CVE-2025-38006

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  2. Vulnerabilities (CVE)
  3. CVE-2025-38006

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

I

n 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

References
Link Resource
https://git.kernel.org/stable/c/24fa213dffa470166ec014f979f36c6ff44afb45 Patch
https://git.kernel.org/stable/c/acab78ae12c7fefb4f3bfe22e00770a5faa42724 Patch
https://git.kernel.org/stable/c/d4d1561d17eb72908e4489c0900d96e0484fac20 Patch
https://git.kernel.org/stable/c/f11cf946c0a92c560a890d68e4775723353599e1 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc6:*:*:*:*:*:*
History

14 Nov 2025, 16:42

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: mctp: No acceder a ifa_index si falta. En mctp_dump_addrinfo, ifa_index puede usarse para filtrar interfaces, pero solo cuando se proporciona la estructura ifaddrmsg. De lo contrario, se comparará con memoria no inicializada, lo cual es reproducible en el caso de syzkaller desde dhcpd o "ip addr show" de busybox. La implementación de MCTP del kernel siempre ha filtrado por ifa_index, por lo que los programas de espacio de usuario que esperan volcar direcciones MCTP ya deben estar pasando un valor válido de ifa_index (0 o un índice real). ERROR: KMSAN: valor no inicializado en 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
CWE CWE-908
First Time Linux linux Kernel
Linux
References () https://git.kernel.org/stable/c/24fa213dffa470166ec014f979f36c6ff44afb45 - () https://git.kernel.org/stable/c/24fa213dffa470166ec014f979f36c6ff44afb45 - Patch
References () https://git.kernel.org/stable/c/acab78ae12c7fefb4f3bfe22e00770a5faa42724 - () https://git.kernel.org/stable/c/acab78ae12c7fefb4f3bfe22e00770a5faa42724 - Patch
References () https://git.kernel.org/stable/c/d4d1561d17eb72908e4489c0900d96e0484fac20 - () https://git.kernel.org/stable/c/d4d1561d17eb72908e4489c0900d96e0484fac20 - Patch
References () https://git.kernel.org/stable/c/f11cf946c0a92c560a890d68e4775723353599e1 - () https://git.kernel.org/stable/c/f11cf946c0a92c560a890d68e4775723353599e1 - Patch
CPE cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5

18 Jun 2025, 10:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-06-18 10:15

Updated : 2025-11-14 16:42

NVD link : CVE-2025-38006

Mitre link : CVE-2025-38006

CVE.ORG link : CVE-2025-38006

JSON object : View

Products Affected

linux

CWE
CWE-908

Use of Uninitialized Resource