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CVE-2026-98334— wifi: mac80211: reset state when starting AP fails

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: 在启动 AP 失败时重置状态 函数可能会设置 （以及 ），但随后在后续步骤中失败，导致这些状态被永久保留。之后，扫描过程可能会尝试在此类接口上恢复信标（beacon）发送，从而引发以下问题： 该错误出现在 中。此外， 随后允许更改接口类型，而通道外（off-channel）路径在对信标状态的判断上也会产生混乱，进而引发另一条警告信息： 因此，在启动失败时重置状态，以确保状态始终正确。

AI Predicted 5.5 Difficulty: Hard EPSS 0.18% · P6

Possible ATT&CK Techniques 1 AI

T1562.001

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux d6a83228823fc0cc8d79d95c9f0bf568b7317862< d83da43e9b3b3b1bad99ac5a1065f1c63ad5fc32 affected
d6a83228823fc0cc8d79d95c9f0bf568b7317862< 5d5ff5b36f5748a2a077f875a73ccb26860d3fcc affected
d6a83228823fc0cc8d79d95c9f0bf568b7317862< 6eac225f59c1c2277ac74f8a716d6df0ba3b8d28 affected
d6a83228823fc0cc8d79d95c9f0bf568b7317862< 3f28551d0241254a75626d868041c6340285088b affected
3.9 affected
< 3.9 unaffected
6.12.112≤ 6.12.* unaffected
6.18.54≤ 6.18.* unaffected
… +2 more rows
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I. Basic Information for CVE-2026-98334

Vulnerability Information
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Vulnerability Title
wifi: mac80211: reset state when starting AP fails
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: reset state when starting AP fails ieee80211_start_ap() can set enable_beacon (and beacon_int) and fail later, leaving it set forever. Scanning can then attempt to restore beaconing on such an interface, leading to: Oops: divide error: 0000 [#1] SMP KASAN NOPTI RIP: 0010:mac80211_hwsim_link_info_changed+0xca7/0xf00 Call Trace: drv_link_info_changed+0x413/0x860 net/mac80211/driver-ops.c:495 ieee80211_link_info_change_notify+0x24b/0x3c0 net/mac80211/main.c:427 ieee80211_offchannel_return+0x381/0x580 net/mac80211/offchannel.c:160 __ieee80211_scan_completed+0x993/0xe30 net/mac80211/scan.c:519 ieee80211_scan_work+0x472/0x2010 net/mac80211/scan.c:1193 cfg80211_wiphy_work+0x2b7/0x550 net/wireless/core.c:538 in hwsim. Also, cfg80211 then allows changing the interface type, and the off-channel path getgs confused about beaconing as well, leading to another warning: WARNING: net/mac80211/driver-ops.c:468 at drv_link_info_changed+0x583/0x880 ieee80211_link_info_change_notify+0x24b/0x3c0 net/mac80211/main.c:427 ieee80211_offchannel_stop_vifs+0x328/0x5c0 net/mac80211/offchannel.c:122 ieee80211_start_sw_scan net/mac80211/scan.c:583 [inline] __ieee80211_start_scan+0xfb6/0x1af0 net/mac80211/scan.c:882 Reset the state on failures to always have it correct.
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 d6a83228823fc0cc8d79d95c9f0bf568b7317862 ~ d83da43e9b3b3b1bad99ac5a1065f1c63ad5fc32 -
Linux Linux 3.9 -

II. Public POCs for CVE-2026-98334

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III. Intelligence Information for CVE-2026-98334

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Patches & Fixes for CVE-2026-98334 (4)

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-2026-98334

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