ghsa-q3wc-vx42-5j3g
Vulnerability from github
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": [],
"aliases": [
"CVE-2025-38006"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-06-18T10:15:31Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mctp: Don\u0027t access ifa_index when missing\n\nIn mctp_dump_addrinfo, ifa_index can be used to filter interfaces, but\nonly when the struct ifaddrmsg is provided. Otherwise it will be\ncomparing to uninitialised memory - reproducible in the syzkaller case from\ndhcpd, or busybox \"ip addr show\".\n\nThe kernel MCTP implementation has always filtered by ifa_index, so\nexisting userspace programs expecting to dump MCTP addresses must\nalready be passing a valid ifa_index value (either 0 or a real index).\n\nBUG: KMSAN: uninit-value in mctp_dump_addrinfo+0x208/0xac0 net/mctp/device.c:128\n mctp_dump_addrinfo+0x208/0xac0 net/mctp/device.c:128\n rtnl_dump_all+0x3ec/0x5b0 net/core/rtnetlink.c:4380\n rtnl_dumpit+0xd5/0x2f0 net/core/rtnetlink.c:6824\n netlink_dump+0x97b/0x1690 net/netlink/af_netlink.c:2309",
"id": "GHSA-q3wc-vx42-5j3g",
"modified": "2025-06-18T12:30:30Z",
"published": "2025-06-18T12:30:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38006"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/24fa213dffa470166ec014f979f36c6ff44afb45"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/acab78ae12c7fefb4f3bfe22e00770a5faa42724"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d4d1561d17eb72908e4489c0900d96e0484fac20"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f11cf946c0a92c560a890d68e4775723353599e1"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.