UNKNOWN NVD
CVE-2026-93204
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_d
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.
References
- https://git.kernel.org/stable/c/159360a0de831845c4500b4f8638decdcd624040
- https://git.kernel.org/stable/c/1674855a5b6eacfe35f4db3095d7055c25467274
- https://git.kernel.org/stable/c/259db2c04586d40b82c5c3002b1e28b0698a0bb7
- https://git.kernel.org/stable/c/66238e2a74eca5dabf85b0cd2c3c944e474dc2fd
- https://git.kernel.org/stable/c/a5e4d6cb4f6848b8906c1c493f99a8ccc0638515
This unknown severity vulnerability was published on 2026-09-17 via NVD.
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