CVE-2025-71096
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
RDMA/core: Check for the presence of LS_NLA_TYPE_DGID correctly
The netlink response for RDMA_NL_LS_OP_IP_RESOLVE should always have a LS_NLA_TYPE_DGID attribute, it is invalid if it does not.
Use the nl parsing logic properly and call nla_parse_deprecated() to fill the nlattrs array and then directly index that array to get the data for the DGID. Just fail if it is NULL.
Remove the for loop searching for the nla, and squash the validation and parsing into one function.
Fixes an uninitialized read from the stack triggered by userspace if it does not provide the DGID to a kernel initiated RDMA_NL_LS_OP_IP_RESOLVE query.
Detalles técnicos trazas, registros y código del informe original
BUG: KMSAN: uninit-value in hex_byte_pack include/linux/hex.h:13 [inline]
BUG: KMSAN: uninit-value in ip6_string+0xef4/0x13a0 lib/vsprintf.c:1490
hex_byte_pack include/linux/hex.h:13 [inline]
ip6_string+0xef4/0x13a0 lib/vsprintf.c:1490
ip6_addr_string+0x18a/0x3e0 lib/vsprintf.c:1509
ip_addr_string+0x245/0xee0 lib/vsprintf.c:1633
pointer+0xc09/0x1bd0 lib/vsprintf.c:2542
vsnprintf+0xf8a/0x1bd0 lib/vsprintf.c:2930
vprintk_store+0x3ae/0x1530 kernel/printk/printk.c:2279
vprintk_emit+0x307/0xcd0 kernel/printk/printk.c:2426
vprintk_default+0x3f/0x50 kernel/printk/printk.c:2465
vprintk+0x36/0x50 kernel/printk/printk_safe.c:82
_printk+0x17e/0x1b0 kernel/printk/printk.c:2475
ib_nl_process_good_ip_rsep drivers/infiniband/core/addr.c:128 [inline]
ib_nl_handle_ip_res_resp+0x963/0x9d0 drivers/infiniband/core/addr.c:141
rdma_nl_rcv_msg drivers/infiniband/core/netlink.c:-1 [inline]
rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline]
rdma_nl_rcv+0xefa/0x11c0 drivers/infiniband/core/netlink.c:259
netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
netlink_unicast+0xf04/0x12b0 net/netlink/af_netlink.c:1346
netlink_sendmsg+0x10b3/0x1250 net/netlink/af_netlink.c:1896
sock_sendmsg_nosec net/socket.c:714 [inline]
__sock_sendmsg+0x333/0x3d0 net/socket.c:729
____sys_sendmsg+0x7e0/0xd80 net/socket.c:2617
___sys_sendmsg+0x271/0x3b0 net/socket.c:2671
__sys_sendmsg+0x1aa/0x300 net/socket.c:2703
__compat_sys_sendmsg net/compat.c:346 [inline]
__do_compat_sys_sendmsg net/compat.c:353 [inline]
__se_compat_sys_sendmsg net/compat.c:350 [inline]
__ia32_compat_sys_sendmsg+0xa4/0x100 net/compat.c:350
ia32_sys_call+0x3f6c/0x4310 arch/x86/include/generated/asm/syscalls_32.h:371
do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
__do_fast_syscall_32+0xb0/0x150 arch/x86/entry/syscall_32.c:306
do_fast_syscall_32+0x38/0x80 arch/x86/entry/syscall_32.c:331
do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:3CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.13%
- Percentil entre todas las CVEs puntuadas: 2
- Fecha de la puntuación: 4/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
CWE
- CWE-908
Referencias
- https://git.kernel.org/stable/c/0b948afc1ded88b3562c893114387f34389eeb94
- https://git.kernel.org/stable/c/376f46c8983458ead26cac83aa897a0b78491831
- https://git.kernel.org/stable/c/45532638de5da24c201aa2a9b3dd4b054064de7b
- https://git.kernel.org/stable/c/9d85524789c2f17c0e87de8d596bcccc3683a1fc
- https://git.kernel.org/stable/c/a7b8e876e0ef0232b8076972c57ce9a7286b47ca
- https://git.kernel.org/stable/c/acadd4097d25d6bd472bcb3f9f3eba2b5105d1ec
- https://git.kernel.org/stable/c/bfe10318fc23e0b3f1d0a18dad387d29473a624d
JSON original (NVD)
Mostrar
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"role": "CISA Coordinator",
"options": [
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"exploitation": "none"
},
{
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{
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"version": "2.0.3",
"timestamp": "2026-06-10T20:42:32.937129Z"
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "NONE"
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"impactScore": 3.6,
"exploitabilityScore": 1.8
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"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-908"
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/core: Check for the presence of LS_NLA_TYPE_DGID correctly\n\nThe netlink response for RDMA_NL_LS_OP_IP_RESOLVE should always have a\nLS_NLA_TYPE_DGID attribute, it is invalid if it does not.\n\nUse the nl parsing logic properly and call nla_parse_deprecated() to fill\nthe nlattrs array and then directly index that array to get the data for\nthe DGID. Just fail if it is NULL.\n\nRemove the for loop searching for the nla, and squash the validation and\nparsing into one function.\n\nFixes an uninitialized read from the stack triggered by userspace if it\ndoes not provide the DGID to a kernel initiated RDMA_NL_LS_OP_IP_RESOLVE\nquery.\n\n BUG: KMSAN: uninit-value in hex_byte_pack include/linux/hex.h:13 [inline]\n BUG: KMSAN: uninit-value in ip6_string+0xef4/0x13a0 lib/vsprintf.c:1490\n hex_byte_pack include/linux/hex.h:13 [inline]\n ip6_string+0xef4/0x13a0 lib/vsprintf.c:1490\n ip6_addr_string+0x18a/0x3e0 lib/vsprintf.c:1509\n ip_addr_string+0x245/0xee0 lib/vsprintf.c:1633\n pointer+0xc09/0x1bd0 lib/vsprintf.c:2542\n vsnprintf+0xf8a/0x1bd0 lib/vsprintf.c:2930\n vprintk_store+0x3ae/0x1530 kernel/printk/printk.c:2279\n vprintk_emit+0x307/0xcd0 kernel/printk/printk.c:2426\n vprintk_default+0x3f/0x50 kernel/printk/printk.c:2465\n vprintk+0x36/0x50 kernel/printk/printk_safe.c:82\n _printk+0x17e/0x1b0 kernel/printk/printk.c:2475\n ib_nl_process_good_ip_rsep drivers/infiniband/core/addr.c:128 [inline]\n ib_nl_handle_ip_res_resp+0x963/0x9d0 drivers/infiniband/core/addr.c:141\n rdma_nl_rcv_msg drivers/infiniband/core/netlink.c:-1 [inline]\n rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline]\n rdma_nl_rcv+0xefa/0x11c0 drivers/infiniband/core/netlink.c:259\n netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]\n netlink_unicast+0xf04/0x12b0 net/netlink/af_netlink.c:1346\n netlink_sendmsg+0x10b3/0x1250 net/netlink/af_netlink.c:1896\n sock_sendmsg_nosec net/socket.c:714 [inline]\n __sock_sendmsg+0x333/0x3d0 net/socket.c:729\n ____sys_sendmsg+0x7e0/0xd80 net/socket.c:2617\n ___sys_sendmsg+0x271/0x3b0 net/socket.c:2671\n __sys_sendmsg+0x1aa/0x300 net/socket.c:2703\n __compat_sys_sendmsg net/compat.c:346 [inline]\n __do_compat_sys_sendmsg net/compat.c:353 [inline]\n __se_compat_sys_sendmsg net/compat.c:350 [inline]\n __ia32_compat_sys_sendmsg+0xa4/0x100 net/compat.c:350\n ia32_sys_call+0x3f6c/0x4310 arch/x86/include/generated/asm/syscalls_32.h:371\n do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]\n __do_fast_syscall_32+0xb0/0x150 arch/x86/entry/syscall_32.c:306\n do_fast_syscall_32+0x38/0x80 arch/x86/entry/syscall_32.c:331\n do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:3"
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nRDMA/core: Comprobar la presencia de LS_NLA_TYPE_DGID correctamente\n\nLa respuesta netlink para RDMA_NL_LS_OP_IP_RESOLVE siempre debe tener un atributo LS_NLA_TYPE_DGID; es inválida si no lo tiene.\n\nUsar la lógica de análisis nl correctamente y llamar a nla_parse_deprecated() para rellenar el array nlattrs y luego indexar directamente ese array para obtener los datos para el DGID. Simplemente fallar si es NULL.\n\nEliminar el bucle for que busca el nla, y fusionar la validación y el análisis en una sola función.\n\nCorrige una lectura no inicializada de la pila activada por el espacio de usuario si no proporciona el DGID a una consulta RDMA_NL_LS_OP_IP_RESOLVE iniciada por el kernel.\n\n BUG: KMSAN: uninit-value in hex_byte_pack include/linux/hex.h:13 [inline]\n BUG: KMSAN: uninit-value in ip6_string+0xef4/0x13a0 lib/vsprintf.c:1490\n hex_byte_pack include/linux/hex.h:13 [inline]\n ip6_string+0xef4/0x13a0 lib/vsprintf.c:1490\n ip6_addr_string+0x18a/0x3e0 lib/vsprintf.c:1509\n ip_addr_string+0x245/0xee0 lib/vsprintf.c:1633\n pointer+0xc09/0x1bd0 lib/vsprintf.c:2542\n vsnprintf+0xf8a/0x1bd0 lib/vsprintf.c:2930\n vprintk_store+0x3ae/0x1530 kernel/printk/printk.c:2279\n vprintk_emit+0x307/0xcd0 kernel/printk/printk.c:2426\n vprintk_default+0x3f/0x50 kernel/printk/printk.c:2465\n vprintk+0x36/0x50 kernel/printk/printk_safe.c:82\n _printk+0x17e/0x1b0 kernel/printk/printk.c:2475\n ib_nl_process_good_ip_rsep drivers/infiniband/core/addr.c:128 [inline]\n ib_nl_handle_ip_res_resp+0x963/0x9d0 drivers/infiniband/core/addr.c:141\n rdma_nl_rcv_msg drivers/infiniband/core/netlink.c:-1 [inline]\n rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline]\n rdma_nl_rcv+0xefa/0x11c0 drivers/infiniband/core/netlink.c:259\n netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]\n netlink_unicast+0xf04/0x12b0 net/netlink/af_netlink.c:1346\n netlink_sendmsg+0x10b3/0x1250 net/netlink/af_netlink.c:1896\n sock_sendmsg_nosec net/socket.c:714 [inline]\n __sock_sendmsg+0x333/0x3d0 net/socket.c:729\n ____sys_sendmsg+0x7e0/0xd80 net/socket.c:2617\n ___sys_sendmsg+0x271/0x3b0 net/socket.c:2671\n __sys_sendmsg+0x1aa/0x300 net/socket.c:2703\n __compat_sys_sendmsg net/compat.c:346 [inline]\n __do_compat_sys_sendmsg net/compat.c:353 [inline]\n __se_compat_sys_sendmsg net/compat.c:350 [inline]\n __ia32_compat_sys_sendmsg+0xa4/0x100 net/compat.c:350\n ia32_sys_call+0x3f6c/0x4310 arch/x86/include/generated/asm/syscalls_32.h:371\n do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]\n __do_fast_syscall_32+0xb0/0x150 arch/x86/entry/syscall_32.c:306\n do_fast_syscall_32+0x38/0x80 arch/x86/entry/syscall_32.c:331\n do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:3"
}
],
"lastModified": "2026-06-17T10:03:39.303",
"configurations": [
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