CVE-2026-63871

CVE CVE-2026-63871EUVD EUVD-2026-45556Published 2026-07-19T14:18:39.000Z

What the advisory describes

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

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux 6.2; patch: 7.0.13; 241f51931c35085449502c10f64fb3ecd6e02171 <ab84fd7779a2a7ff5d2c8eac212c43733f56216e; 241f51931c35085449502c10f64fb3ecd6e02171 <9798f7d41d85ff763afd1f1cc0533b5c416c8348; patch: 6.18.36; patch: 7.1; c524f9561c657b8af26dd4f67092b8928261aa62; 241f51931c35085449502c10f64fb3ecd6e02171 <859bb1f4cb615d98c9c1ab2bd76ebb0b8fe46020; patch: 0; 241f51931c35085449502c10f64fb3ecd6e02171 <9ca7053d6215d89c33f28893bfd1625a32919d3f; 6.1.9 <6.2; patch: 6.12.94

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

Does this concern one of your customers?

This page cannot answer that — it does not know your estate. Whoever has recorded their environments gets the answer the morning after publication, together with a paragraph they can forward to the customer unedited.

Try it for 28 days

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.