{"id":"CVE-2026-45846","summary":"bareudp: fix NULL pointer dereference in bareudp_fill_metadata_dst()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nbareudp: fix NULL pointer dereference in bareudp_fill_metadata_dst()\n\nbareudp_fill_metadata_dst() passes bareudp-\u003esock to\nudp_tunnel6_dst_lookup() in the IPv6 path without a NULL check.\nThe socket is only created in bareudp_open() and NULLed in\nbareudp_stop(), so calling this function while the device is down\ntriggers a NULL dereference via sock-\u003esk.\n\n BUG: kernel NULL pointer dereference, address: 0000000000000018\n RIP: 0010:udp_tunnel6_dst_lookup (net/ipv6/ip6_udp_tunnel.c:160)\n Call Trace:\n  \u003cTASK\u003e\n  bareudp_fill_metadata_dst (drivers/net/bareudp.c:532)\n  do_execute_actions (net/openvswitch/actions.c:901)\n  ovs_execute_actions (net/openvswitch/actions.c:1589)\n  ovs_packet_cmd_execute (net/openvswitch/datapath.c:700)\n  genl_family_rcv_msg_doit (net/netlink/genetlink.c:1114)\n  genl_rcv_msg (net/netlink/genetlink.c:1209)\n  netlink_rcv_skb (net/netlink/af_netlink.c:2550)\n  \u003c/TASK\u003e\n\nAdd a NULL check returning -ESHUTDOWN, consistent with the xmit paths\nin the same driver.","modified":"2026-07-15T01:49:20.633044045Z","published":"2026-05-27T09:24:52.122Z","related":["SUSE-SU-2026:22099-1","SUSE-SU-2026:22108-1","SUSE-SU-2026:22112-1","SUSE-SU-2026:22117-1","SUSE-SU-2026:22127-1","SUSE-SU-2026:22137-1","SUSE-SU-2026:22433-1","SUSE-SU-2026:22458-1","SUSE-SU-2026:2482-1","SUSE-SU-2026:2591-1","openSUSE-SU-2026:10954-1","openSUSE-SU-2026:20965-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45846.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/31e010a106ff6cd8ccac4bfee547fd3fa1015574"},{"type":"WEB","url":"https://git.kernel.org/stable/c/35a115a204be08f97450b0389413e218268ef4a2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/51eef9c072aa3405a6823a96ae666d38a3b48750"},{"type":"WEB","url":"https://git.kernel.org/stable/c/55193df8d6d33318435f19572bf5ea47a22eee28"},{"type":"WEB","url":"https://git.kernel.org/stable/c/638905520fc4fae6a80991563f264131545ba3df"},{"type":"WEB","url":"https://git.kernel.org/stable/c/74a02921c48fcd35a7881956c9e5c52b86595f5d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a0f4e4e8e0f5e24ddd83e3d1221732621cf34636"},{"type":"WEB","url":"https://git.kernel.org/stable/c/aa6c6d9ee064aabfede4402fd1283424e649ca19"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45846.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45846"},{"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":"571912c69f0ed731bd1e071ade9dc7ca4aa52065"},{"fixed":"31e010a106ff6cd8ccac4bfee547fd3fa1015574"},{"fixed":"55193df8d6d33318435f19572bf5ea47a22eee28"},{"fixed":"51eef9c072aa3405a6823a96ae666d38a3b48750"},{"fixed":"a0f4e4e8e0f5e24ddd83e3d1221732621cf34636"},{"fixed":"35a115a204be08f97450b0389413e218268ef4a2"},{"fixed":"74a02921c48fcd35a7881956c9e5c52b86595f5d"},{"fixed":"638905520fc4fae6a80991563f264131545ba3df"},{"fixed":"aa6c6d9ee064aabfede4402fd1283424e649ca19"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45846.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/cve-osv-conversion/osv-output/CVE-2026-45846.json"}}],"schema_version":"1.7.5"}