{"id":"CVE-2019-3701","details":"An issue was discovered in can_can_gw_rcv in net/can/gw.c in the Linux kernel through 4.19.13. The CAN frame modification rules allow bitwise logical operations that can be also applied to the can_dlc field. The privileged user \"root\" with CAP_NET_ADMIN can create a CAN frame modification rule that makes the data length code a higher value than the available CAN frame data size. In combination with a configured checksum calculation where the result is stored relatively to the end of the data (e.g. cgw_csum_xor_rel) the tail of the skb (e.g. frag_list pointer in skb_shared_info) can be rewritten which finally can cause a system crash. Because of a missing check, the CAN drivers may write arbitrary content beyond the data registers in the CAN controller's I/O memory when processing can-gw manipulated outgoing frames.","modified":"2026-03-12T23:20:37.685633Z","published":"2019-01-03T16:29:00.553Z","related":["MGASA-2019-0097","MGASA-2019-0098","MGASA-2019-0171","SUSE-SU-2020:1084-1","SUSE-SU-2020:1085-1","SUSE-SU-2020:1087-1","SUSE-SU-2020:1118-1","SUSE-SU-2020:1119-1","SUSE-SU-2020:1123-1","SUSE-SU-2020:1141-1","SUSE-SU-2020:1142-1","SUSE-SU-2020:1146-1","SUSE-SU-2020:1255-1","SUSE-SU-2020:1275-1","SUSE-SU-2020:1663-1","openSUSE-SU-2020:0543-1"],"references":[{"type":"WEB","url":"https://usn.ubuntu.com/4115-1/"},{"type":"WEB","url":"https://usn.ubuntu.com/4118-1/"},{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00035.html"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2019/05/msg00002.html"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3932-2/"},{"type":"ADVISORY","url":"https://support.f5.com/csp/article/K17957133"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3932-1/"},{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/106443"},{"type":"FIX","url":"https://marc.info/?l=linux-netdev&m=154661373531512&w=2"},{"type":"FIX","url":"https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=0aaa81377c5a01f686bcdb8c7a6929a7bf330c68"},{"type":"FIX","url":"https://marc.info/?l=linux-netdev&m=154651842302479&w=2"},{"type":"FIX","url":"https://bugzilla.suse.com/show_bug.cgi?id=1120386"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"4.19.13"}]},{"events":[{"introduced":"0"},{"last_affected":"8.0"}]},{"events":[{"introduced":"0"},{"last_affected":"14.04"}]},{"events":[{"introduced":"0"},{"last_affected":"16.04"}]}],"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2019-3701.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H"}]}