{"cve":"CVE-2026-23293","nvd":{"published":"2026-03-25T11:16:24.520","modified":"2026-10-15T02:18:47.777","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: vxlan: fix nd_tbl NULL dereference when IPv6 is disabled\n\nWhen booting with the 'ipv6.disable=1' parameter, the nd_tbl is never\ninitialized because inet6_init() exits before ndisc_init() is called\nwhich initializes it. If an IPv6 packet is injected into the interface,\nroute_shortcircuit() is called and a NULL pointer dereference happens on\nneigh_lookup().\n\n BUG: kernel NULL pointer dereference, address: 0000000000000380\n Oops: Oops: 0000 [#1] SMP NOPTI\n [...]\n RIP: 0010:neigh_lookup+0x20/0x270\n [...]\n Call Trace:\n  <TASK>\n  vxlan_xmit+0x638/0x1ef0 [vxlan]\n  dev_hard_start_xmit+0x9e/0x2e0\n  __dev_queue_xmit+0xbee/0x14e0\n  packet_sendmsg+0x116f/0x1930\n  __sys_sendto+0x1f5/0x200\n  __x64_sys_sendto+0x24/0x30\n  do_syscall_64+0x12f/0x1590\n  entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nFix this by adding an early check on route_shortcircuit() when protocol\nis ETH_P_IPV6. Note that ipv6_mod_enabled() cannot be used here because\nVXLAN can be built-in even when IPv6 is built as a module.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-476"],"references":["https://git.kernel.org/stable/c/168ff39e4758897d2eee4756977d036d52884c7e","https://git.kernel.org/stable/c/5f93e6b4d12bd3a4517a6d447ea675f448f21434","https://git.kernel.org/stable/c/649e2bb74da54c96cf20729001e283626a2fefa0","https://git.kernel.org/stable/c/abcd48ecdeb2e12eccb8339a35534c757782afcd","https://git.kernel.org/stable/c/b5190fcd75a1f1785c766a8d1e44d3938e168f45"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:26:19.218427112+00:00"},"epss":{"cve":"CVE-2026-23293","score":0.00134,"percentile":0.02864,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}