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CVE-2026-98331— wifi: mac80211: unlist vifs when their netdev is unregistered

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： wifi: mac80211：在 netdev 注销时从列表中移除虚拟接口（vifs） mac80211 仅在通过 移除接口时，才会将虚拟接口从 列表中移除，而该操作发生在 netdev 注销之前。然而，存在一种情况：netdev 可能在未经过上述流程的情况下被注销。例如，当持有 wiphy 的网络命名空间（netns）被销毁时，wiphy 应移至初始网络命名空间（init_ns），但该过程可能会因分配失败而出现问题。 此时，mac80211 列表中会残留一个已经不存在的接

CVSS 7.0 · High EPSS 0.13% · P2

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 463d018323851a608eef52a9427b0585005c647f< a22c02863439993095acd0c3db97fa53cd515f4f affected
463d018323851a608eef52a9427b0585005c647f< 20a56e96a6f7b4dfbd13f8732fd2673409fc7ba0 affected
463d018323851a608eef52a9427b0585005c647f< b735ad1a9aca6080192c1316cf2706e5e1318762 affected
463d018323851a608eef52a9427b0585005c647f< d45bf731ec7085d2cc2c5d179d3b3b6c743d4fb1 affected
463d018323851a608eef52a9427b0585005c647f< 821bab0456dfca12acef6df702c8f2477d313227 affected
463d018323851a608eef52a9427b0585005c647f< eee2efd82867b623982ac51925b5a1812a74c50d affected
2.6.32 affected
< 2.6.32 unaffected
… +6 more rows
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I. Basic Information for CVE-2026-98331

Vulnerability Information
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Vulnerability Title
wifi: mac80211: unlist vifs when their netdev is unregistered
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: unlist vifs when their netdev is unregistered mac80211 only removes vifs from the local->interfaces list when an interface is removed via ieee80211_if_remove(), before it unregisters the netdev. However, it's possible for a netdev to be unregistered without going through that: When the netns that holds the wiphy is destroyed, the wiphy is supposed to move to the init_ns, but that can run into allocation failures. Then, mac80211 has an interface listed that doesn't exist, and will eventually hit BUG: failure at net/wireless/core.h:141/wiphy_to_rdev()! ... _cfg80211_unregister_wdev+0x24/0x36a [cfg80211] cfg80211_unregister_wdev+0x15/0x1d [cfg80211] ieee80211_remove_interfaces+0x1ff/0x257 [mac80211] ieee80211_unregister_hw+0x73/0x1d1 [mac80211] mac80211_hwsim_del_radio+0x114/0x166 [mac80211_hwsim] Remove the interface from the list in ->ndo_uninit if it's still around to avoid this.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/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 463d018323851a608eef52a9427b0585005c647f ~ a22c02863439993095acd0c3db97fa53cd515f4f -
Linux Linux 2.6.32 -

II. Public POCs for CVE-2026-98331

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III. Intelligence Information for CVE-2026-98331

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Patches & Fixes for CVE-2026-98331 (6)

Same Patch Batch · Linux · 2026-10-06 · 208 CVEs total

CVE-2026-98323 9.8 CRITICAL RDMA/siw: Bound fragmented header copies by the remaining length
CVE-2026-98365 9.8 CRITICAL RDMA/rxe: Fix integer overflow in mr_check_range() leading to OOB access
CVE-2026-98282 8.8 HIGH powerpc/iommu: Fix the overflow validation in iommu_tce_check_ioba
CVE-2026-98283 8.8 HIGH KVM: PPC: Book3S HV: fix use-after-free in kvmhv_emulate_tlbie_all_lpid()
CVE-2026-98339 8.8 HIGH wifi: cfg80211: don't filter by BSS type when removing stale entries
CVE-2026-98171 8.8 HIGH smb: client: fix next_buffer UAF and NextCommand bounds in compound PDUs
CVE-2026-98261 8.1 HIGH cifs: Fix server use-after-free in cifs_chan_skip_or_disable()
CVE-2026-98357 8.1 HIGH IB/isert: wait for deferred control PDU completions before releasing the connection
CVE-2026-98239 8.1 HIGH net: lan743x: fix RX checksum use-after-free
CVE-2026-98341 7.8 HIGH wifi: cfg80211: don't free driver-owned scan requests
CVE-2026-98281 7.8 HIGH futex: Also allocate private hash on vfork()
CVE-2026-98324 7.8 HIGH dmaengine: pxa: fix double counting of the hw descriptors
CVE-2026-98320 7.8 HIGH netfilter: flowtable: hold reference on ct until flow is released
CVE-2026-98228 7.8 HIGH mips: select CONFIG_WEAK_REORDERING_BEYOND_LLSC from CONFIG_EYEQ
CVE-2026-98229 7.8 HIGH xfrm: save input state data before secpath resets
CVE-2026-98318 7.8 HIGH smb: client: validate absolute native symlink targets before NT fixups
CVE-2026-98315 7.8 HIGH ntfs: protect runlist updates with the runlist lock
CVE-2026-98260 7.8 HIGH exec: Cleanup POSIX timers right after de_thread()
CVE-2026-98256 7.8 HIGH signal: Prevent exec() race
CVE-2026-98258 7.8 HIGH posix-cpu-timers: Prevent freeing a timer which is queued on the expiry list

Showing top 20 of 208 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-98331

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