{"id":"CVE-2026-74530","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: hold conn in hci_connect_big_sync() callback\n\nThere is theoretical UAF if the conn is freed while the hci_sync task is\nrunning.\n\nHold refcount to a…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: hold conn in hci_connect_big_sync() callback\n\nThere is theoretical UAF if the conn is freed while the hci_sync task is\nrunning.\n\nHold refcount to a…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= 024421cf39923927ab2b5fe895d1d922b9abe67f < ff5625d27415ace5667bf87ebc16c3a0a98db22f","Linux >= 024421cf39923927ab2b5fe895d1d922b9abe67f < 2d91e6244b69d752503b2d44020d8b0e323dbd38","Linux >= 024421cf39923927ab2b5fe895d1d922b9abe67f < 56e78b670356caab0b607e8aad4cf819a1909d07","Linux 620810ac1f7f1133a9ac403e132b3ad6995ddf39","Linux ee0586ad64a805eaf1a9a10100e908627a561e34","Linux >= 6.12.28 < 6.13","Linux >= 6.14.6 < 6.15","Linux 6.15"],"published":"2026-08-15","updated":"2026-10-15","sourceUpdated":"2026-10-15T11:17:47.013","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74530","references":[{"url":"https://git.kernel.org/stable/c/2d91e6244b69d752503b2d44020d8b0e323dbd38","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/56e78b670356caab0b607e8aad4cf819a1909d07","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ff5625d27415ace5667bf87ebc16c3a0a98db22f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.0034,"epssPercentile":0.25837,"ingestedAt":"2026-10-15T11:00:41.676Z","slug":"CVE-2026-74530","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: hold conn in hci_connect_big_sync() callback\n\nThere is theoretical UAF if the conn is freed while the hci_sync task is\nrunning.\n\nHold refcount to avoid that. Handle NULL hcon, return 0 + do nothing to\nmatch the previous behavior.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}