VulnerabilityPublished 18 Oct 2026

CVE-2026-98462: Linux kernel · Bluetooth: hci_conn: fix CIS hold ownership on reuse

Source GCVE Database

Authoritative record:CVE-2026-98462· Low

Not known to be exploited · fixed in e06d549fcd4a0ba381ed67ddf1ab3c7a6ca4314c : update Linux kernel when convenient.

Data as of 26 Oct 2026, 17:16 UTC

Severity

Low

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in e06d549fcd4a0ba381ed67ddf1ab3c7a6ca4314c, 947eb2f41f70d371eb16897ee4e8e32bff73b476, 072bc8659f22566083f8eef7dc5903bbcaf7804a +2

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-2fvm-fm9j-6jqx

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 69997d50ec574be816b4ee8f9cee52ebbd53f8bd, < e06d549fcd4a0ba381ed67ddf1ab3c7a6ca4314c	Fixed in e06d549fcd4a0ba381ed67ddf1ab3c7a6ca4314c
LinuxLinux	Affected ≥ 69997d50ec574be816b4ee8f9cee52ebbd53f8bd, < 947eb2f41f70d371eb16897ee4e8e32bff73b476	Fixed in 947eb2f41f70d371eb16897ee4e8e32bff73b476
LinuxLinux	Affected ≥ 69997d50ec574be816b4ee8f9cee52ebbd53f8bd, < 072bc8659f22566083f8eef7dc5903bbcaf7804a	Fixed in 072bc8659f22566083f8eef7dc5903bbcaf7804a
LinuxLinux	Affected ≥ 69997d50ec574be816b4ee8f9cee52ebbd53f8bd, < 10f959cb435217b4b407864e5be0eb779e389490	Fixed in 10f959cb435217b4b407864e5be0eb779e389490
LinuxLinux	Affected ≥ 69997d50ec574be816b4ee8f9cee52ebbd53f8bd, < 3ff5a8d949e3a2a435d0a5ee05074cd371b0158a	Fixed in 3ff5a8d949e3a2a435d0a5ee05074cd371b0158a
LinuxLinux	Affected =6.6	Fixed in–

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AI-suggested

A fix has been implemented in the Linux kernel to correct CIS hold ownership handling. Users and administrators should update to the fixed kernel version once available. Since this is a kernel-level Bluetooth subsystem fix, applying the official kernel update from the Linux distribution vendor is the recommended remediation.

Description

A vulnerability in the Linux kernel's Bluetooth subsystem related to CIS (Connected Isochronous Stream) ownership handling has been resolved. The issue involved improper management of connection holds during reuse, which could lead to inconsistent state handling in Bluetooth ISO layer connections.

Impact

The impact involves potential inconsistencies in Bluetooth ISO layer connection state management within the Linux kernel. While the exact exploitation impact is not detailed, improper hold management could lead to unstable Bluetooth connections or resource mismanagement. There is no indication of active exploitation in the wild or direct security compromise such as privilege escalation or remote code execution.

Summary

The vulnerability in the Linux kernel Bluetooth subsystem was due to incorrect handling of CIS hold ownership on reuse. Specifically, the functions hci_bind_cis() and hci_connect_cis() did not consistently manage connection holds, sometimes returning connections without the expected ownership hold or dropping holds prematurely. This could cause state inconsistencies in the Bluetooth ISO layer. The fix ensures that holds are taken before any state-dependent return or error, maintaining the documented ownership contract and balancing hold drops correctly. Additionally, hci_connect_cis() was corrected to preserve CIS holds properly when reusing existing links, avoiding redundant holds and state regressions.

References

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