CVE-2026-72334

HighCVSS 8.8/10Last modified Oct 16, 2026

Description

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

Bluetooth: ISO: fix malformed ISO_END/CONT handling

Core specification (Part C vol 4 sec 5.4.5) does not exclude empty ISO_CONT, ISO_END packets. We currently reject them if they are last.

If controller sends malformed sequence

ISO_START -> rx_len = 4, ISO_CONT skb->len 4, ISO_START

that ends payload in ISO_CONT, we leak conn->rx_skb. If controller sends too long ISO_END, we panic on skb_put. If controller sends too short ISO_END we accept it.

Fix by marking unfinished ISO_START via conn->rx_skb != NULL. Check skb->len properly before skb_put. Combine the ISO_CONT/END code paths as they require the same initial checks. Reject too short ISO_END packets.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

VendorProductVersions
LinuxLinux>= ccf74f2390d60a2f9a75ef496d2564abb478f46a, < d2df29dc9abda2fc10ff522eac0969f5b77b3637; >= ccf74f2390d60a2f9a75ef496d2564abb478f46a, < 7250b6b5ba9b737cff2c2c1d0760360c7b6bca00; >= ccf74f2390d60a2f9a75ef496d2564abb478f46a, < 49aeb54e3c912ef785311264a51ab9f3698e421b; >= ccf74f2390d60a2f9a75ef496d2564abb478f46a, < 5e53e285f8c989662e34d4938c728a94226bff34; >= ccf74f2390d60a2f9a75ef496d2564abb478f46a, < 990e65eb9387c4ddfa7f68782b6644c2c35d489f; >= ccf74f2390d60a2f9a75ef496d2564abb478f46a, < e054c1a6ae7310d2815778fddb87da616e11c255
LinuxLinux6.0

References

Timeline

Published
Aug 15, 2026
Last modified
Oct 16, 2026
NVD status
Received

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CVE-2026-72334: High severity, CVSS 8.8 | Vulnix