{"id":"AZL-90561","summary":"CVE-2026-52931 affecting package kernel for versions less than 6.6.143.1-1","details":"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-\u003erole immediately after the\nlookup and bailing out if it is not BATADV_TP_SENDER, before any of\nthose members are accessed.","modified":"2026-08-28T17:48:06.114094588Z","published":"2026-06-24T08:16:23Z","upstream":["CVE-2026-52931"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-52931"}],"affected":[{"package":{"name":"kernel","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.6.143.1-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-90561.json"}}],"schema_version":"1.9.0"}