{"cve":"CVE-2026-74537","nvd":{"published":"2026-08-15T13:17:59.040","modified":"2026-10-21T13:19:46.163","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: hold sk properly in iso_conn_ready\n\nsk deref in iso_conn_ready must be done either under conn->lock, or\nholding a refcount, to avoid concurrent close. conn->sk is currently\naccessed without either:\n\n    [Task 1]            [Task 2]\n                        iso_sock_release\n    iso_conn_ready\n      sk = conn->sk\n                          lock_sock(sk)\n                            conn->sk = NULL\n      lock_sock(sk)\n                          release_sock(sk)\n                          iso_sock_kill(sk)\n       UAF on sk deref\n\nFix possible UAF by holding sk refcount in iso_conn_ready().  Also\nrecheck after lock_sock that the socket is still valid.  Adjust locking\nso conn->sk is cleared only under lock_sock.","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/0d255e63fcf3f13a570d7ac11678fa1164ac015c","https://git.kernel.org/stable/c/1308d72903d792d10b82bc4ef08b8a4452308b04","https://git.kernel.org/stable/c/44590dc53c9e949d2fed399a571a89c3d7d0b245","https://git.kernel.org/stable/c/4e9b5e8669b3602a4e01b6d1e9539b72e42c84d5","https://git.kernel.org/stable/c/99b65f0ea3370c13687ff870330c425b6ca44e89"],"products":[],"source":"nvd","synced_at":"2026-10-22T16:41:11.231219466+00:00"},"epss":{"cve":"CVE-2026-74537","score":0.00254,"percentile":0.16725,"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."]}