VulnerabilityPublished 18 Oct 2026

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

Affects Linux kernelSource CVE Database V5

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 Low by Threat Radar's AI analysis · 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.

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–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available and has been applied in the Linux kernel. Users and administrators should update to the fixed kernel versions containing the relevant patches identified by commit hashes e06d549fcd4a0ba381ed67ddf1ab3c7a6ca4314c, 947eb2f41f70d371eb16897ee4e8e32bff73b476, 072bc8659f22566083f8eef7dc5903bbcaf7804a, 10f959cb435217b4b407864e5be0eb779e389490, and 3ff5a8d949e3a2a435d0a5ee05074cd371b0158a to remediate this issue.

Description

A vulnerability in the Linux kernel Bluetooth subsystem related to CIS (Connected Isochronous Stream) hold ownership on reuse has been fixed. The issue involved improper handling of connection holds in functions hci_bind_cis() and hci_connect_cis(), which could lead to inconsistent state management during CIS configuration and reuse. The fix ensures proper hold acquisition and release to maintain documented ownership contracts and prevent state inconsistencies.

Impact

The vulnerability could cause improper management of connection holds in the Bluetooth ISO layer, potentially leading to inconsistent connection states or resource mismanagement within the Linux kernel Bluetooth stack. No direct exploitation or active exploits are known. The impact is primarily internal to the kernel's Bluetooth connection management and could affect stability or reliability of Bluetooth CIS connections.

Summary

The Linux kernel Bluetooth subsystem had a flaw in the handling of CIS hold ownership during reuse. Specifically, after commit 69997d50ec57, hci_bind_cis() and hci_connect_cis() returned connections with one hold for the ISO layer, but hci_bind_cis() only took that hold after configuring a CIS, causing some return paths to provide a bare lookup result without the expected hold. Additionally, hci_connect_cis() assumed hci_conn_link() always took a new CIS hold, but it could return an existing link without taking another hold, leading to redundant holds or improper ownership. The patch corrects this by taking holds before any state-dependent returns or errors, preserving CIS holds appropriately, and dropping redundant LE holds to maintain proper ownership and avoid reverting existing CIS states.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 26 Oct 2026, 11:06 UTC

Technical details

References

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