{"api_version":"1","generated_at":"2026-07-25T01:17:17+00:00","cve":"CVE-2026-63871","urls":{"html":"https://cve.report/CVE-2026-63871","api":"https://cve.report/api/cve/CVE-2026-63871.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-63871","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-63871"},"summary":{"title":"Bluetooth: ISO: Fix data-race on iso_pi fields in hci_get_route calls","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: Fix data-race on iso_pi fields in hci_get_route calls\n\niso_connect_bis(), iso_connect_cis(), iso_listen_bis(), and\niso_conn_big_sync() call hci_get_route() using iso_pi(sk)->dst,\niso_pi(sk)->src, and iso_pi(sk)->src_type without holding lock_sock().\n\nThese fields may be modified concurrently by connect() or setsockopt()\non the same socket, resulting in data-races reported by KCSAN.\n\nFix this by snapshotting the required fields under lock_sock() before\ncalling hci_get_route().\n\nBUG: KCSAN: data-race in memcmp+0x45/0xb0\n\nrace at unknown origin, with read to 0xffff8880122135cf of 1 bytes\nby task 333 on cpu 1:\n memcmp+0x45/0xb0\n hci_get_route+0x27e/0x490\n iso_connect_cis+0x4c/0xa10\n iso_sock_connect+0x60e/0xb30\n __sys_connect_file+0xbd/0xe0\n __sys_connect+0xe0/0x110\n __x64_sys_connect+0x40/0x50\n x64_sys_call+0xcad/0x1c60\n do_syscall_64+0x133/0x590\n entry_SYSCALL_64_after_hwframe+0x77/0x7f","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-19 15:16:54","updated_at":"2026-07-19 15:16:54"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/9ca7053d6215d89c33f28893bfd1625a32919d3f","name":"https://git.kernel.org/stable/c/9ca7053d6215d89c33f28893bfd1625a32919d3f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/859bb1f4cb615d98c9c1ab2bd76ebb0b8fe46020","name":"https://git.kernel.org/stable/c/859bb1f4cb615d98c9c1ab2bd76ebb0b8fe46020","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ab84fd7779a2a7ff5d2c8eac212c43733f56216e","name":"https://git.kernel.org/stable/c/ab84fd7779a2a7ff5d2c8eac212c43733f56216e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9798f7d41d85ff763afd1f1cc0533b5c416c8348","name":"https://git.kernel.org/stable/c/9798f7d41d85ff763afd1f1cc0533b5c416c8348","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-63871","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63871","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 241f51931c35085449502c10f64fb3ecd6e02171 9798f7d41d85ff763afd1f1cc0533b5c416c8348 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 241f51931c35085449502c10f64fb3ecd6e02171 ab84fd7779a2a7ff5d2c8eac212c43733f56216e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 241f51931c35085449502c10f64fb3ecd6e02171 859bb1f4cb615d98c9c1ab2bd76ebb0b8fe46020 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 241f51931c35085449502c10f64fb3ecd6e02171 9ca7053d6215d89c33f28893bfd1625a32919d3f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c524f9561c657b8af26dd4f67092b8928261aa62 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.1.9 6.2 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.2","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.2 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.94 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.36 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.13 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"63871","cve":"CVE-2026-63871","epss":"0.001570000","percentile":"0.052630000","score_date":"2026-07-20","updated_at":"2026-07-21 00:13:14"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/bluetooth/iso.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"9798f7d41d85ff763afd1f1cc0533b5c416c8348","status":"affected","version":"241f51931c35085449502c10f64fb3ecd6e02171","versionType":"git"},{"lessThan":"ab84fd7779a2a7ff5d2c8eac212c43733f56216e","status":"affected","version":"241f51931c35085449502c10f64fb3ecd6e02171","versionType":"git"},{"lessThan":"859bb1f4cb615d98c9c1ab2bd76ebb0b8fe46020","status":"affected","version":"241f51931c35085449502c10f64fb3ecd6e02171","versionType":"git"},{"lessThan":"9ca7053d6215d89c33f28893bfd1625a32919d3f","status":"affected","version":"241f51931c35085449502c10f64fb3ecd6e02171","versionType":"git"},{"status":"affected","version":"c524f9561c657b8af26dd4f67092b8928261aa62","versionType":"git"},{"lessThan":"6.2","status":"affected","version":"6.1.9","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/bluetooth/iso.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.2"},{"lessThan":"6.2","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.94","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.36","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.13","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.94","versionStartIncluding":"6.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.36","versionStartIncluding":"6.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.13","versionStartIncluding":"6.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"6.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.9","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: Fix data-race on iso_pi fields in hci_get_route calls\n\niso_connect_bis(), iso_connect_cis(), iso_listen_bis(), and\niso_conn_big_sync() call hci_get_route() using iso_pi(sk)->dst,\niso_pi(sk)->src, and iso_pi(sk)->src_type without holding lock_sock().\n\nThese fields may be modified concurrently by connect() or setsockopt()\non the same socket, resulting in data-races reported by KCSAN.\n\nFix this by snapshotting the required fields under lock_sock() before\ncalling hci_get_route().\n\nBUG: KCSAN: data-race in memcmp+0x45/0xb0\n\nrace at unknown origin, with read to 0xffff8880122135cf of 1 bytes\nby task 333 on cpu 1:\n memcmp+0x45/0xb0\n hci_get_route+0x27e/0x490\n iso_connect_cis+0x4c/0xa10\n iso_sock_connect+0x60e/0xb30\n __sys_connect_file+0xbd/0xe0\n __sys_connect+0xe0/0x110\n __x64_sys_connect+0x40/0x50\n x64_sys_call+0xcad/0x1c60\n do_syscall_64+0x133/0x590\n entry_SYSCALL_64_after_hwframe+0x77/0x7f"}],"providerMetadata":{"dateUpdated":"2026-07-19T14:18:39.787Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/9798f7d41d85ff763afd1f1cc0533b5c416c8348"},{"url":"https://git.kernel.org/stable/c/ab84fd7779a2a7ff5d2c8eac212c43733f56216e"},{"url":"https://git.kernel.org/stable/c/859bb1f4cb615d98c9c1ab2bd76ebb0b8fe46020"},{"url":"https://git.kernel.org/stable/c/9ca7053d6215d89c33f28893bfd1625a32919d3f"}],"title":"Bluetooth: ISO: Fix data-race on iso_pi fields in hci_get_route calls","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-63871","datePublished":"2026-07-19T14:18:39.787Z","dateReserved":"2026-07-19T07:54:57.017Z","dateUpdated":"2026-07-19T14:18:39.787Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-19 15:16:54","lastModifiedDate":"2026-07-19 15:16:54","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"63871","Ordinal":"1","Title":"Bluetooth: ISO: Fix data-race on iso_pi fields in hci_get_route ","CVE":"CVE-2026-63871","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"63871","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: Fix data-race on iso_pi fields in hci_get_route calls\n\niso_connect_bis(), iso_connect_cis(), iso_listen_bis(), and\niso_conn_big_sync() call hci_get_route() using iso_pi(sk)->dst,\niso_pi(sk)->src, and iso_pi(sk)->src_type without holding lock_sock().\n\nThese fields may be modified concurrently by connect() or setsockopt()\non the same socket, resulting in data-races reported by KCSAN.\n\nFix this by snapshotting the required fields under lock_sock() before\ncalling hci_get_route().\n\nBUG: KCSAN: data-race in memcmp+0x45/0xb0\n\nrace at unknown origin, with read to 0xffff8880122135cf of 1 bytes\nby task 333 on cpu 1:\n memcmp+0x45/0xb0\n hci_get_route+0x27e/0x490\n iso_connect_cis+0x4c/0xa10\n iso_sock_connect+0x60e/0xb30\n __sys_connect_file+0xbd/0xe0\n __sys_connect+0xe0/0x110\n __x64_sys_connect+0x40/0x50\n x64_sys_call+0xcad/0x1c60\n do_syscall_64+0x133/0x590\n entry_SYSCALL_64_after_hwframe+0x77/0x7f","Type":"Description","Title":"Bluetooth: ISO: Fix data-race on iso_pi fields in hci_get_route "}]}}}