Skip to content
CVE PROGRAM SOURCE RECORDUnscored

CVE-2025-38006

net: mctp: Don't access ifa_index when missing

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
Linux

Description

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

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 583be982d93479ea3d85091b0fd0b01201ede87d to < 8ef7b3f0db69e2f4a80be351f6aee9a4c2332ef9affected
  • 583be982d93479ea3d85091b0fd0b01201ede87d to < acab78ae12c7fefb4f3bfe22e00770a5faa42724affected
  • 583be982d93479ea3d85091b0fd0b01201ede87d to < d4d1561d17eb72908e4489c0900d96e0484fac20affected
  • 583be982d93479ea3d85091b0fd0b01201ede87d to < 24fa213dffa470166ec014f979f36c6ff44afb45affected
  • 583be982d93479ea3d85091b0fd0b01201ede87d to < f11cf946c0a92c560a890d68e4775723353599e1affected

Linux Linux

Default version status: affected

  • 5.15affected
  • 0 to < 5.15unaffected
  • 5.15.203 to ≤ 5.15.*unaffected
  • 6.6.92 to ≤ 6.6.*unaffected
  • 6.12.30 to ≤ 6.12.*unaffected
  • 6.14.8 to ≤ 6.14.*unaffected
  • 6.15 to ≤ *unaffected

References