{"id":"CVE-2026-74535","revision":"c8635ba67511412e9d4be2dce92aa84f","records":[{"revision":"c8635ba67511412e9d4be2dce92aa84f","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-74535","aliases":[],"title":"Bluetooth: ISO: avoid deadlocks in iso_sock_timeout","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: avoid deadlocks in iso_sock_timeout\n\niso_sock_timeout() takes lock_sock, so sync disabling the timer while\nholding that lock may deadlock.\n\niso_sock_timeout() may also run concurrently with iso_conn_del(), which\nleads to UAF\n\n        [Task 1]                      [Task hdev->workqueue]\n        iso_sock_timeout              iso_conn_del\n          iso_conn_hold_unless_zero     iso_chan_del\n                           `------------> iso_conn_put\n                                      caller frees hcon\n          iso_conn_put\n            iso_conn_free\n              conn->hcon->iso_data = NULL; /* UAF */\n\nFix the deadlock by removing the disable from the lock_sock sections.\nMove the timer from iso_conn to iso_pinfo to decouple it from iso_conn\nwhich may need to be freed in lock_sock section. Convert some of the\nclear_timer to disable_timer.","state":0,"publishedAt":"2026-08-15T12:27:48.449+00:00","modifiedAt":"2026-10-16T19:05:53.982+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/bluetooth/iso.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"a58d0f5dac322e16cc75334d000666512341bde5\",\n                            \"lessThan\": \"16d89a63e08280abeef7218970a3bbd7ca62b021\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"dc26097bdb864a0d5955b9a25e43376ffc1af99b\",\n                            \"lessThan\": \"82e982f54f962f72646868ddbb2c3bd9ea178568\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"dc26097bdb864a0d5955b9a25e43376ffc1af99b\",\n                            \"lessThan\": \"3c3d5f85db80145636bb991a6005e2760012b985\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"dc26097bdb864a0d5955b9a25e43376ffc1af99b\",\n                            \"lessThan\": \"200fa1629c57a3ca2b03d3ca63fd3a9bfd910c43\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f53e7489273dc2bb307bf50f319b3762d45534f0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6.12.2\",\n                            \"lessThan\": \"6.12.103\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.11.11\",\n                            \"lessThan\": \"6.12\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/bluetooth/iso.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.13\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.13\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.103\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.44\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.8\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 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,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/16d89a63e08280abeef7218970a3bbd7ca62b021","https://git.kernel.org/stable/c/82e982f54f962f72646868ddbb2c3bd9ea178568","https://git.kernel.org/stable/c/3c3d5f85db80145636bb991a6005e2760012b985","https://git.kernel.org/stable/c/200fa1629c57a3ca2b03d3ca63fd3a9bfd910c43"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74535","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-74535","identifiers":["CVE-2026-74535"]},"retained":false,"historicalAffected":[]}],"coverage":[]}