{"id":"DEBIAN-CVE-2021-47459","details":"In the Linux kernel, the following vulnerability has been resolved:  can: j1939: j1939_netdev_start(): fix UAF for rx_kref of j1939_priv  It will trigger UAF for rx_kref of j1939_priv as following.          cpu0                                    cpu1 j1939_sk_bind(socket0, ndev0, ...) j1939_netdev_start                                         j1939_sk_bind(socket1, ndev0, ...)                                         j1939_netdev_start j1939_priv_set                                         j1939_priv_get_by_ndev_locked j1939_jsk_add ..... j1939_netdev_stop kref_put_lock(&priv-\u003erx_kref, ...)                                         kref_get(&priv-\u003erx_kref, ...)                                         REFCOUNT_WARN(\"addition on 0;...\")  ==================================================== refcount_t: addition on 0; use-after-free. WARNING: CPU: 1 PID: 20874 at lib/refcount.c:25 refcount_warn_saturate+0x169/0x1e0 RIP: 0010:refcount_warn_saturate+0x169/0x1e0 Call Trace:  j1939_netdev_start+0x68b/0x920  j1939_sk_bind+0x426/0xeb0  ? security_socket_bind+0x83/0xb0  The rx_kref's kref_get() and kref_put() should use j1939_netdev_lock to protect.","modified":"2026-09-15T09:02:35.810157442Z","published":"2024-05-22T07:15:10.863Z","upstream":["CVE-2021-47459"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2021-47459"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.14.16-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2021-47459.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.14.16-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2021-47459.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.14.16-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2021-47459.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}