{"id":"CVE-2026-99064","revision":"2233c6920c9b4f3f8c48011432fdeb79","records":[{"revision":"2233c6920c9b4f3f8c48011432fdeb79","observedAt":"2026-10-23T16:01:20.601+00:00","statement":{"source":"cve-program","id":"CVE-2026-99064","aliases":[],"title":"cipso: adjust cached option offsets when removing CIPSO","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncipso: adjust cached option offsets when removing CIPSO\n\ncipso_v4_skbuff_delattr() removes the CIPSO bytes but does not adjust\ncached offsets for options that follow them.\n\nFor example, with a valid 10-byte CIPSO option followed by a seven-byte\nRR option, parsing records rr at offset 30.  Removing CIPSO moves RR to\noffset 20, while the cached offset remains 30.  Consumers such as\nip_forward_options() and __ip_options_echo() then access the wrong bytes;\nthe latter may interpret packet data as the option length and copy it into\nfixed-size option storage.\n\nMirror cipso_v4_delopt() and subtract cipso_len from the srr, rr, ts and\nrouter_alert offsets when they follow CIPSO.  cipso_len is the distance\nthe first memmove() shifts those options.  The later header move and\nnetwork-header reset relocate the bytes and their offset base together.","state":0,"publishedAt":"2026-10-23T12:23:05.854+00:00","modifiedAt":"2026-10-23T12:23:05.854+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/cipso_ipv4.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"89aa3619d141d6cfb6040a561aebb6d99d3e2285\",\n                            \"lessThan\": \"b965977126a90e01825814c859ba4788691eddd3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"89aa3619d141d6cfb6040a561aebb6d99d3e2285\",\n                            \"lessThan\": \"2200fe1d6148b78e1b8f00f4b2bd47760015077f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"89aa3619d141d6cfb6040a561aebb6d99d3e2285\",\n                            \"lessThan\": \"6e49d611a9cfbaac927b8fa80ebd4f6b1f37ada0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"89aa3619d141d6cfb6040a561aebb6d99d3e2285\",\n                            \"lessThan\": \"6d25ffca055a77787c21a36b66c253f76239411b\",\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/cipso_ipv4.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.10\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.10\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.113\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.57\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.11\",\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/b965977126a90e01825814c859ba4788691eddd3","https://git.kernel.org/stable/c/2200fe1d6148b78e1b8f00f4b2bd47760015077f","https://git.kernel.org/stable/c/6e49d611a9cfbaac927b8fa80ebd4f6b1f37ada0","https://git.kernel.org/stable/c/6d25ffca055a77787c21a36b66c253f76239411b"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-99064","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-99064","identifiers":["CVE-2026-99064"]},"retained":false,"historicalAffected":[]}],"coverage":[]}