CVE-2024-56648
Estado: ModificadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
net: hsr: avoid potential out-of-bound access in fill_frame_info()
syzbot is able to feed a packet with 14 bytes, pretending it is a vlan one.
Since fill_frame_info() is relying on skb->mac_len already, extend the check to cover this case.
Detalles técnicos trazas, registros y código del informe original
BUG: KMSAN: uninit-value in fill_frame_info net/hsr/hsr_forward.c:709 [inline] BUG: KMSAN: uninit-value in hsr_forward_skb+0x9ee/0x3b10 net/hsr/hsr_forward.c:724 fill_frame_info net/hsr/hsr_forward.c:709 [inline] hsr_forward_skb+0x9ee/0x3b10 net/hsr/hsr_forward.c:724 hsr_dev_xmit+0x2f0/0x350 net/hsr/hsr_device.c:235 __netdev_start_xmit include/linux/netdevice.h:5002 [inline] netdev_start_xmit include/linux/netdevice.h:5011 [inline] xmit_one net/core/dev.c:3590 [inline] dev_hard_start_xmit+0x247/0xa20 net/core/dev.c:3606 __dev_queue_xmit+0x366a/0x57d0 net/core/dev.c:4434 dev_queue_xmit include/linux/netdevice.h:3168 [inline] packet_xmit+0x9c/0x6c0 net/packet/af_packet.c:276 packet_snd net/packet/af_packet.c:3146 [inline] packet_sendmsg+0x91ae/0xa6f0 net/packet/af_packet.c:3178 sock_sendmsg_nosec net/socket.c:711 [inline] __sock_sendmsg+0x30f/0x380 net/socket.c:726 __sys_sendto+0x594/0x750 net/socket.c:2197 __do_sys_sendto net/socket.c:2204 [inline] __se_sys_sendto net/socket.c:2200 [inline] __x64_sys_sendto+0x125/0x1d0 net/socket.c:2200 x64_sys_call+0x346a/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:45 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: slab_post_alloc_hook mm/slub.c:4091 [inline] slab_alloc_node mm/slub.c:4134 [inline] kmem_cache_alloc_node_noprof+0x6bf/0xb80 mm/slub.c:4186 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:587 __alloc_skb+0x363/0x7b0 net/core/skbuff.c:678 alloc_skb include/linux/skbuff.h:1323 [inline] alloc_skb_with_frags+0xc8/0xd00 net/core/skbuff.c:6612 sock_alloc_send_pskb+0xa81/0xbf0 net/core/sock.c:2881 packet_alloc_skb net/packet/af_packet.c:2995 [inline] packet_snd net/packet/af_packet.c:3089 [inline] packet_sendmsg+0x74c6/0xa6f0 net/packet/af_packet.c:3178 sock_sendmsg_nosec net/socket.c:711 [inline] __sock_sendmsg+0x30f/0x380 net/socket.c:726 __sys_sendto+0x594/0x750 net/socket.c:2197 __do_sys_sendto net/socket.c:2204 [inline] __se_sys_sendto net/socket.c:2200 [inline] __x64_sys_sendto+0x125/0x1d0 net/socket.c:2200 x64_sys_call+0x346a/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:45 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f
CVSS
- 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: 0.25%
- Percentil entre todas las CVEs puntuadas: 15
- Fecha de la puntuación: 5/10/2026
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
- CWE-908
Referencias
- https://git.kernel.org/stable/c/3c215663b3e27a3b08cefcaea623ff54c70c8035
- https://git.kernel.org/stable/c/6bb5c8ebc99f0671dbd3c9408ebaf935c3951186
- https://git.kernel.org/stable/c/7ea527fbd7b94d0bee64a0a7e98279bcc654b322
- https://git.kernel.org/stable/c/aa632691c722a123e47ccd05a3afdd5f87a36061
- https://git.kernel.org/stable/c/b9653d19e556c6afd035602927a93d100a0d7644
- https://git.kernel.org/stable/c/c6e778901d0055356c4fb223058364cae731494a
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
JSON original (NVD)
Mostrar
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"descriptions": [
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"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hsr: avoid potential out-of-bound access in fill_frame_info()\n\nsyzbot is able to feed a packet with 14 bytes, pretending\nit is a vlan one.\n\nSince fill_frame_info() is relying on skb->mac_len already,\nextend the check to cover this case.\n\nBUG: KMSAN: uninit-value in fill_frame_info net/hsr/hsr_forward.c:709 [inline]\n BUG: KMSAN: uninit-value in hsr_forward_skb+0x9ee/0x3b10 net/hsr/hsr_forward.c:724\n fill_frame_info net/hsr/hsr_forward.c:709 [inline]\n hsr_forward_skb+0x9ee/0x3b10 net/hsr/hsr_forward.c:724\n hsr_dev_xmit+0x2f0/0x350 net/hsr/hsr_device.c:235\n __netdev_start_xmit include/linux/netdevice.h:5002 [inline]\n netdev_start_xmit include/linux/netdevice.h:5011 [inline]\n xmit_one net/core/dev.c:3590 [inline]\n dev_hard_start_xmit+0x247/0xa20 net/core/dev.c:3606\n __dev_queue_xmit+0x366a/0x57d0 net/core/dev.c:4434\n dev_queue_xmit include/linux/netdevice.h:3168 [inline]\n packet_xmit+0x9c/0x6c0 net/packet/af_packet.c:276\n packet_snd net/packet/af_packet.c:3146 [inline]\n packet_sendmsg+0x91ae/0xa6f0 net/packet/af_packet.c:3178\n sock_sendmsg_nosec net/socket.c:711 [inline]\n __sock_sendmsg+0x30f/0x380 net/socket.c:726\n __sys_sendto+0x594/0x750 net/socket.c:2197\n __do_sys_sendto net/socket.c:2204 [inline]\n __se_sys_sendto net/socket.c:2200 [inline]\n __x64_sys_sendto+0x125/0x1d0 net/socket.c:2200\n x64_sys_call+0x346a/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:45\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nUninit was created at:\n slab_post_alloc_hook mm/slub.c:4091 [inline]\n slab_alloc_node mm/slub.c:4134 [inline]\n kmem_cache_alloc_node_noprof+0x6bf/0xb80 mm/slub.c:4186\n kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:587\n __alloc_skb+0x363/0x7b0 net/core/skbuff.c:678\n alloc_skb include/linux/skbuff.h:1323 [inline]\n alloc_skb_with_frags+0xc8/0xd00 net/core/skbuff.c:6612\n sock_alloc_send_pskb+0xa81/0xbf0 net/core/sock.c:2881\n packet_alloc_skb net/packet/af_packet.c:2995 [inline]\n packet_snd net/packet/af_packet.c:3089 [inline]\n packet_sendmsg+0x74c6/0xa6f0 net/packet/af_packet.c:3178\n sock_sendmsg_nosec net/socket.c:711 [inline]\n __sock_sendmsg+0x30f/0x380 net/socket.c:726\n __sys_sendto+0x594/0x750 net/socket.c:2197\n __do_sys_sendto net/socket.c:2204 [inline]\n __se_sys_sendto net/socket.c:2200 [inline]\n __x64_sys_sendto+0x125/0x1d0 net/socket.c:2200\n x64_sys_call+0x346a/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:45\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f"
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: hsr: evitar un posible acceso fuera de los límites en fill_frame_info() syzbot puede enviar un paquete con 14 bytes, simulando que es uno de VLAN. Dado que fill_frame_info() ya depende de skb->mac_len, amplíe la comprobación para cubrir este caso. ERROR: KMSAN: valor no inicializado en fill_frame_info net/hsr/hsr_forward.c:709 [en línea] ERROR: KMSAN: valor no inicializado en hsr_forward_skb+0x9ee/0x3b10 net/hsr/hsr_forward.c:724 fill_frame_info net/hsr/hsr_forward.c:709 [en línea] hsr_forward_skb+0x9ee/0x3b10 net/hsr/hsr_forward.c:724 hsr_dev_xmit+0x2f0/0x350 net/hsr/hsr_device.c:235 __netdev_start_xmit include/linux/netdevice.h:5002 [en línea] netdev_start_xmit incluir/linux/netdevice.h:5011 [en línea] xmit_one net/core/dev.c:3590 [en línea] dev_hard_start_xmit+0x247/0xa20 net/core/dev.c:3606 __dev_queue_xmit+0x366a/0x57d0 net/core/dev.c:4434 dev_queue_xmit incluir/linux/netdevice.h:3168 [en línea] paquete_xmit+0x9c/0x6c0 net/paquete/af_packet.c:276 paquete_snd net/paquete/af_packet.c:3146 [en línea] paquete_sendmsg+0x91ae/0xa6f0 net/paquete/af_packet.c:3178 sock_sendmsg_nosec net/socket.c:711 [en línea] __sock_sendmsg+0x30f/0x380 red/socket.c:726 __sys_sendto+0x594/0x750 red/socket.c:2197 __do_sys_sendto red/socket.c:2204 [en línea] __se_sys_sendto red/socket.c:2200 [en línea] __x64_sys_sendto+0x125/0x1d0 red/socket.c:2200 x64_sys_call+0x346a/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:45 do_syscall_x64 arch/x86/entry/common.c:52 [en línea] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit se creó en: slab_post_alloc_hook mm/slub.c:4091 [en línea] slab_alloc_node mm/slub.c:4134 [en línea] kmem_cache_alloc_node_noprof+0x6bf/0xb80 mm/slub.c:4186 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:587 __alloc_skb+0x363/0x7b0 net/core/skbuff.c:678 alloc_skb include/linux/skbuff.h:1323 [en línea] alloc_skb_with_frags+0xc8/0xd00 red/core/skbuff.c:6612 sock_alloc_send_pskb+0xa81/0xbf0 red/core/sock.c:2881 paquete_alloc_skb red/paquete/af_packet.c:2995 [en línea] paquete_snd red/paquete/af_packet.c:3089 [en línea] paquete_sendmsg+0x74c6/0xa6f0 red/paquete/af_packet.c:3178 sock_sendmsg_nosec red/socket.c:711 [en línea] __sock_sendmsg+0x30f/0x380 red/socket.c:726 __sys_sendto+0x594/0x750 red/socket.c:2197 __do_sys_sendto net/socket.c:2204 [en línea] __se_sys_sendto net/socket.c:2200 [en línea] __x64_sys_sendto+0x125/0x1d0 net/socket.c:2200 x64_sys_call+0x346a/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:45 do_syscall_x64 arch/x86/entry/common.c:52 [en línea] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f"
}
],
"lastModified": "2026-06-17T08:12:38.447",
"configurations": [
{
"nodes": [
{
"negate": false,
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"operator": "OR"
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}