High 8.8Published Aug 15, 2026

CVE-2026-72334Bluetooth: ISO: fix malformed ISO_END/CONT handling

Updated under an hour ago (Oct 27, 2026, 3:50 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 16, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from ccf74f2390d60a2f9a75ef496d2564abb478f46a before d2df29dc9abda2fc10ff522eac0969f5b77b3637; from ccf74f2390d60a2f9a75ef496d2564abb478f46a before 7250b6b5ba9b737cff2c2c1d0760360c7b6bca00; from ccf74f2390d60a2f9a75ef496d2564abb478f46a before 49aeb54e3c912ef785311264a51ab9f3698e421b; from ccf74f2390d60a2f9a75ef496d2564abb478f46a before 5e53e285f8c989662e34d4938c728a94226bff34; from ccf74f2390d60a2f9a75ef496d2564abb478f46a before 990e65eb9387c4ddfa7f68782b6644c2c35d489f; from ccf74f2390d60a2f9a75ef496d2564abb478f46a before e054c1a6ae7310d2815778fddb87da616e11c255	CNA record

References

References

https://git.kernel.org/stable/c/d2df29dc9abda2fc10ff522eac0969f5b77b3637
https://git.kernel.org/stable/c/7250b6b5ba9b737cff2c2c1d0760360c7b6bca00
https://git.kernel.org/stable/c/49aeb54e3c912ef785311264a51ab9f3698e421b
https://git.kernel.org/stable/c/5e53e285f8c989662e34d4938c728a94226bff34
https://git.kernel.org/stable/c/990e65eb9387c4ddfa7f68782b6644c2c35d489f
https://git.kernel.org/stable/c/e054c1a6ae7310d2815778fddb87da616e11c255

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.