CVE-2026-98700

Kernel panic via incorrect transmit-band selection

Published Oct 18, 2026 · Updated Oct 18, 2026

Incorrect band selection in Linux mac80211 allows attackers to crash the kernel during offloaded Wi-Fi frame transmission. In net/mac80211/tx.c, ieee80211_8023_xmit() leaves info->band at zero on non-MLD interfaces instead of copying the channel context, causing ieee80211_get_tx_rates() to select the wrong band. The documented failure requires hardware encapsulation offload and a rate-control fallback during roaming on an affected wireless configuration, producing a kernel panic rather than demonstrated code execution.

CVSS severityUnavailable
Unscored
EPSS probability0.17%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect band selection in Linux mac80211 allows attackers to crash the kernel during offloaded Wi-Fi frame transmission. In net/mac80211/tx.c, ieee80211_8023_xmit() leaves info->band at zero on non-MLD interfaces instead of copying the channel context, causing ieee80211_get_tx_rates() to select the wrong band. The documented failure requires hardware encapsulation offload and a rate-control fallback during roaming on an affected wireless configuration, producing a kernel panic rather than demonstrated code execution.

The record

CVE
CVE-2026-98700
Published
Oct 18, 2026
Updated
Oct 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=50ff477a8639fa1fbbeecb5a6f2f8b6c5557ecec <2d9c5525bbc1a548cdc9c4def3cd7fbfc7c66b5b
  2. Affected versionversion=50ff477a8639fa1fbbeecb5a6f2f8b6c5557ecec <4febc02cd02f021f2b6d0768332be643ef14a12d
  3. Affected versionversion=50ff477a8639fa1fbbeecb5a6f2f8b6c5557ecec <93c1b247224a32f546b616a8fe87b9bab20f0a7f
  4. Affected versionversion=50ff477a8639fa1fbbeecb5a6f2f8b6c5557ecec <9cedbfde1450028f530e9af950f53491fcaebfeb
  5. Affected versionversion=5.7

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=50ff477a8639fa1fbbeecb5a6f2f8b6c5557ecec <2d9c5525bbc1a548cdc9c4def3cd7fbfc7c66b5b; version=50ff477a8639fa1fbbeecb5a6f2f8b6c5557ecec <4febc02cd02f021f2b6d0768332be643ef14a12d; version=50ff477a8639fa1fbbeecb5a6f2f8b6c5557ecec <93c1b247224a32f546b616a8fe87b9bab20f0a7f; version=50ff477a8639fa1fbbeecb5a6f2f8b6c5557ecec <9cedbfde1450028f530e9af950f53491fcaebfeb; version=5.7

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

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No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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