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.
References6
- git.kernel.org/stable/c/49aeb54e3c912ef785311264a51ab9f3698e421b
- git.kernel.org/stable/c/5e53e285f8c989662e34d4938c728a94226bff34
- git.kernel.org/stable/c/7250b6b5ba9b737cff2c2c1d0760360c7b6bca00
- git.kernel.org/stable/c/990e65eb9387c4ddfa7f68782b6644c2c35d489f
- git.kernel.org/stable/c/d2df29dc9abda2fc10ff522eac0969f5b77b3637
- git.kernel.org/stable/c/e054c1a6ae7310d2815778fddb87da616e11c255
Metrics
- CVSS 3.1
-
8.8
HIGH
Score source: CNA
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 34 · as of 11 November 2026
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