In the Linux kernel, the following vulnerability has been resolved:
batman-adv: dat: atomically update mac addresses
When a MAC address is updated in batadv_dat_entry_add(), it is done using a
simple copy function. A parallel reader might only see parts of this
update. In worst case, the reader is transporting the half updated MAC
address over the network or is creating an ARP response using it -
poisoning the ARP cache.
atomic64_t can be used to store the 48 bit of a mac address. A reader will
then either see the old mac address or the new one - never a mixture of
both.
batman-adv: dat: atomically update mac addresses
When a MAC address is updated in batadv_dat_entry_add(), it is done using a
simple copy function. A parallel reader might only see parts of this
update. In worst case, the reader is transporting the half updated MAC
address over the network or is creating an ARP response using it -
poisoning the ARP cache.
atomic64_t can be used to store the 48 bit of a mac address. A reader will
then either see the old mac address or the new one - never a mixture of
both.
Metrics
Affected Vendors & Products
Advisories
No advisories yet.
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Thu, 17 Sep 2026 16:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | In the Linux kernel, the following vulnerability has been resolved: batman-adv: dat: atomically update mac addresses When a MAC address is updated in batadv_dat_entry_add(), it is done using a simple copy function. A parallel reader might only see parts of this update. In worst case, the reader is transporting the half updated MAC address over the network or is creating an ARP response using it - poisoning the ARP cache. atomic64_t can be used to store the 48 bit of a mac address. A reader will then either see the old mac address or the new one - never a mixture of both. | |
| Title | batman-adv: dat: atomically update mac addresses | |
| First Time appeared |
Linux
Linux linux Kernel |
|
| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Linux
Linux linux Kernel |
|
| References |
|
|
Projects
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MITRE
Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2026-09-17T16:12:24.403Z
Reserved: 2026-09-17T16:02:15.093Z
Link: CVE-2026-93204
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-09-17T17:18:16.773
Modified: 2026-09-17T17:18:16.773
Link: CVE-2026-93204
Redhat
No data.
OpenCVE Enrichment
No data.
Weaknesses
No weakness.