CVE-2026-98459Hinoki check available

Socket disconnection via unbalanced parent hold

Published Oct 18, 2026 · Updated Oct 18, 2026

Reference mismanagement in Linux Bluetooth ISO allows attackers to disconnect an active socket via additional BIS connections. The hci_bind_bis() function links a parent obtained from hci_conn_hash_lookup_big() without acquiring an operational hold, so child unlinking drops the active parent's existing hold. This requires an additional Broadcast Isochronous Stream sharing a parent connection; the documented consequence is premature disconnection, with attacker privileges and remote reachability unspecified.

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

Reference mismanagement in Linux Bluetooth ISO allows attackers to disconnect an active socket via additional BIS connections. The hci_bind_bis() function links a parent obtained from hci_conn_hash_lookup_big() without acquiring an operational hold, so child unlinking drops the active parent's existing hold. This requires an additional Broadcast Isochronous Stream sharing a parent connection; the documented consequence is premature disconnection, with attacker privileges and remote reachability unspecified.

The record

CVE
CVE-2026-98459
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=11dc486ed5d4626e6b92a23b67ed76cb6c48bfc9 <ff28e6c67143c76ef50c3eac01f2fad411705f71
  2. Affected versionversion=6.6.67 <6.6.158
  3. Affected versionversion=6.8
  4. Affected versionversion=fa224d0c094a458e9ebf5ea9b1c696136b7af427 <03a91cdf6862fb351a74f035ad21e70112438552
  5. Affected versionversion=fa224d0c094a458e9ebf5ea9b1c696136b7af427 <4c94557dd02569efa6c1072a0439addaef9a5224
  6. Affected versionversion=fa224d0c094a458e9ebf5ea9b1c696136b7af427 <4e49206d9574a4c109480198e73aea34ad0ed7f6
  7. Affected versionversion=fa224d0c094a458e9ebf5ea9b1c696136b7af427 <bbcd723ee7a84bc868142fd57717af88e54e555a

What conditions does exploitation require?

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

What is affected?

The Linux Kernel Organization · Linuxversion=11dc486ed5d4626e6b92a23b67ed76cb6c48bfc9 <ff28e6c67143c76ef50c3eac01f2fad411705f71; version=6.6.67 <6.6.158; version=6.8; version=fa224d0c094a458e9ebf5ea9b1c696136b7af427 <03a91cdf6862fb351a74f035ad21e70112438552; version=fa224d0c094a458e9ebf5ea9b1c696136b7af427 <4c94557dd02569efa6c1072a0439addaef9a5224; version=fa224d0c094a458e9ebf5ea9b1c696136b7af427 <4e49206d9574a4c109480198e73aea34ad0ed7f6; version=fa224d0c094a458e9ebf5ea9b1c696136b7af427 <bbcd723ee7a84bc868142fd57717af88e54e555a

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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