CVE-2026-98339Public exploit

Conditional kernel panic via stale BSS collision

Published Oct 6, 2026 · Updated Oct 6, 2026

Wi-Fi BSS handling in Linux allows physically proximate attackers operating a rogue access point to trigger a kernel warning during a channel switch. In cfg80211_update_assoc_bss_entry(), a BSS-type filter leaves a conflicting stale entry in the tree before cfg80211_rehash_bss() encounters it. The warning becomes a kernel panic only on hosts configured to panic on warnings; no data access or code execution is established.

CVSS severityUnavailable
Unscored
EPSS probability0.29%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Wi-Fi BSS handling in Linux allows physically proximate attackers operating a rogue access point to trigger a kernel warning during a channel switch. In cfg80211_update_assoc_bss_entry(), a BSS-type filter leaves a conflicting stale entry in the tree before cfg80211_rehash_bss() encounters it. The warning becomes a kernel panic only on hosts configured to panic on warnings; no data access or code execution is established.

The record

CVE
CVE-2026-98339
Published
Oct 6, 2026
Updated
Oct 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=0afd425b1b64251f19b5d8d8b49bf56fefbc643f <0aa44982125c86b47961be5ac1c82eddab8080f3
  2. Affected versionversion=0afd425b1b64251f19b5d8d8b49bf56fefbc643f <1380ee3a202dbb9f8e8b3c3b87eb410450d57799
  3. Affected versionversion=0afd425b1b64251f19b5d8d8b49bf56fefbc643f <64e23a36d8f04811372365b44cfca325f8e0f4bb
  4. Affected versionversion=0afd425b1b64251f19b5d8d8b49bf56fefbc643f <65fdb973bd905bc3f5cb045a04c1828f2d2a7e24
  5. Affected versionversion=0afd425b1b64251f19b5d8d8b49bf56fefbc643f <6d2fd26185678038ef2ea11dd4d2e6eccbf2dd25
  6. Affected versionversion=0afd425b1b64251f19b5d8d8b49bf56fefbc643f <6ef87a853327434ae1cd9c5a2c27a557fb4047fc
  7. Affected versionversion=0afd425b1b64251f19b5d8d8b49bf56fefbc643f <b377e1000d963e7182a987082b4b06580bd7ac84
  8. Affected versionversion=0afd425b1b64251f19b5d8d8b49bf56fefbc643f <fb445ec7480da5d2b82bf681e3b4313603722729
  9. Affected versionversion=5.4

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=0afd425b1b64251f19b5d8d8b49bf56fefbc643f <0aa44982125c86b47961be5ac1c82eddab8080f3; version=0afd425b1b64251f19b5d8d8b49bf56fefbc643f <1380ee3a202dbb9f8e8b3c3b87eb410450d57799; version=0afd425b1b64251f19b5d8d8b49bf56fefbc643f <64e23a36d8f04811372365b44cfca325f8e0f4bb; version=0afd425b1b64251f19b5d8d8b49bf56fefbc643f <65fdb973bd905bc3f5cb045a04c1828f2d2a7e24; version=0afd425b1b64251f19b5d8d8b49bf56fefbc643f <6d2fd26185678038ef2ea11dd4d2e6eccbf2dd25; version=0afd425b1b64251f19b5d8d8b49bf56fefbc643f <6ef87a853327434ae1cd9c5a2c27a557fb4047fc; version=0afd425b1b64251f19b5d8d8b49bf56fefbc643f <b377e1000d963e7182a987082b4b06580bd7ac84; version=0afd425b1b64251f19b5d8d8b49bf56fefbc643f <fb445ec7480da5d2b82bf681e3b4313603722729; version=5.4

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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

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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