CVE-2026-63871
- Source
- https://cve.org/CVERecord?id=CVE-2026-63871
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63871.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-63871
- Downstream
AZL (1)
BELL (1)
DEBIAN (1)
MGASA (1)
openSUSE (1)
ROOT (1)
SUSE (5)
- Related
- Published
- 2026-07-19T14:18:39Z
- Modified
- 2026-10-08T02:51:28Z
- Summary
- Bluetooth: ISO: Fix data-race on iso_pi fields in hci_get_route calls
- Details
-
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
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63871.json" }- References
-
- https://git.kernel.org/stable/c/859bb1f4cb615d98c9c1ab2bd76ebb0b8fe46020
- https://git.kernel.org/stable/c/9798f7d41d85ff763afd1f1cc0533b5c416c8348
- https://git.kernel.org/stable/c/9ca7053d6215d89c33f28893bfd1625a32919d3f
- https://git.kernel.org/stable/c/ab84fd7779a2a7ff5d2c8eac212c43733f56216e
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63871.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-63871
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced241f51931c35085449502c10f64fb3ecd6e02171Fixed9798f7d41d85ff763afd1f1cc0533b5c416c8348Fixedab84fd7779a2a7ff5d2c8eac212c43733f56216eFixed859bb1f4cb615d98c9c1ab2bd76ebb0b8fe46020Fixed9ca7053d6215d89c33f28893bfd1625a32919d3f
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.1.9Fixed6.2
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedc524f9561c657b8af26dd4f67092b8928261aa62