{"id":"CVE-2026-93204","title":"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","summary":"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 mi…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 2f1dfbe185075a50dc8f0490a136377af53a1c62 < 159360a0de831845c4500b4f8638decdcd624040","Linux >= 2f1dfbe185075a50dc8f0490a136377af53a1c62 < 259db2c04586d40b82c5c3002b1e28b0698a0bb7","Linux >= 2f1dfbe185075a50dc8f0490a136377af53a1c62 < 1674855a5b6eacfe35f4db3095d7055c25467274","Linux >= 2f1dfbe185075a50dc8f0490a136377af53a1c62 < 66238e2a74eca5dabf85b0cd2c3c944e474dc2fd","Linux >= 2f1dfbe185075a50dc8f0490a136377af53a1c62 < a5e4d6cb4f6848b8906c1c493f99a8ccc0638515","Linux >= 2f1dfbe185075a50dc8f0490a136377af53a1c62 < f68038c77a2f38c09c7e2e4f7fa1f4e246fdf2c9","Linux >= 2f1dfbe185075a50dc8f0490a136377af53a1c62 < e6de568d3eda3e3c01c868fabd7a9535d5ee4a73","Linux 3.8"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:18:16.773","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-93204","references":[{"url":"https://git.kernel.org/stable/c/159360a0de831845c4500b4f8638decdcd624040","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/1674855a5b6eacfe35f4db3095d7055c25467274","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/259db2c04586d40b82c5c3002b1e28b0698a0bb7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/66238e2a74eca5dabf85b0cd2c3c944e474dc2fd","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a5e4d6cb4f6848b8906c1c493f99a8ccc0638515","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e6de568d3eda3e3c01c868fabd7a9535d5ee4a73","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f68038c77a2f38c09c7e2e4f7fa1f4e246fdf2c9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-17T16:21:47.720Z","epss":0.00192,"epssPercentile":0.09105,"slug":"CVE-2026-93204","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}