{"id":"CVE-2026-52931","revision":"79981025c3af495b97d7cc2ab2f4415b","records":[{"revision":"79981025c3af495b97d7cc2ab2f4415b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-52931","aliases":[],"title":"batman-adv: tp_meter: avoid use of uninit sender vars","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: tp_meter: avoid use of uninit sender vars\n\nbatadv_tp_recv_ack() and batadv_tp_stop() are only valid for tp_vars in the\nBATADV_TP_SENDER role. When called with a BATADV_TP_RECEIVER role, it\nproceeds to read sender-only members that were never initialized, leading\nto undefined behavior.\n\nThis can be triggered when a node that is currently acting as a receiver in\nan ongoing tp_meter session receives a malicious ACK packet.\n\nGuard against this by checking tp_vars->role immediately after the\nlookup and bailing out if it is not BATADV_TP_SENDER, before any of\nthose members are accessed.","state":0,"publishedAt":"2026-06-24T07:14:23.349+00:00","modifiedAt":"2026-10-19T19:47:08.135+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/tp_meter.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"33a3bb4a3345bb511f9c69c913da95d4693e2a4e\",\n                            \"lessThan\": \"0e388af04b3958b178a1b979527f93eb46ea1fee\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"33a3bb4a3345bb511f9c69c913da95d4693e2a4e\",\n                            \"lessThan\": \"1a21c055f66e78973712a4a1be2a554f1ee2e4f4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"33a3bb4a3345bb511f9c69c913da95d4693e2a4e\",\n                            \"lessThan\": \"9884c9c02d3c90e9215db3c5128f59045d20ae91\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"33a3bb4a3345bb511f9c69c913da95d4693e2a4e\",\n                            \"lessThan\": \"53f931e0146ae5bdab4cba302646827d06b3794b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"33a3bb4a3345bb511f9c69c913da95d4693e2a4e\",\n                            \"lessThan\": \"ecdaa3e4d91040206afe21bc8a0d1198a0971ff3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"33a3bb4a3345bb511f9c69c913da95d4693e2a4e\",\n                            \"lessThan\": \"dc2ae5fbd2dadc26735092f140b246841d969a11\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"33a3bb4a3345bb511f9c69c913da95d4693e2a4e\",\n                            \"lessThan\": \"85397e48afe6be83ffca5ad3f4792296bfc81d3d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"33a3bb4a3345bb511f9c69c913da95d4693e2a4e\",\n                            \"lessThan\": \"6c65cf23d4c6170fcf5714c32aa64689718cb142\",\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/tp_meter.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.8\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.8\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.258\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.209\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.175\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.142\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.92\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.34\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0.11\",\n                            \"lessThanOrEqual\": \"7.0.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1\",\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/0e388af04b3958b178a1b979527f93eb46ea1fee","https://git.kernel.org/stable/c/1a21c055f66e78973712a4a1be2a554f1ee2e4f4","https://git.kernel.org/stable/c/9884c9c02d3c90e9215db3c5128f59045d20ae91","https://git.kernel.org/stable/c/53f931e0146ae5bdab4cba302646827d06b3794b","https://git.kernel.org/stable/c/ecdaa3e4d91040206afe21bc8a0d1198a0971ff3","https://git.kernel.org/stable/c/dc2ae5fbd2dadc26735092f140b246841d969a11","https://git.kernel.org/stable/c/85397e48afe6be83ffca5ad3f4792296bfc81d3d","https://git.kernel.org/stable/c/6c65cf23d4c6170fcf5714c32aa64689718cb142"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-52931","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-52931","identifiers":["CVE-2026-52931"]},"retained":false,"historicalAffected":[]}],"coverage":[]}