{"id":"CVE-2026-93204","revision":"f1b1c58802c2415e8a75ec673cdfaefe","records":[{"revision":"f1b1c58802c2415e8a75ec673cdfaefe","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-93204","aliases":[],"title":"batman-adv: dat: atomically update mac addresses","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.","state":0,"publishedAt":"2026-09-17T16:12:24.403+00:00","modifiedAt":"2026-10-19T09:07:16.519+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/distributed-arp-table.c\",\n                        \"net/batman-adv/types.h\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2f1dfbe185075a50dc8f0490a136377af53a1c62\",\n                            \"lessThan\": \"181012b3d29c51197c235ee5871fc7512c736855\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2f1dfbe185075a50dc8f0490a136377af53a1c62\",\n                            \"lessThan\": \"159360a0de831845c4500b4f8638decdcd624040\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2f1dfbe185075a50dc8f0490a136377af53a1c62\",\n                            \"lessThan\": \"259db2c04586d40b82c5c3002b1e28b0698a0bb7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2f1dfbe185075a50dc8f0490a136377af53a1c62\",\n                            \"lessThan\": \"1674855a5b6eacfe35f4db3095d7055c25467274\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2f1dfbe185075a50dc8f0490a136377af53a1c62\",\n                            \"lessThan\": \"66238e2a74eca5dabf85b0cd2c3c944e474dc2fd\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2f1dfbe185075a50dc8f0490a136377af53a1c62\",\n                            \"lessThan\": \"a5e4d6cb4f6848b8906c1c493f99a8ccc0638515\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2f1dfbe185075a50dc8f0490a136377af53a1c62\",\n                            \"lessThan\": \"f68038c77a2f38c09c7e2e4f7fa1f4e246fdf2c9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2f1dfbe185075a50dc8f0490a136377af53a1c62\",\n                            \"lessThan\": \"e6de568d3eda3e3c01c868fabd7a9535d5ee4a73\",\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/distributed-arp-table.c\",\n                        \"net/batman-adv/types.h\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3.8\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.8\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.271\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.221\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.52\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\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/181012b3d29c51197c235ee5871fc7512c736855","https://git.kernel.org/stable/c/159360a0de831845c4500b4f8638decdcd624040","https://git.kernel.org/stable/c/259db2c04586d40b82c5c3002b1e28b0698a0bb7","https://git.kernel.org/stable/c/1674855a5b6eacfe35f4db3095d7055c25467274","https://git.kernel.org/stable/c/66238e2a74eca5dabf85b0cd2c3c944e474dc2fd","https://git.kernel.org/stable/c/a5e4d6cb4f6848b8906c1c493f99a8ccc0638515","https://git.kernel.org/stable/c/f68038c77a2f38c09c7e2e4f7fa1f4e246fdf2c9","https://git.kernel.org/stable/c/e6de568d3eda3e3c01c868fabd7a9535d5ee4a73"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-93204","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-93204","identifiers":["CVE-2026-93204"]},"retained":false,"historicalAffected":[]}],"coverage":[]}