{"id":"CVE-2026-53071","summary":"Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp\n\nl2cap_ecred_reconf_rsp() calls l2cap_chan_del() without holding\nl2cap_chan_lock(). Every other l2cap_chan_del() caller in the file\nacquires the lock first. A remote BLE device can send a crafted\nL2CAP ECRED reconfiguration response to corrupt the channel list\nwhile another thread is iterating it.\n\nAdd l2cap_chan_hold() and l2cap_chan_lock() before l2cap_chan_del(),\nand l2cap_chan_unlock() and l2cap_chan_put() after, matching the\npattern used in l2cap_ecred_conn_rsp() and l2cap_conn_del().","modified":"2026-07-09T18:29:29.477772354Z","published":"2026-06-24T16:30:12.694Z","related":["SUSE-SU-2026:22521-1","SUSE-SU-2026:22522-1","SUSE-SU-2026:2799-1","SUSE-SU-2026:2800-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53071.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0ccd75c51f620374086f359e906917676e699a1c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/330b20ec97916961ee0e6c29c06bc0fa7c96e64c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/42776497cdbc9a665b384a6dcb85f0d4bd927eab"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5501d055a1ce3c747141e3955ba8cf034d193f3e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/77a853aec710b2fdf41fa298ea3cbc9a4358f917"},{"type":"WEB","url":"https://git.kernel.org/stable/c/96dca51715d86559ed6ed8028e5445cecb80f3ae"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dc89961b76f12aff47124c1df4bdb32a080f4d0c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fe1188abdae9b7a8199dcdfcf9244d5e5d61eb14"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53071.json"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-53071"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53071.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53071"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2492458"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"15f02b91056253e8cdc592888f431da0731337b8"},{"fixed":"96dca51715d86559ed6ed8028e5445cecb80f3ae"},{"fixed":"330b20ec97916961ee0e6c29c06bc0fa7c96e64c"},{"fixed":"0ccd75c51f620374086f359e906917676e699a1c"},{"fixed":"77a853aec710b2fdf41fa298ea3cbc9a4358f917"},{"fixed":"fe1188abdae9b7a8199dcdfcf9244d5e5d61eb14"},{"fixed":"dc89961b76f12aff47124c1df4bdb32a080f4d0c"},{"fixed":"5501d055a1ce3c747141e3955ba8cf034d193f3e"},{"fixed":"42776497cdbc9a665b384a6dcb85f0d4bd927eab"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-53071.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.7.0"},{"fixed":"5.10.258"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.209"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.175"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.141"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.91"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.33"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.10"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-53071.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}