What’s Vulnerable › Vulnerabilities

CVE-2026-74541: Bluetooth: ISO: clear iso_data always when detaching conn from hcon

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-10-16

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: clear iso_data always when detaching conn from hcon When setting conn->hcon = NULL, also conn->hcon->iso_data = NULL is necessary, otherwise later iso_conn_free() will UAF. Fix clearing of iso_data in iso_sock_disconn() Fixes KASAN: slab-use-after-free in iso_conn_hold_unless_zero on iso_sock_release() followed by hci_abort_conn_sync().

Affected products

• Linux kernel: from 6.5.12 before 6.6; 6.6 — fixed in 6.6, 7.2

How to fix

Upgrade to a fixed version: Linux kernel 6.6, 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/63c0f396a18b767eb28e895eb95bbdce6c172c59
• https://git.kernel.org/stable/c/69a4a7b162b3db6ac337e3094cdee38f24d42ff7
• https://git.kernel.org/stable/c/7b51a9c25e9698b64df9f2218f10eecf7dc7e2d0
• https://git.kernel.org/stable/c/cc1d39946d62bc568551dfb81149724de1e91338
• https://git.kernel.org/stable/c/d57e506f6a1e3929611340fae87c1e4823f4d85c

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