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CVE-2026-98704— wifi: mac80211: keep fallback association elements alive

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，以下漏洞已得到修复： wifi: mac80211：保持备用关联元素的有效性 当设备尝试关联到一个未传输的 MBSSID（多 BSSID）配置时，在确定工作信道并应用 HT（高速）功能的过程中，会读取已被释放的内存。 当关联响应中缺少 WMM、HT 或 VHT 信息时，ieee80211_assoc_config_link() 函数会解析缓存的 BSS 信息元素（IEs），并从备用解析结果中复制缺失的元素指针。对于未传输的 MBSSID 配置，这些指针指向由解析对象所拥有的合并配置文件存储区

AI Predicted 7.8 Difficulty: Moderate EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1552 · Unsecured Credentials

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux 5023b14cf4df4d22e1a80738167f3438c9e62e5f< 1d9644753d46c86b4e5c05bd6d9d35339ea27331 affected
5023b14cf4df4d22e1a80738167f3438c9e62e5f< d0183cd1f6a2dba9e63be20af2f65093c9c8d121 affected
5023b14cf4df4d22e1a80738167f3438c9e62e5f< 0878594c5806dd29fa5e16cc026ce19158afdad2 affected
5023b14cf4df4d22e1a80738167f3438c9e62e5f< a10a2f80476d166fd81c361ec0319493671b694e affected
5.2 affected
< 5.2 unaffected
6.12.113≤ 6.12.* unaffected
6.18.56≤ 6.18.* unaffected
… +2 more rows
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I. Basic Information for CVE-2026-98704

Vulnerability Information
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Vulnerability Title
wifi: mac80211: keep fallback association elements alive
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: keep fallback association elements alive Associating to a non-transmitted MBSSID profile reads freed memory while determining the operating channel and applying HT capabilities. When an association response omits WMM, HT, or VHT information, ieee80211_assoc_config_link() parses the cached BSS IEs and copies the missing element pointers out of that fallback parse. For a non-transmitted MBSSID profile those pointers refer to merged-profile storage owned by the parse object, and the fallback block frees that object at its end. The copied pointers are used afterwards to determine the operating channel, configure bandwidth, and apply HT capabilities. Keep the fallback parse result alive until association setup finishes. [reorder variable declaration]
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 5023b14cf4df4d22e1a80738167f3438c9e62e5f ~ 1d9644753d46c86b4e5c05bd6d9d35339ea27331 -
Linux Linux 5.2 -

II. Public POCs for CVE-2026-98704

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III. Intelligence Information for CVE-2026-98704

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Patches & Fixes for CVE-2026-98704 (4)

Same Patch Batch · Linux · 2026-10-18 · 435 CVEs total

CVE-2026-98720 KVM: nVMX: Force MSR bitmap refresh if runtime eVMCS controls are modified
CVE-2026-98733 Bluetooth: hci_core: Serialize fragmented ISO packet queueing
CVE-2026-98732 Bluetooth: btintel: fix buffer over-read in btintel_hw_error()
CVE-2026-98731 Bluetooth: btintel_pcie: fix plen overflow in btintel_pcie_recv_frame()
CVE-2026-98730 Bluetooth: btintel_pcie: reject oversized TX packets in send_frame()
CVE-2026-98729 x86/mm: Don't apply va_align to hugetlb mappings on AMD F15h
CVE-2026-98728 tpm: fix off-by-four bounds check in tpm2_get_random()
CVE-2026-98727 nvme-multipath: set BLK_FEAT_ZONED only after the zone info is known
CVE-2026-98726 nvme-multipath: fix underflow in ANA log bounds checks
CVE-2026-98725 nvmet-auth: fix out-of-bounds write in nvmet_auth_challenge()
CVE-2026-98724 nvmet: pci-epf: reject too-short SGL segments
CVE-2026-98723 nvmet: copy the hostid into the ctrl before creating PR pc_refs
CVE-2026-98722 mtd: block2mtd: Fix divide error when erase_size is zero
CVE-2026-98721 mtd: rawnand: cadence: Initialize IRQ state before requesting IRQ
CVE-2026-98709 wifi: mac80211: count only matching reservations in reserved switch
CVE-2026-98712 KVM: arm64: vgic: Take a refcount on IRQs referenced by last_lr_irq
CVE-2026-98711 wifi: cw1200: fix TX padding OOB read leaking heap data to device
CVE-2026-98710 wifi: iwlegacy: 3945: free EEPROM data on remove
CVE-2026-98713 KVM: arm64: Apply the fine-grained UNDEFs without FEAT_FGT
CVE-2026-98707 wifi: mac80211: shut down RX BA session timer on teardown

Showing top 20 of 435 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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