: validate monitor transmit frame lengths

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：验证监视器传输帧长度 函数在移除 radiotap 头部后，会读取 802.11 帧控制字段，但未检查是否仍保留基本的 802.11 头部。 此外，数据路径在确认 （套接字缓冲区）中确实存在计算出的 802.11、QoS 和 SNAP 头部范围之前，就提前执行了这些头部的提取操作。因此，截断的帧可能导致越界读取，或导致用于以太网地址写入的数据不足。 本修复将拒绝不包含基本 802.11 头部的帧，以及不包含完整计算头部范围的数据帧。

CVSS 7.8 · High EPSS 0.13% · P3

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 554c0a3abf216c991c5ebddcdb2c08689ecd290b< f03398d835f5249c49546f0eb0d0df6792b95d5f affected
554c0a3abf216c991c5ebddcdb2c08689ecd290b< a3ac6d849de5f7abe14761d741bbb843ac793454 affected
554c0a3abf216c991c5ebddcdb2c08689ecd290b< 7edd3adb0c80d70b4237640275c559610f438476 affected
554c0a3abf216c991c5ebddcdb2c08689ecd290b< c5e5d78743992e235b76d2ebe5a403d60315aa8a affected
554c0a3abf216c991c5ebddcdb2c08689ecd290b< 7b0f62d2986a28e5e4188366bc2f4e2868b14790 affected
554c0a3abf216c991c5ebddcdb2c08689ecd290b< 8b3e4ed9c35d3d3b64fcc23f4a1f22b37c1865b1 affected
554c0a3abf216c991c5ebddcdb2c08689ecd290b< bd88f6289b7e483216a9c1df15a0460ef9b02cb6 affected
554c0a3abf216c991c5ebddcdb2c08689ecd290b< 6829665d050983907b560173e49dcc6c11cb2730 affected
… +10 more rows
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I. Basic Information for CVE-2026-74648

Vulnerability Information
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Vulnerability Title
staging: rtl8723bs: validate monitor transmit frame lengths
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: validate monitor transmit frame lengths rtw_cfg80211_monitor_if_xmit_entry() removes the radiotap header and then reads the 802.11 frame control field without checking that a base 802.11 header remains. The data path also pulls the calculated 802.11, QoS and SNAP header span before confirming that the skb contains it. A truncated frame can therefore cause out-of-bounds reads or leave insufficient data for the Ethernet address writes. Reject frames that do not contain the base 802.11 header and data frames that do not contain their complete calculated header span.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 ~ f03398d835f5249c49546f0eb0d0df6792b95d5f -
Linux Linux 4.12 -

II. Public POCs for CVE-2026-74648

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III. Intelligence Information for CVE-2026-74648

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Patches & Fixes for CVE-2026-74648 (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-2026-74587 9.8 CRITICAL sctp: fix use-after-free of cached ASCONF chunk
CVE-2026-74591 9.8 CRITICAL mm/filemap: __filemap_add_folio() restore index before retrying
CVE-2026-74688 9.8 CRITICAL sctp: clear control chunk transport if it is being removed
CVE-2026-74597 9.8 CRITICAL ip6_tunnel: clear skb2->cb[] in ip6ip6_err()
CVE-2026-74617 9.8 CRITICAL dibs: initialise dibs->lock in dibs_dev_alloc()
CVE-2026-74616 9.8 CRITICAL xdp: reject clones that overrun skb_shared_info tailroom
CVE-2026-74628 9.8 CRITICAL net/x25: fix use-after-free of the socket by its timers
CVE-2026-74608 9.8 CRITICAL smb: client: Fix use-after-free in cifs_try_adding_channels()
CVE-2026-74669 9.8 CRITICAL ipvs: clear IPv4 options after rebasing tunnel ICMP errors
CVE-2026-74662 9.8 CRITICAL inet: frags: publish queues before arming timer
CVE-2026-74730 9.8 CRITICAL NFS: Pin the 'struct nfs_server' during a FREE_STATEID call
CVE-2026-74727 9.8 CRITICAL ovpn: skip rehash for peers already removed from by_id
CVE-2026-74586 9.8 CRITICAL sctp: clear new_transport when removing a peer
CVE-2026-74723 9.8 CRITICAL btrfs: lzo: reject inline extents without valid headers
CVE-2026-74588 9.8 CRITICAL sctp: keep chunk->transport in step with the list it is queued on
CVE-2026-74611 9.8 CRITICAL tls: rx: restore msg_iter before TLS 1.3 optimistic retry
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-2026-74648

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