What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-28 · updated 2026-10-16

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.

Affected products

• Linux kernel: from 6.11.11 before 6.12; from 6.12.2 before 6.13; 6.13 — fixed in 6.12, 6.13, 7.2

How to fix

Upgrade to a fixed version: Linux kernel 6.12, 6.13, 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/aa9f7cb2bd3a2be998ceb739fc9a2f986eba43eb
• https://git.kernel.org/stable/c/cdce8af9291d8a1f8916c271de029bf558d9e8ec
• https://git.kernel.org/stable/c/e941799c31f68e67ce0976efb38a79101f921b64

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