CVE-2026-45930 PUBLISHED

net: mctp: ensure our nlmsg responses are initialised

Assigner: Linux
Reserved: 13.05.2026 Published: 27.05.2026 Updated: 27.05.2026

In the Linux kernel, the following vulnerability has been resolved:

net: mctp: ensure our nlmsg responses are initialised

Syed Faraz Abrar (@farazsth98) from Zellic, and Pumpkin (@u1f383) from DEVCORE Research Team working with Trend Micro Zero Day Initiative report that a RTM_GETNEIGH will return uninitalised data in the pad bytes of the ndmsg data.

Ensure we're initialising the netlink data to zero, in the link, addr and neigh response messages.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 583be982d93479ea3d85091b0fd0b01201ede87d to 6fb6a97c86abb8592158088afaea0eb464cf9de1 (excl.)
  • affected from 583be982d93479ea3d85091b0fd0b01201ede87d to a6a9bc544b675d8b5180f2718ec985ad267b5cbf (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 5.15 is affected
  • unaffected from 0 to 5.15 (excl.)
  • unaffected from 6.19.4 to 6.19.* (incl.)
  • unaffected from 7.0 to * (incl.)

References