CVE-2026-98339 is a vulnerability in Linux Kernel
Published on October 6, 2026
wifi: cfg80211: don't filter by BSS type when removing stale entries
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.
Products Associated with CVE-2026-98339
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Affected Versions
Linux:- Version 0afd425b1b64251f19b5d8d8b49bf56fefbc643f and below 6ef87a853327434ae1cd9c5a2c27a557fb4047fc is affected.
- Version 0afd425b1b64251f19b5d8d8b49bf56fefbc643f and below 1380ee3a202dbb9f8e8b3c3b87eb410450d57799 is affected.
- Version 0afd425b1b64251f19b5d8d8b49bf56fefbc643f and below fb445ec7480da5d2b82bf681e3b4313603722729 is affected.
- Version 0afd425b1b64251f19b5d8d8b49bf56fefbc643f and below 65fdb973bd905bc3f5cb045a04c1828f2d2a7e24 is affected.
- Version 0afd425b1b64251f19b5d8d8b49bf56fefbc643f and below 64e23a36d8f04811372365b44cfca325f8e0f4bb is affected.
- Version 0afd425b1b64251f19b5d8d8b49bf56fefbc643f and below 6d2fd26185678038ef2ea11dd4d2e6eccbf2dd25 is affected.
- Version 0afd425b1b64251f19b5d8d8b49bf56fefbc643f and below 0aa44982125c86b47961be5ac1c82eddab8080f3 is affected.
- Version 0afd425b1b64251f19b5d8d8b49bf56fefbc643f and below b377e1000d963e7182a987082b4b06580bd7ac84 is affected.
- Version 5.4 is affected.
- Before 5.4 is unaffected.
- Version 5.10.271, <= 5.10.* is unaffected.
- Version 5.15.222, <= 5.15.* is unaffected.
- Version 6.1.189, <= 6.1.* is unaffected.
- Version 6.6.158, <= 6.6.* is unaffected.
- Version 6.12.112, <= 6.12.* is unaffected.
- Version 6.18.54, <= 6.18.* is unaffected.
- Version 7.2.8, <= 7.2.* is unaffected.
- Version 7.3-rc4, <= * is unaffected.