Linux mac80211 offload transmit path leaves frame band unset
Key facts
- Attack vector
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- Privileges required
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- User interaction
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- Attack complexity
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- Impact type
- —
- Confidentiality · integrity · availability
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- Fix status
- Partial Red Hat: 6 without a fix
No CVSS vector from any source. Fix status from CNA and Red Hat.
Summary
The Linux kernel from 5.7 is affected by a flaw in the mac80211 Wi-Fi stack. The 802.3 encapsulation offload transmit path does not set the frame band from the channel context on non-MLD interfaces, so the band stays at 0 and rate selection uses the wrong band. Frames that take this path can get wrong transmit rates.
Written with Claude Haiku 5.5 from the sources below · 2026-11-07
Description from the CNA
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 TX paths, ieee80211_8023_xmit() does not set info->band from the channel context on non-MLD interfaces. It stays at 0, so ieee80211_get_tx_rates() uses the wrong band for these frames. Set it the same way as ieee80211_build_hdr(): drop the frame if there is no channel context, and leave the band at 0 on MLD interfaces.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
Update the Linux kernel to 5.10.273, 5.15.224, 6.1.191, 6.6.160, 6.12.113, 6.18.56, 7.2.10 or 7.3, depending on the branch in use. Red Hat lists Red Hat Enterprise Linux 6 as affected with no fix planned, and Red Hat Enterprise Linux 8, 9, 10, OpenShift Container Platform 4 and OpenShift Container Platform 5 as affected with no fix available.
Written with Claude Haiku 5.5 from the sources below · 2026-11-07
- Fix · CNA Linux (Linux) Fixed in 5.10.273, 5.15.224, 6.1.191, 6.6.160, 6.12.113, 6.18.56, 7.2.10, 7.3
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 5 | Affected | No fix yet: Fix deferred |
Not affected: 1 product
- Red Hat Enterprise Linux 7
Timeline
- 2026-10-18 Threatist record created from CVE-2026-98700
- 2026-10-18 Alias added: GHSA-5cc8-qw42-jp7f
- 2026-10-19 Fix available: Linux/[email protected] · CNA
- 2026-10-21 Fix available: Linux/[email protected], Linux/Linux@6535f7084d95873785a7a93cdca05e8ee83b5601 · CNA
- 2026-10-21 1 new reference · CNA
- 2026-10-23 Affected versions changed · Red Hat
- 2026-10-23 CVSS score added · Red Hat
- 2026-10-30 Fix available: Linux/Linux@3ce62fa18975316547c971cf60c4533077a60c48, Linux/[email protected], Linux/[email protected] +3 · CNA
- 2026-10-30 3 new references · CNA
- 2026-11-07 Affected versions changed · Red Hat
References
Other 8
- https://git.kernel.org/stable/c/a182c0bbb3c0332189f04b241a71455539f58433
- https://git.kernel.org/stable/c/3ce62fa18975316547c971cf60c4533077a60c48
- https://git.kernel.org/stable/c/c85c0d897b91c74c0a2c0d0ad29f1ae970dc1e0d
- https://git.kernel.org/stable/c/6535f7084d95873785a7a93cdca05e8ee83b5601
- https://git.kernel.org/stable/c/93c1b247224a32f546b616a8fe87b9bab20f0a7f
- https://git.kernel.org/stable/c/9cedbfde1450028f530e9af950f53491fcaebfeb
- https://git.kernel.org/stable/c/2d9c5525bbc1a548cdc9c4def3cd7fbfc7c66b5b
- https://git.kernel.org/stable/c/4febc02cd02f021f2b6d0768332be643ef14a12d
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Sources
- CVE-2026-98700 · CVE Program
- CVE-2026-98700 · NVD
- FIRST EPSS
- GHSA-5cc8-qw42-jp7f · GitHub Advisory Database · CC BY 4.0
- CVE-2026-98700 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences