CVE-2026-45930

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux583be982d93479ea3d85091b0fd0b01201ede87d < b37da3ac099e145bcd3be82c745a8d335772e3afaffected
LinuxLinux583be982d93479ea3d85091b0fd0b01201ede87d < c4f840437e7641764de15f2de951ac8335d641f1affected
LinuxLinux583be982d93479ea3d85091b0fd0b01201ede87d < 963537a26fd892f7e414a091f807b44aeee97a7daffected
LinuxLinux583be982d93479ea3d85091b0fd0b01201ede87d < 976612471a9e6ead6ceffc241e4d0a1aac90b36aaffected
LinuxLinux583be982d93479ea3d85091b0fd0b01201ede87d < 54ed418de62a148a655262da682a050fa05f7924affected
LinuxLinux583be982d93479ea3d85091b0fd0b01201ede87d < 6fb6a97c86abb8592158088afaea0eb464cf9de1affected
LinuxLinux583be982d93479ea3d85091b0fd0b01201ede87d < a6a9bc544b675d8b5180f2718ec985ad267b5cbfaffected
LinuxLinux5.15affected
LinuxLinux0 < 5.15unaffected
LinuxLinux5.15.210 <= 5.15.*unaffected
LinuxLinux6.1.176 <= 6.1.*unaffected
LinuxLinux6.6.143 <= 6.6.*unaffected
LinuxLinux6.12.93 <= 6.12.*unaffected
LinuxLinux6.18.35 <= 6.18.*unaffected
LinuxLinux6.19.4 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References