CVE-2026-63871None▾ SunlitIn 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_rout…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Nov 5.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
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
Linux >= c524f9561c657b8af26dd4f67092b8928261aa62 < 122b6a8b0c75b5f808aa6ea68e97103330b9ffa7Linux >= 241f51931c35085449502c10f64fb3ecd6e02171 < 9798f7d41d85ff763afd1f1cc0533b5c416c8348Linux >= 241f51931c35085449502c10f64fb3ecd6e02171 < ab84fd7779a2a7ff5d2c8eac212c43733f56216eLinux >= 241f51931c35085449502c10f64fb3ecd6e02171 < 859bb1f4cb615d98c9c1ab2bd76ebb0b8fe46020Linux >= 241f51931c35085449502c10f64fb3ecd6e02171 < 9ca7053d6215d89c33f28893bfd1625a32919d3fLinux >= 6.1.9 < 6.1.191Linux 6.2Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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