CVE-2026-98704: vulnerability in Linux
wifi: mac80211: keep fallback association elements alive
Published · Updated
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.2%
exploitation probability
0.2%top 94% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211: keep fallback association elements alive
Associating to a non-transmitted MBSSID profile reads freed memory while
determining the operating channel and applying HT capabilities.
When an association response omits WMM, HT, or VHT information,
ieee80211_assoc_config_link() parses the cached BSS IEs and copies the
missing element pointers out of that fallback parse. For a
non-transmitted MBSSID profile those pointers refer to merged-profile
storage owned by the parse object, and the fallback block frees that
object at its end. The copied pointers are used afterwards to determine
the operating channel, configure bandwidth, and apply HT capabilities.
Keep the fallback parse result alive until association setup finishes.
[reorder variable declaration]
Affected products
Linux · LinuxRelated CVEs — Linux
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References
https://git.kernel.org/stable/c/0878594c5806dd29fa5e16cc026ce19158afdad2https://git.kernel.org/stable/c/1d9644753d46c86b4e5c05bd6d9d35339ea27331https://git.kernel.org/stable/c/a10a2f80476d166fd81c361ec0319493671b694ehttps://git.kernel.org/stable/c/d0183cd1f6a2dba9e63be20af2f65093c9c8d121https://git.kernel.org/stable/c/de77b0f68142147e74fac1c497dbe1f93daeeed9