CVE-2026-98339 Linux — Exploit & Vulnerability Details HIGH

Parameter	Value
CVSS	8.8 (HIGH)
Affected Versions	5.4 — 7.3-rc4
Fixed In	5.10.271
Vendor	Linux
Public PoC	No

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: don't filter by BSS type when removing stale entries When an assoc AP switches to a channel that already has a BSS entry, cfg80211_update_assoc_bss_entry() removes that entry before rehashing the real one, since the two would otherwise collide in the BSS rbtree. The lookup for that entry also required it to match the connection's BSS type, so an entry advertising e.g. the IBSS capability bit was left in place, and the following cfg80211_rehash_bss() then ran into it: WARN_ON(!cmp) Changing the type shouldn't really happen, but can be triggered by a rogue AP/device, so drop the check and remove any entries matching the comparison.

Attack Parameters

Attack Vector

Adjacent

Requires local network access

Attack Complexity

Low

Easy to exploit

Privileges Required

None

No privileges needed

User Interaction

None

No user interaction needed

Impact Assessment

Confidentiality

High

Complete data leak

Integrity

High

Complete data modification

Availability

High

Complete denial of service

CVSS Vector v3.1

Vulnerable Products 8

Configuration	From (including)	Up to (excluding)
Linux Linux_Kernel cpe:2.3:o:linux:linux_kernel::::::::	`5.4`	`5.10.271`
Linux Linux_Kernel cpe:2.3:o:linux:linux_kernel::::::::	`5.4`	`5.15.222`
Linux Linux_Kernel cpe:2.3:o:linux:linux_kernel::::::::	`5.4`	`6.1.189`
Linux Linux_Kernel cpe:2.3:o:linux:linux_kernel::::::::	`5.4`	`6.6.158`
Linux Linux_Kernel cpe:2.3:o:linux:linux_kernel::::::::	`5.4`	`6.12.112`
Linux Linux_Kernel cpe:2.3:o:linux:linux_kernel::::::::	`5.4`	`6.18.54`
Linux Linux_Kernel cpe:2.3:o:linux:linux_kernel::::::::	`5.4`	`7.2.8`
Linux Linux_Kernel cpe:2.3:o:linux:linux_kernel::::::::	`5.4`	`7.3-rc4`