Not yet scoredPublished Jul 19, 2026

CVE-2026-63871Bluetooth: ISO: Fix data-race on iso_pi fields in hci_get_route calls

Updated under an hour ago (Oct 28, 2026, 3:10 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: 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

CVSS: Not yet scored
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: Awaiting Analysis
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 241f51931c35085449502c10f64fb3ecd6e02171 before 9798f7d41d85ff763afd1f1cc0533b5c416c8348; from 241f51931c35085449502c10f64fb3ecd6e02171 before ab84fd7779a2a7ff5d2c8eac212c43733f56216e; from 241f51931c35085449502c10f64fb3ecd6e02171 before 859bb1f4cb615d98c9c1ab2bd76ebb0b8fe46020; 241f51931c35085449502c10f64fb3ecd6e02171 builds before 9ca7053d6215d89c33f28893bfd1625a32919d3f; c524f9561c657b8af26dd4f67092b8928261aa62; from 6.1.9 before 6.2	CNA record

References

References

https://git.kernel.org/stable/c/9798f7d41d85ff763afd1f1cc0533b5c416c8348
https://git.kernel.org/stable/c/ab84fd7779a2a7ff5d2c8eac212c43733f56216e
https://git.kernel.org/stable/c/859bb1f4cb615d98c9c1ab2bd76ebb0b8fe46020
https://git.kernel.org/stable/c/9ca7053d6215d89c33f28893bfd1625a32919d3f

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.