Medium 5.5Published Jul 19, 2026

CVE-2026-64128Bluetooth: ISO: drop ISO_END frames received without prior ISO_START

Updated under an hour ago (Oct 27, 2026, 1:10 AM 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: drop ISO_END frames received without prior ISO_START ISO data PDUs carry a packet-boundary flag indicating START, CONT, END or SINGLE. The ISO_CONT branch of iso_recv() guards against a missing ISO_START by checking conn->rx_len before touching conn->rx_skb, but ISO_END does not. If a peer sends an ISO_END as the first packet on a fresh ISO connection, conn->rx_skb is still NULL and conn->rx_len is zero, so skb_put(conn->rx_skb, ...) dereferences NULL and oopses. For BIS, where receivers sync to a broadcaster without pairing, any broadcaster on the air can trigger this. Mirror the ISO_CONT check at the top of ISO_END so a stray end fragment is logged and dropped instead of crashing the host.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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: Analyzed
Record last updated: Jul 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from ccf74f2390d60a2f9a75ef496d2564abb478f46a before 1c3d1e1696b72579b970e17999c503a14535205b; from ccf74f2390d60a2f9a75ef496d2564abb478f46a before 3af41ee7ebecb0d5c8a504861f6cfad31345310f; from ccf74f2390d60a2f9a75ef496d2564abb478f46a before 39f4a82e80c8f5ed2d6952d73fbafc895721a728; from ccf74f2390d60a2f9a75ef496d2564abb478f46a before 61f2410a96dee808029e2ae4d6ef2dd635f3477f; from ccf74f2390d60a2f9a75ef496d2564abb478f46a before e3a799881c12d27596232636a607e2e3fa448d63; from ccf74f2390d60a2f9a75ef496d2564abb478f46a before 84c24fb151fc1179355296d7ff29129ac7c42129	CNA record
linux linux_kernel linux:linux_kernel	from 6.0 before 6.1.175; from 6.2 before 6.6.142; from 6.7 before 6.12.92; from 6.13 before 6.18.34; from 6.19 before 7.0.11; 7.1; 7.1; 7.1; and 1 more ranges	NVD

References

References

https://git.kernel.org/stable/c/1c3d1e1696b72579b970e17999c503a14535205b	patch
https://git.kernel.org/stable/c/3af41ee7ebecb0d5c8a504861f6cfad31345310f	patch
https://git.kernel.org/stable/c/39f4a82e80c8f5ed2d6952d73fbafc895721a728	patch
https://git.kernel.org/stable/c/61f2410a96dee808029e2ae4d6ef2dd635f3477f	patch
https://git.kernel.org/stable/c/e3a799881c12d27596232636a607e2e3fa448d63	patch
https://git.kernel.org/stable/c/84c24fb151fc1179355296d7ff29129ac7c42129	patch

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.