CVE-2026-98708Hinoki check available

Invalid memory access via premature channel-context freeing

Published Oct 18, 2026 · Updated Oct 18, 2026

Use-after-free in Linux mac80211 allows attackers to cause invalid kernel memory access during Wi-Fi channel-context replacement. The release and reassignment paths free an old channel context while its replacement retains a replace_ctx pointer, which later unreserve or switch-finalization paths follow. Triggering requires paired channel contexts; attacker privileges, an external entry point, and consequences beyond stale-pointer access are not disclosed.

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

What happened

Use-after-free in Linux mac80211 allows attackers to cause invalid kernel memory access during Wi-Fi channel-context replacement. The release and reassignment paths free an old channel context while its replacement retains a replace_ctx pointer, which later unreserve or switch-finalization paths follow. Triggering requires paired channel contexts; attacker privileges, an external entry point, and consequences beyond stale-pointer access are not disclosed.

The record

CVE
CVE-2026-98708
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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.17
  2. Affected versionversion=5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f <1c82d0c5d509179ba2a4edfa096f516aebf960b0
  3. Affected versionversion=5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f <21a688cbeae0e682f03e91f1e7a7eedd60d9d4f2
  4. Affected versionversion=5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f <3412e9a800786d1dec4a58367db1cba275e7ef11
  5. Affected versionversion=5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f <afd1cdd16a25c7185b812a612ab7d5f2cbd1e086

What conditions does exploitation require?

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

What is affected?

The Linux Kernel Organization · Linuxversion=3.17; version=5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f <1c82d0c5d509179ba2a4edfa096f516aebf960b0; version=5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f <21a688cbeae0e682f03e91f1e7a7eedd60d9d4f2; version=5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f <3412e9a800786d1dec4a58367db1cba275e7ef11; version=5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f <afd1cdd16a25c7185b812a612ab7d5f2cbd1e086

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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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