{"id":82252,"date":"2026-07-19T18:46:54","date_gmt":"2026-07-19T15:16:54","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2026-63871-bluetooth-iso-fix-data-race-on-iso_pi-fields-in-hci_get_route-calls\/"},"modified":"2026-07-19T18:46:54","modified_gmt":"2026-07-19T15:16:54","slug":"cve-2026-63871-bluetooth-iso-fix-data-race-on-iso_pi-fields-in-hci_get_route-calls","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2026-63871-bluetooth-iso-fix-data-race-on-iso_pi-fields-in-hci_get_route-calls\/","title":{"rendered":"CVE-2026-63871 &#8211; Bluetooth: ISO: Fix data-race on iso_pi fields in hci_get_route calls"},"content":{"rendered":"<p>CVE ID :CVE-2026-63871<\/p>\n<p>  Published : July 19, 2026, 3:16 p.m. | 23\u00a0minutes ago<\/p>\n<p>  Description :In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>Bluetooth: ISO: Fix data-race on iso_pi fields in hci_get_route calls<\/p>\n<p>iso_connect_bis(), iso_connect_cis(), iso_listen_bis(), and<br \/>\niso_conn_big_sync() call hci_get_route() using iso_pi(sk)-&gt;dst,<br \/>\niso_pi(sk)-&gt;src, and iso_pi(sk)-&gt;src_type without holding lock_sock().<\/p>\n<p>These fields may be modified concurrently by connect() or setsockopt()<br \/>\non the same socket, resulting in data-races reported by KCSAN.<\/p>\n<p>Fix this by snapshotting the required fields under lock_sock() before<br \/>\ncalling hci_get_route().<\/p>\n<p>BUG: KCSAN: data-race in memcmp+0x45\/0xb0<\/p>\n<p>race at unknown origin, with read to 0xffff8880122135cf of 1 bytes<br \/>\nby task 333 on cpu 1:<br \/>\n memcmp+0x45\/0xb0<br \/>\n hci_get_route+0x27e\/0x490<br \/>\n iso_connect_cis+0x4c\/0xa10<br \/>\n iso_sock_connect+0x60e\/0xb30<br \/>\n __sys_connect_file+0xbd\/0xe0<br \/>\n __sys_connect+0xe0\/0x110<br \/>\n __x64_sys_connect+0x40\/0x50<br \/>\n x64_sys_call+0xcad\/0x1c60<br \/>\n do_syscall_64+0x133\/0x590<br \/>\n entry_SYSCALL_64_after_hwframe+0x77\/0x7f<\/p>\n<p>  Severity: 0.0 | NA<\/p>\n<p>  Visit the link for more details, such as CVSS details, affected products, timeline, and more&#8230;\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CVE ID :CVE-2026-63871 Published : July 19, 2026, 3:16 p.m. | 23\u00a0minutes ago Description :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)-&gt;dst, iso_pi(sk)-&gt;src, and iso_pi(sk)-&gt;src_type without holding lock_sock(). These fields may be modified concurrently &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-82252","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82252","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=82252"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82252\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=82252"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=82252"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=82252"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}