{"id":"CVE-2026-23083","summary":"fou: Don't allow 0 for FOU_ATTR_IPPROTO.","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nfou: Don't allow 0 for FOU_ATTR_IPPROTO.\n\nfou_udp_recv() has the same problem mentioned in the previous\npatch.\n\nIf FOU_ATTR_IPPROTO is set to 0, skb is not freed by\nfou_udp_recv() nor \"resubmit\"-ted in ip_protocol_deliver_rcu().\n\nLet's forbid 0 for FOU_ATTR_IPPROTO.","modified":"2026-04-02T17:29:51.745498273Z","published":"2026-02-04T16:08:07.561Z","related":["SUSE-SU-2026:0962-1","SUSE-SU-2026:1078-1","SUSE-SU-2026:1081-1","SUSE-SU-2026:20667-1","SUSE-SU-2026:20720-1","SUSE-SU-2026:20838-1","SUSE-SU-2026:20845-1","SUSE-SU-2026:20876-1","SUSE-SU-2026:20931-1","openSUSE-SU-2026:20416-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23083.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1cc98b8887cabb1808d2f4a37cd10a7be7574771"},{"type":"WEB","url":"https://git.kernel.org/stable/c/611ef4bd9c73d9e6d87bed57a635ff1fdd8c91ea"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6e983789b7588ee59cbf303583546c043bad8e19"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7a9bc9e3f42391e4c187e099263cf7a1c4b69ff5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9b75dff8446ec871030d8daf5a69e74f5fe8b956"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b7db31a52c3862a1a32202a273a4c32e7f5f4823"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c7498f9bc390479ccfad7c7f2332237ff4945b03"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23083.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23083"},{"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":"23461551c00628c3f3fe9cf837bf53cf8f212b63"},{"fixed":"c7498f9bc390479ccfad7c7f2332237ff4945b03"},{"fixed":"611ef4bd9c73d9e6d87bed57a635ff1fdd8c91ea"},{"fixed":"6e983789b7588ee59cbf303583546c043bad8e19"},{"fixed":"1cc98b8887cabb1808d2f4a37cd10a7be7574771"},{"fixed":"b7db31a52c3862a1a32202a273a4c32e7f5f4823"},{"fixed":"9b75dff8446ec871030d8daf5a69e74f5fe8b956"},{"fixed":"7a9bc9e3f42391e4c187e099263cf7a1c4b69ff5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23083.json"}}],"schema_version":"1.7.5"}