Bluetooth: ISO: ensure no dangling hcon references in iso_conn (CVE-2026-80721) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-80721

Bluetooth: ISO: ensure no dangling hcon references in iso_conn

Answer in brief

CVE-2026-80721 records a Unknown severity vulnerability in Bluetooth: ISO: ensure no dangling hcon references in iso_conn. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 28, 2026Updated Aug 28, 2026Source checked Aug 28, 2026First seen by HOL Aug 28, 2026Material review Aug 28, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e941799c31f68e67ce0976efb38a79101f921b64 \|\| >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cdce8af9291d8a1f8916c271de029bf558d9e8ec \|\| >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <aa9f7cb2bd3a2be998ceb739fc9a2f986eba43eb \|\| >=0 <6.18.44 \|\| >=0 <7.1.8	e941799c31f68e67ce0976efb38a79101f921b64, cdce8af9291d8a1f8916c271de029bf558d9e8ec, aa9f7cb2bd3a2be998ceb739fc9a2f986eba43eb, 6.18.44, 7.1.8

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux.
Review the reported fix. Update Linux/Linux to e941799c31f68e67ce0976efb38a79101f921b64 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 28, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: ensure no dangling hcon references in iso_conn After iso_conn_del(), ISO sockets should not dereference the hcon any more. Currently, clearing iso_conn::hcon relies on iso_conn_del() releasing the last reference to the iso_conn. Simplify this by explicitly clearing conn->hcon in iso_conn_del(), to avoid more complex reasoning on races about who holds the last reference.

Quoted source text, attributed separately from HOL analysis.