{"id":"CVE-2026-74705","revision":"ce6eb3fd0ac641d8ae28840041d35216","records":[{"revision":"ce6eb3fd0ac641d8ae28840041d35216","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-74705","aliases":[],"title":"udp: fix potential use-after-free in tunnel segmentation","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nudp: fix potential use-after-free in tunnel segmentation\n\n__skb_udp_tunnel_segment() gets the UDP header before ensuring the\ntunnel header is in the skb head. If the pull reallocates skb->head,\nthe saved UDP header pointer is no longer valid.\n\nGet the UDP header after the pull to avoid a potential use-after-free.","state":0,"publishedAt":"2026-08-22T15:33:04.11+00:00","modifiedAt":"2026-10-16T19:16:10.609+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/ipv4/udp_offload.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"dbef491ebe7f3a4fb1b9111878b86a426fd540b7\",\n                            \"lessThan\": \"6a733a38b983d8c2e222f13968209010cf44de87\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"dbef491ebe7f3a4fb1b9111878b86a426fd540b7\",\n                            \"lessThan\": \"19d89b13a43640b2da2f277ee462d919d988cb6f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"dbef491ebe7f3a4fb1b9111878b86a426fd540b7\",\n                            \"lessThan\": \"b3df61bb745eb5201eac22679a2839d4ccbf3442\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"dbef491ebe7f3a4fb1b9111878b86a426fd540b7\",\n                            \"lessThan\": \"1ae134c012e10384cdac420b5cc6e0615cde0b55\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"dbef491ebe7f3a4fb1b9111878b86a426fd540b7\",\n                            \"lessThan\": \"5161e67c561c4f28a5d9335a6e859b02511de92b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"dbef491ebe7f3a4fb1b9111878b86a426fd540b7\",\n                            \"lessThan\": \"64d322c288577793eedd352b96ef75234ed380fe\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"dbef491ebe7f3a4fb1b9111878b86a426fd540b7\",\n                            \"lessThan\": \"588d4a6795d99d080f74ef0b5f391ea8c453ae5d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"dbef491ebe7f3a4fb1b9111878b86a426fd540b7\",\n                            \"lessThan\": \"d0f86fb36eb260abd10007b62c9dcc1028e03e61\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/ipv4/udp_offload.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.6\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.6\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.265\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.216\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.183\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.152\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.104\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.45\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.9\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","score":10,"severity":"CRITICAL"}],"references":["https://git.kernel.org/stable/c/6a733a38b983d8c2e222f13968209010cf44de87","https://git.kernel.org/stable/c/19d89b13a43640b2da2f277ee462d919d988cb6f","https://git.kernel.org/stable/c/b3df61bb745eb5201eac22679a2839d4ccbf3442","https://git.kernel.org/stable/c/1ae134c012e10384cdac420b5cc6e0615cde0b55","https://git.kernel.org/stable/c/5161e67c561c4f28a5d9335a6e859b02511de92b","https://git.kernel.org/stable/c/64d322c288577793eedd352b96ef75234ed380fe","https://git.kernel.org/stable/c/588d4a6795d99d080f74ef0b5f391ea8c453ae5d","https://git.kernel.org/stable/c/d0f86fb36eb260abd10007b62c9dcc1028e03e61"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74705","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-74705","identifiers":["CVE-2026-74705"]},"retained":false,"historicalAffected":[]}],"coverage":[]}