{"id":"CVE-2026-100070","revision":"d6695f2d7197422abf507e272af475d4","records":[{"revision":"d6695f2d7197422abf507e272af475d4","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-100070","aliases":[],"title":"netfilter: nf_nat_sip: rewind offset when NAT shrinks the packet","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_nat_sip: rewind offset when NAT shrinks the packet\n\nsashiko says:\n If map_addr() changes the packet length, such as when the public NAT IP\n string is shorter or longer than the internal IP, coff will still point to\n the offset relative to the pre-mangled packet.\n If the packet shrinks, coff could overshoot the correct position,\n potentially causing the next ct_sip_parse_header_uri() call to silently\n skip bytes and miss subsequent Contact headers. Could this lead to a\n failure to NAT those subsequent headers and leak internal network details?","state":0,"publishedAt":"2026-09-25T13:06:44.311+00:00","modifiedAt":"2026-10-19T08:43:02.432+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/netfilter/nf_nat_sip.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"c978cd3a937141deaf7995b849824af6dacdeae7\",\n                            \"lessThan\": \"6828aca3d82717c2fda92af81c0dda642bc2b465\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c978cd3a937141deaf7995b849824af6dacdeae7\",\n                            \"lessThan\": \"2703f5ea8d85bc729f433ac09ee902084c947122\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c978cd3a937141deaf7995b849824af6dacdeae7\",\n                            \"lessThan\": \"0f4d30e2e49f343fc28ba1e259fd22969b940c46\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c978cd3a937141deaf7995b849824af6dacdeae7\",\n                            \"lessThan\": \"810da5a63549531da78348b0a4545042d84e01e2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c978cd3a937141deaf7995b849824af6dacdeae7\",\n                            \"lessThan\": \"668cc1c30caedc63070b10d17d5514748988a140\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c978cd3a937141deaf7995b849824af6dacdeae7\",\n                            \"lessThan\": \"e70d48fcf8382581162608a4a322919bfd22aef3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c978cd3a937141deaf7995b849824af6dacdeae7\",\n                            \"lessThan\": \"c408d416618ebb8a95e3097a13f3b793ea9272ee\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c978cd3a937141deaf7995b849824af6dacdeae7\",\n                            \"lessThan\": \"16aecbe3036f6097c26b51b12e4c1cf207769690\",\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/netfilter/nf_nat_sip.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.26\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.26\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.270\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.221\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.52\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/6828aca3d82717c2fda92af81c0dda642bc2b465","https://git.kernel.org/stable/c/2703f5ea8d85bc729f433ac09ee902084c947122","https://git.kernel.org/stable/c/0f4d30e2e49f343fc28ba1e259fd22969b940c46","https://git.kernel.org/stable/c/810da5a63549531da78348b0a4545042d84e01e2","https://git.kernel.org/stable/c/668cc1c30caedc63070b10d17d5514748988a140","https://git.kernel.org/stable/c/e70d48fcf8382581162608a4a322919bfd22aef3","https://git.kernel.org/stable/c/c408d416618ebb8a95e3097a13f3b793ea9272ee","https://git.kernel.org/stable/c/16aecbe3036f6097c26b51b12e4c1cf207769690"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-100070","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-100070","identifiers":["CVE-2026-100070"]},"retained":false,"historicalAffected":[]}],"coverage":[]}