Answer in brief
CVE-2026-63946 records a High severity (CVSS 8.8) vulnerability in Bluetooth: ISO: fix UAF in iso_recv_frame. 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 8.8. 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 |
| cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=ccf74f2390d60a2f9a75ef496d2564abb478f46a <c57ea90f203c8b8b41a474f19a09000d0f841436 || >=ccf74f2390d60a2f9a75ef496d2564abb478f46a <119fb6f80c44dc1c65d604cf28e64c56bd9b6568 || >=ccf74f2390d60a2f9a75ef496d2564abb478f46a <b04ec131325baf4ea4577d6c6e6b86cf092e3731 || >=ccf74f2390d60a2f9a75ef496d2564abb478f46a <c318aa51830a3d2cc1229968fe521441c97356cd || >=ccf74f2390d60a2f9a75ef496d2564abb478f46a <1a6b803b00ccdd7666506adbe01ddae1c72d1ca9 || >=ccf74f2390d60a2f9a75ef496d2564abb478f46a <47f23a259517abbdb8032c057a1e8a6bf3734878 | c57ea90f203c8b8b41a474f19a09000d0f841436, 119fb6f80c44dc1c65d604cf28e64c56bd9b6568, b04ec131325baf4ea4577d6c6e6b86cf092e3731, c318aa51830a3d2cc1229968fe521441c97356cd, 1a6b803b00ccdd7666506adbe01ddae1c72d1ca9, 47f23a259517abbdb8032c057a1e8a6bf3734878 |
| Linux/Linuxgeneric | 6.0 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 28, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: fix UAF in iso_recv_frame iso_recv_frame reads conn->sk under iso_conn_lock but releases the lock before using sk, with no reference held. A concurrent iso_sock_kill() can free sk in that window, causing use-after-free on sk->sk_state and sock_queue_rcv_skb(). Fix by replacing the bare pointer read with iso_sock_hold(conn), which calls sock_hold() while the spinlock is held, atomically elevating the refcount before the lock drops. Add a drop_put label so sock_put() is called on all exit paths where the hold succeeded.
Quoted source text, attributed separately from HOL analysis.