← Vulnerability feed

Vulnerability record · CVE-2026-72334 · published 15 August 2026

CVE-2026-72334: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: fix malformed ISO_END/CON…

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.

8.8 CVSS 3.1 High EPSS 0.38% · top 70.7% Received
8.8CVSS 3.1 base score
0.38%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
21 Sep 2026Last modified by NVD

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.

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

References

LinkTags
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

Track CVE-2026-72334 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Source: NIST National Vulnerability Database (record CVE-2026-72334), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.