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CVE-2026-98421— wifi: mac80211: require a peer station for TDLS setup confirm

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: 要求 TDLS 建立确认必须针对存在的对等站（peer station） 向一个根本不存在的站点发送建立确认（setup confirm）是没有意义的，并且在构建帧时会触发警告： 仅在目标站点已经作为 TDLS 站点存在时，才接受 消息。需要复制对 的调用，因为现有的 已经会落入该函数处理。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 6f7eaa47e1de30159277f91f1145a6687f13ffd9< 6bae6ef511a29ef12ab969adeea691067d4d5d74 affected
6f7eaa47e1de30159277f91f1145a6687f13ffd9< d0afa5395c46d73ad2090aa50209886e84f179bd affected
6f7eaa47e1de30159277f91f1145a6687f13ffd9< 742c762bee59c973684f70dfed7de4945d3141e2 affected
6f7eaa47e1de30159277f91f1145a6687f13ffd9< fce36d242a18ddf64731d816a37564103172da11 affected
6f7eaa47e1de30159277f91f1145a6687f13ffd9< 1c0a5c96473b9e7a5f4c453ef6a13dc0f5589a4b affected
6f7eaa47e1de30159277f91f1145a6687f13ffd9< 038e1d126304fd25d507fd4e671232df57bd1799 affected
3.17 affected
< 3.17 unaffected
… +6 more rows
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I. Basic Information for CVE-2026-98421

Vulnerability Information
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Vulnerability Title
wifi: mac80211: require a peer station for TDLS setup confirm
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: require a peer station for TDLS setup confirm It's nonsense for the setup confirm to go to station that doesn't even exist, and it hits a warning when building the frame: WARN_ON_ONCE(!sta || !ap_sta) Only accept WLAN_TDLS_SETUP_CONFIRM when the station is already there as a TDLS station. Need to copy the call to ieee80211_tdls_prep_mgmt_packet() since the existing WLAN_TDLS_DISCOVERY_REQUEST already falls through to it.
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 6f7eaa47e1de30159277f91f1145a6687f13ffd9 ~ 6bae6ef511a29ef12ab969adeea691067d4d5d74 -
Linux Linux 3.17 -

II. Public POCs for CVE-2026-98421

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III. Intelligence Information for CVE-2026-98421

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Other References for CVE-2026-98421 (6)

Same Patch Batch · Linux · 2026-10-14 · 46 CVEs total

CVE-2026-98398 locking/lockdep: Invalidate stale class_cache entries for zapped classes
CVE-2026-98396 powerpc: Do not restore KUAP in arch_exit_to_user_mode_prepare()
CVE-2026-98393 net: ipv4: Fix UDP length overflow with PMTU discover and big MTU
CVE-2026-98391 drm/xe: Guard page-fault worker with runtime PM check
CVE-2026-98389 drm/amdgpu: skip gfx switch_power_profile during GPU reset
CVE-2026-98388 exec: do_close_on_exec() before taking exec_update_lock
CVE-2026-98387 s390/crypto: Fix skcipher_walk return code handling in aes_s390
CVE-2026-98386 scsi: qla2xxx: Use memset_io() to clear QLAFX00 request ring slot
CVE-2026-98390 x86/amd_node: Avoid divide by zero on virtualized systems
CVE-2026-98397 platform/x86: x86-android-tablets: hold device reference for secondary fwnode teardown
CVE-2026-98395 powerpc/entry: Fix irq_soft_mask corruption on replayed interrupt exit
CVE-2026-98399 s390/ipl: Fix NULL deref in dump_reipl without re-IPL parm block
CVE-2026-98400 s390/ipl: Fix NULL deref in kdump without re-IPL parm block
CVE-2026-98402 net: icmp: avoid invalid transport header access in icmp_send tracepoint
CVE-2026-98401 net: iptunnel: fix stale transport header during tunnel decapsulation
CVE-2026-98403 s390/boot: Avoid IPL parameter append past command line
CVE-2026-98404 drm/virtio: Fix a NULL vs ERR_PTR() bug in virtio_gpu_user_framebuffer_create()
CVE-2026-98405 smb: client: fix missing iov bounds check in parse_posix_sids()
CVE-2026-98406 wifi: mac80211: avoid WARN in set_bitrate_mask when sdata not in driver
CVE-2026-98408 watchdog: rzv2h: Avoid division by zero

Showing top 20 of 46 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-98421

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