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Back to active CVEs
High · CVSS 8.8CVE-2026-80721

Bluetooth: ISO: ensure no dangling hcon references in iso_connCVE-2026-80721

Answer in brief

CVE-2026-80721 records a High severity (CVSS 8.8) 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), Linux/Linux (generic), 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 30, 2026Source checked Oct 12, 2026First seen by HOL Aug 28, 2026Material review Aug 30, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.8
Exploitation
Not marked as known exploited
Affected software
3 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 8.8. 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), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e941799c31f68e67ce0976efb38a79101f921b64 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cdce8af9291d8a1f8916c271de029bf558d9e8ec || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <aa9f7cb2bd3a2be998ceb739fc9a2f986eba43eb || >=0 <6.18.44 || >=0 <7.1.8e941799c31f68e67ce0976efb38a79101f921b64, cdce8af9291d8a1f8916c271de029bf558d9e8ec, aa9f7cb2bd3a2be998ceb739fc9a2f986eba43eb, 6.18.44, 7.1.8
Linux/Linuxgeneric>=dc26097bdb864a0d5955b9a25e43376ffc1af99b <e941799c31f68e67ce0976efb38a79101f921b64 || >=dc26097bdb864a0d5955b9a25e43376ffc1af99b <cdce8af9291d8a1f8916c271de029bf558d9e8ec || >=dc26097bdb864a0d5955b9a25e43376ffc1af99b <aa9f7cb2bd3a2be998ceb739fc9a2f986eba43eb || f53e7489273dc2bb307bf50f319b3762d45534f0 || a58d0f5dac322e16cc75334d000666512341bde5 || >=6.11.11 <6.12 || >=6.12.2 <6.13e941799c31f68e67ce0976efb38a79101f921b64, cdce8af9291d8a1f8916c271de029bf558d9e8ec, aa9f7cb2bd3a2be998ceb739fc9a2f986eba43eb, 6.12, 6.13
Linux/Linuxgeneric6.13Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to e941799c31f68e67ce0976efb38a79101f921b64; Linux/Linux to e941799c31f68e67ce0976efb38a79101f921b64 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Aug 28, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Aug 30, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 28, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
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.

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Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
CVE List V5
Source checked
Oct 12, 2026
References
3 linked sources
Open source record