Answer in brief
CVE-2026-63871 records a Unknown severity vulnerability in Bluetooth: ISO: Fix data-race on iso_pi fields in hci_get_route calls. 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.
A CVSS score is not reported in the current record. 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.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=c524f9561c657b8af26dd4f67092b8928261aa62 <122b6a8b0c75b5f808aa6ea68e97103330b9ffa7 || >=241f51931c35085449502c10f64fb3ecd6e02171 <9798f7d41d85ff763afd1f1cc0533b5c416c8348 || >=241f51931c35085449502c10f64fb3ecd6e02171 <ab84fd7779a2a7ff5d2c8eac212c43733f56216e || >=241f51931c35085449502c10f64fb3ecd6e02171 <859bb1f4cb615d98c9c1ab2bd76ebb0b8fe46020 || >=241f51931c35085449502c10f64fb3ecd6e02171 <9ca7053d6215d89c33f28893bfd1625a32919d3f || >=6.1.9 <6.1.191 | 122b6a8b0c75b5f808aa6ea68e97103330b9ffa7, 9798f7d41d85ff763afd1f1cc0533b5c416c8348, ab84fd7779a2a7ff5d2c8eac212c43733f56216e, 859bb1f4cb615d98c9c1ab2bd76ebb0b8fe46020, 9ca7053d6215d89c33f28893bfd1625a32919d3f, 6.1.191 |
| Linux/Linuxgeneric | 6.2 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 30, 2026
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: Fix data-race on iso_pi fields in hci_get_route calls iso_connect_bis(), iso_connect_cis(), iso_listen_bis(), and iso_conn_big_sync() call hci_get_route() using iso_pi(sk)->dst, iso_pi(sk)->src, and iso_pi(sk)->src_type without holding lock_sock(). These fields may be modified concurrently by connect() or setsockopt() on the same socket, resulting in data-races reported by KCSAN. Fix this by snapshotting the required fields under lock_sock() before calling hci_get_route(). BUG: KCSAN: data-race in memcmp+0x45/0xb0 race at unknown origin, with read to 0xffff8880122135cf of 1 bytes by task 333 on cpu 1: memcmp+0x45/0xb0 hci_get_route+0x27e/0x490 iso_connect_cis+0x4c/0xa10 iso_sock_connect+0x60e/0xb30 __sys_connect_file+0xbd/0xe0 __sys_connect+0xe0/0x110 __x64_sys_connect+0x40/0x50 x64_sys_call+0xcad/0x1c60 do_syscall_64+0x133/0x590 entry_SYSCALL_64_after_hwframe+0x77/0x7f
Quoted source text, attributed separately from HOL analysis.