Linux vulnerability

What happened

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.

Affected versions

Linux: ccf74f2390d60a2f9a75ef496d2564abb478f46a through before d2df29dc9abda2fc10ff522eac0969f5b77b3637 (git); ccf74f2390d60a2f9a75ef496d2564abb478f46a through before 7250b6b5ba9b737cff2c2c1d0760360c7b6bca00 (git); ccf74f2390d60a2f9a75ef496d2564abb478f46a through before 49aeb54e3c912ef785311264a51ab9f3698e421b (git); ccf74f2390d60a2f9a75ef496d2564abb478f46a through before 5e53e285f8c989662e34d4938c728a94226bff34 (git); ccf74f2390d60a2f9a75ef496d2564abb478f46a through before 990e65eb9387c4ddfa7f68782b6644c2c35d489f (git); ccf74f2390d60a2f9a75ef496d2564abb478f46a through before e054c1a6ae7310d2815778fddb87da616e11c255 (git); 6.0 Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

• Apply vendor-provided updates or mitigations.
• Review affected product exposure and access logs.