CVE-2026-98339: high-severity vulnerability in Linux
wifi: cfg80211: don't filter by BSS type when removing stale entries
Published · Updated
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.8epss 0.3%
exploitation probability
0.3%top 81% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Linux · LinuxRelated CVEs — Linux
In the same product, most dangerous first.
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References
https://git.kernel.org/stable/c/0aa44982125c86b47961be5ac1c82eddab8080f3https://git.kernel.org/stable/c/1380ee3a202dbb9f8e8b3c3b87eb410450d57799https://git.kernel.org/stable/c/64e23a36d8f04811372365b44cfca325f8e0f4bbhttps://git.kernel.org/stable/c/65fdb973bd905bc3f5cb045a04c1828f2d2a7e24https://git.kernel.org/stable/c/6d2fd26185678038ef2ea11dd4d2e6eccbf2dd25https://git.kernel.org/stable/c/6ef87a853327434ae1cd9c5a2c27a557fb4047fchttps://git.kernel.org/stable/c/b377e1000d963e7182a987082b4b06580bd7ac84https://git.kernel.org/stable/c/fb445ec7480da5d2b82bf681e3b4313603722729