{"id":"CVE-2026-31659","revision":"a18cb52fdf9546fe9f1fed6f62af2595","records":[{"revision":"a18cb52fdf9546fe9f1fed6f62af2595","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-31659","aliases":[],"title":"batman-adv: reject oversized global TT response buffers","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: reject oversized global TT response buffers\n\nbatadv_tt_prepare_tvlv_global_data() builds the allocation length for a\nglobal TT response in 16-bit temporaries. When a remote originator\nadvertises a large enough global TT, the TT payload length plus the VLAN\nheader offset can exceed 65535 and wrap before kmalloc().\n\nThe full-table response path still uses the original TT payload length when\nit fills tt_change, so the wrapped allocation is too small and\nbatadv_tt_prepare_tvlv_global_data() writes past the end of the heap object\nbefore the later packet-size check runs.\n\nFix this by rejecting TT responses whose TVLV value length cannot fit in\nthe 16-bit TVLV payload length field.","state":0,"publishedAt":"2026-04-24T14:45:10.254+00:00","modifiedAt":"2026-10-19T18:56:02.093+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/batman-adv/translation-table.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"7ea7b4a142758deaf46c1af0ca9ceca6dd55138b\",\n                            \"lessThan\": \"7e5d007e0df946bffb8542fb112e0044014a5897\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7ea7b4a142758deaf46c1af0ca9ceca6dd55138b\",\n                            \"lessThan\": \"2997f4bd1f982e7013709946e00be89b507693fa\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7ea7b4a142758deaf46c1af0ca9ceca6dd55138b\",\n                            \"lessThan\": \"95c71365a2222908441b54d6f2c315e0c79fcec3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7ea7b4a142758deaf46c1af0ca9ceca6dd55138b\",\n                            \"lessThan\": \"69d61639bc7e963c3b645e570279d731e7c89062\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7ea7b4a142758deaf46c1af0ca9ceca6dd55138b\",\n                            \"lessThan\": \"f970646b9a39539d1bac86822ac78b5915455ea9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7ea7b4a142758deaf46c1af0ca9ceca6dd55138b\",\n                            \"lessThan\": \"de6c1dc3c7d01a152607e6fcecee4d5288283f10\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7ea7b4a142758deaf46c1af0ca9ceca6dd55138b\",\n                            \"lessThan\": \"cf2199171ef799ca7270019125f4a91bd20ad4d9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7ea7b4a142758deaf46c1af0ca9ceca6dd55138b\",\n                            \"lessThan\": \"3a359bf5c61d52e7f09754108309d637532164a6\",\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/batman-adv/translation-table.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3.13\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.13\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.253\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.203\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.169\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.135\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.82\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.23\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19.13\",\n                            \"lessThanOrEqual\": \"6.19.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0\",\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:U/C:H/I:H/A:H","score":9.8,"severity":"CRITICAL"}],"references":["https://git.kernel.org/stable/c/7e5d007e0df946bffb8542fb112e0044014a5897","https://git.kernel.org/stable/c/2997f4bd1f982e7013709946e00be89b507693fa","https://git.kernel.org/stable/c/95c71365a2222908441b54d6f2c315e0c79fcec3","https://git.kernel.org/stable/c/69d61639bc7e963c3b645e570279d731e7c89062","https://git.kernel.org/stable/c/f970646b9a39539d1bac86822ac78b5915455ea9","https://git.kernel.org/stable/c/de6c1dc3c7d01a152607e6fcecee4d5288283f10","https://git.kernel.org/stable/c/cf2199171ef799ca7270019125f4a91bd20ad4d9","https://git.kernel.org/stable/c/3a359bf5c61d52e7f09754108309d637532164a6"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-31659","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-31659","identifiers":["CVE-2026-31659"]},"retained":false,"historicalAffected":[]}],"coverage":[]}