{"id":"CVE-2026-23048","summary":"udp: call skb_orphan() before skb_attempt_defer_free()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nudp: call skb_orphan() before skb_attempt_defer_free()\n\nStandard UDP receive path does not use skb-\u003edestructor.\n\nBut skmsg layer does use it, since it calls skb_set_owner_sk_safe()\nfrom udp_read_skb().\n\nThis then triggers this warning in skb_attempt_defer_free():\n\n    DEBUG_NET_WARN_ON_ONCE(skb-\u003edestructor);\n\nWe must call skb_orphan() to fix this issue.","modified":"2026-08-12T03:51:20.784720393Z","published":"2026-02-04T16:00:30.232Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23048.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0c63d5683eae6a7b4d81382bcbecb2a19feff90d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e5c8eda39a9fc1547d1398d707aa06c1d080abdd"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23048.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23048"},{"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":"6471658dc66c670580a7616e75f51b52917e7883"},{"fixed":"0c63d5683eae6a7b4d81382bcbecb2a19feff90d"},{"fixed":"e5c8eda39a9fc1547d1398d707aa06c1d080abdd"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23048.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.18.0"},{"fixed":"6.18.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23048.json"}}],"schema_version":"1.9.0"}