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Linux CVE-2026-98456

| EUVDEUVD-2026-103696
2026-10-18 Linux GHSA-79jp-j4mv-p57c
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Awaiting Data No severity or threat signals available yet. Label will update when CVSS score is published or threat intelligence arrives.
Patch available

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AnalysisCVE.org

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: mgmt: fix race in read_unconf_index_list()

read_unconf_index_list() counts unconfigured controllers before allocating its response, then checks the device flags again while filling it.

hci_dev_list_lock stabilizes list membership, but it does not serialize the per-device flags. During asynchronous controller setup, the worker can set HCI_UNCONFIGURED and clear HCI_SETUP between the two passes. A controller omitted from the allocation count can then become eligible for the fill pass, causing an out-of-bounds write to rp->index[].

Allocate space for every device on hci_dev_list. Since list membership cannot change while hci_dev_list_lock is held, the response remains large enough regardless of flag transitions. The reported count and response length still include only eligible unconfigured controllers.

Affected VersionsENISA

Linux patch: 6.6.158
Linux patch: 7.3-rc5
Linux 73d1df2a7a1036a1f000e5f0ece6ade3e082b854 <416546cd6a54e9b68f2b91bc680b1ee17dcd77a1
Linux patch: 7.2.9
Linux 3.17
Linux patch: 6.18.55
Linux 73d1df2a7a1036a1f000e5f0ece6ade3e082b854 <8ddf962c76432a10a6cb80042875cbc48a9c056b
Linux 73d1df2a7a1036a1f000e5f0ece6ade3e082b854 <524e0450dd9a396f99a81b045219b0e2ea0dab57
Linux 73d1df2a7a1036a1f000e5f0ece6ade3e082b854 <2e8bba0360d1379bfa8da47c8f5dadbb10a3fba1
Linux patch: 0
Linux patch: 6.12.112
Linux 73d1df2a7a1036a1f000e5f0ece6ade3e082b854 <b5dbb41b212c50c095a4dbee3017a84fe94f033b

Affected Packages

euvd linux no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

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Lifecycle Timeline

2
Patch available
Oct 18, 2026 - 16:02 EUVD
CVE Published
Oct 18, 2026 - 15:15 cve.org
UNKNOWN (no severity yet)

Threat Intelligence Overview

Data Quality
1 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity Not scored yet
CISA KEV No
Public POC No
EPSS N/A
Patch available Yes
Active threat No
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.
Awaiting Data No severity or threat signals available yet. Label will update when CVSS score is published or threat intelligence arrives.

Attack Technique

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

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