In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: set info->band for 802.3 encap offload frames Unlike the 802.11… (CVE-2026-98700)
Description
A vulnerability in the Linux kernel's mac80211 wifi subsystem was resolved by ensuring the correct band information is set for 802.3 encapsulation offload frames. Previously, the function ieee80211_8023_xmit() did not set the info->band field correctly on non-MLD interfaces, causing the transmission rate selection to use an incorrect band. The fix aligns this behavior with ieee80211_build_hdr() by dropping frames without a channel context and leaving the band at 0 on MLD interfaces.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel's mac80211 wifi component had a flaw where the info->band field was not set properly for 802.3 encapsulation offload frames on non-MLD interfaces. This caused ieee80211_get_tx_rates() to select transmission rates based on an incorrect band, potentially affecting wifi frame transmission behavior. The patch ensures info->band is set from the channel context or frames are dropped if no context exists, matching the behavior of ieee80211_build_hdr().
Potential Impact
The incorrect band setting could lead to improper transmission rate selection for certain wifi frames, potentially degrading wifi performance or causing transmission issues. There is no indication of direct security exploitation or impact on confidentiality, integrity, or availability beyond transmission correctness.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to correctly set info->band for 802.3 encapsulation offload frames. Users should apply the official kernel update that includes this patch. No additional mitigation steps are indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-5cc8-qw42-jp7f
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-98700"]
Threat ID: 6ad520ac2cdf04f656993a26
Added to database: 10/18/2026, 19:40:28 UTC
Last enriched: 10/18/2026, 22:27:34 UTC
Last updated: 10/19/2026, 01:48:09 UTC
Views: 5
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