{"cve":"CVE-2026-80914","nvd":{"published":"2026-09-09T17:17:46.263","modified":"2026-10-19T09:17:22.270","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: fix use-after-free of listener socket in iso_conn_ready\n\niso_conn_ready() looks up the BIS listener socket with iso_get_sock(),\nwhich takes a reference, and then, without re-checking its state,\ncreates a child socket from it:\n\n    parent = iso_get_sock(hdev, ...);\n    if (!parent)\n        return;\n\n    lock_sock(parent);\n    sk = iso_sock_alloc(sock_net(parent), NULL, BTPROTO_ISO, ...);\n    ...\n    iso_chan_add(conn, sk, parent);\n    ...\n    release_sock(parent);\n    sock_put(parent);\n\nIf the listener socket is closed concurrently, between iso_get_sock()\nand lock_sock(), the reference taken by iso_get_sock() may be the last\none: the close path drops the link-list reference, and once\niso_conn_ready() drops its own reference at the end of the function the\nsocket is freed.  The child socket, however, is already linked to the\nfreed parent, and a later disconnect of the child runs iso_chan_del()\n-> bt_accept_unlink(), which dereferences the dangling parent pointer\ninto the freed accept queue (a use-after-free).  The same dangling\npointer is also dereferenced through parent->***() in\niso_chan_del().\n\nFix it the same way the connected (non-BIS) path was fixed in commit\n0d255e63fcf3 (\"Bluetooth: ISO: hold sk properly in iso_conn_ready\"):\nafter taking the socket lock, re-check that the parent is still a\nlistening, alive socket, and bail out otherwise.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.8},"cwes":[],"references":["https://git.kernel.org/stable/c/03288b7447c9e572f8ab82fc29cfb4ca719ab210","https://git.kernel.org/stable/c/1702f12cf59a1c3b670eb6bb4a4d6fcccf07e3b8","https://git.kernel.org/stable/c/2387cd06a2c0b416f05028b02bba1089f54c28d9","https://git.kernel.org/stable/c/49fd7116f76b860b230843700fb7423ab5331e1f","https://git.kernel.org/stable/c/560bef609fa5992745929e8d7d458b9d88dd2830"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:52:53.108888569+00:00"},"epss":{"cve":"CVE-2026-80914","score":0.00232,"percentile":0.13943,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}