{"cve":"CVE-2026-93204","nvd":{"published":"2026-09-17T17:18:16.773","modified":"2026-10-19T10:17:11.140","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: dat: atomically update mac addresses\n\nWhen a MAC address is updated in batadv_dat_entry_add(), it is done using a\nsimple copy function. A parallel reader might only see parts of this\nupdate. In worst case, the reader is transporting the half updated MAC\naddress over the network or is creating an ARP response using it -\npoisoning the ARP cache.\n\natomic64_t can be used to store the 48 bit of a mac address. A reader will\nthen either see the old mac address or the new one - never a mixture of\nboth.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/159360a0de831845c4500b4f8638decdcd624040","https://git.kernel.org/stable/c/1674855a5b6eacfe35f4db3095d7055c25467274","https://git.kernel.org/stable/c/181012b3d29c51197c235ee5871fc7512c736855","https://git.kernel.org/stable/c/259db2c04586d40b82c5c3002b1e28b0698a0bb7","https://git.kernel.org/stable/c/66238e2a74eca5dabf85b0cd2c3c944e474dc2fd"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:55:23.253742848+00:00"},"epss":{"cve":"CVE-2026-93204","score":0.00201,"percentile":0.09948,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}