Answer in brief
CVE-2026-64128 records a Medium severity (CVSS 5.5) vulnerability in Bluetooth: ISO: drop ISO_END frames received without prior ISO_START. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=ccf74f2390d60a2f9a75ef496d2564abb478f46a <1c3d1e1696b72579b970e17999c503a14535205b || >=ccf74f2390d60a2f9a75ef496d2564abb478f46a <3af41ee7ebecb0d5c8a504861f6cfad31345310f || >=ccf74f2390d60a2f9a75ef496d2564abb478f46a <39f4a82e80c8f5ed2d6952d73fbafc895721a728 || >=ccf74f2390d60a2f9a75ef496d2564abb478f46a <61f2410a96dee808029e2ae4d6ef2dd635f3477f || >=ccf74f2390d60a2f9a75ef496d2564abb478f46a <e3a799881c12d27596232636a607e2e3fa448d63 || >=ccf74f2390d60a2f9a75ef496d2564abb478f46a <84c24fb151fc1179355296d7ff29129ac7c42129 | 1c3d1e1696b72579b970e17999c503a14535205b, 3af41ee7ebecb0d5c8a504861f6cfad31345310f, 39f4a82e80c8f5ed2d6952d73fbafc895721a728, 61f2410a96dee808029e2ae4d6ef2dd635f3477f, e3a799881c12d27596232636a607e2e3fa448d63, 84c24fb151fc1179355296d7ff29129ac7c42129 |
| Linux/Linuxgeneric | 6.0 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 14, 2026
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.
Quoted source text, attributed separately from HOL analysis.