CVE-2025-38006None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: net: mctp: Don't access ifa_index when missing In mctp_dump_addrinfo, ifa_index can be used to filter interfaces, but only when the struct ifaddrmsg is provided. Other…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Nov 3.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
In the Linux kernel, the following vulnerability has been resolved:
net: mctp: Don't access ifa_index when missing
In mctp_dump_addrinfo, ifa_index can be used to filter interfaces, but only when the struct ifaddrmsg is provided. Otherwise it will be comparing to uninitialised memory - reproducible in the syzkaller case from dhcpd, or busybox "ip addr show".
The kernel MCTP implementation has always filtered by ifa_index, so existing userspace programs expecting to dump MCTP addresses must already be passing a valid ifa_index value (either 0 or a real index).
BUG: KMSAN: uninit-value in mctp_dump_addrinfo+0x208/0xac0 net/mctp/device.c:128 mctp_dump_addrinfo+0x208/0xac0 net/mctp/device.c:128 rtnl_dump_all+0x3ec/0x5b0 net/core/rtnetlink.c:4380 rtnl_dumpit+0xd5/0x2f0 net/core/rtnetlink.c:6824 netlink_dump+0x97b/0x1690 net/netlink/af_netlink.c:2309
Linux >= 583be982d93479ea3d85091b0fd0b01201ede87d < 8ef7b3f0db69e2f4a80be351f6aee9a4c2332ef9Linux >= 583be982d93479ea3d85091b0fd0b01201ede87d < d22efcd246a7688599eefcf8e5c7985a3854ef5dLinux >= 583be982d93479ea3d85091b0fd0b01201ede87d < acab78ae12c7fefb4f3bfe22e00770a5faa42724Linux >= 583be982d93479ea3d85091b0fd0b01201ede87d < d4d1561d17eb72908e4489c0900d96e0484fac20Linux >= 583be982d93479ea3d85091b0fd0b01201ede87d < 24fa213dffa470166ec014f979f36c6ff44afb45Linux >= 583be982d93479ea3d85091b0fd0b01201ede87d < f11cf946c0a92c560a890d68e4775723353599e1Linux 5.15Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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