CVE-2024-26857
Estado: ModificadaAlta (7.3)—
Detalles técnicos trazas, registros y código del informe original
En el kernel de Linux, se resolvió la siguiente vulnerabilidad: geneve: asegúrese de extraer el encabezado interno en geneve_rx() syzbot desencadenó un error en geneve_rx() [1] El problema es similar al que solucioné en la confirmación 8d975c15c0cd ("ip6_tunnel: asegúrese de extraer el encabezado interno en __ip6_tnl_rcv()"). Tenemos que guardar skb->network_header en una variable temporal para poder volver a calcular el puntero network_header después de una llamada a pskb_inet_may_pull(). pskb_inet_may_pull() se asegura de que los encabezados necesarios estén en skb->head. [1] ERROR: KMSAN: valor uninit en IP_ECN_decapsulate include/net/inet_ecn.h:302 [en línea] ERROR: KMSAN: valor uninit en geneve_rx drivers/net/geneve.c:279 [en línea] ERROR: KMSAN: uninit -valor en geneve_udp_encap_recv+0x36f9/0x3c10 drivers/net/geneve.c:391 IP_ECN_decapsulate include/net/inet_ecn.h:302 [en línea] geneve_rx drivers/net/geneve.c:279 [en línea] geneve_udp_encap_recv+0x36f9/0x3c10 drivers/ net/geneve.c:391 udp_queue_rcv_one_skb+0x1d39/0x1f20 net/ipv4/udp.c:2108 udp_queue_rcv_skb+0x6ae/0x6e0 net/ipv4/udp.c:2186 udp_unicast_rcv_skb+0x184/0x4b0 net/ipv4/udp. c:2346 __udp4_lib_rcv +0x1c6b/0x3010 net/ipv4/udp.c:2422 udp_rcv+0x7d/0xa0 net/ipv4/udp.c:2604 ip_protocol_deliver_rcu+0x264/0x1300 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x2b8/0x440 net/ ipv4/ ip_input.c:233 NF_HOOK include/linux/netfilter.h:314 [en línea] ip_local_deliver+0x21f/0x490 net/ipv4/ip_input.c:254 dst_input include/net/dst.h:461 [en línea] ip_rcv_finish net/ipv4/ ip_input.c:449 [en línea] NF_HOOK include/linux/netfilter.h:314 [en línea] ip_rcv+0x46f/0x760 net/ipv4/ip_input.c:569 __netif_receive_skb_one_core net/core/dev.c:5534 [en línea] __netif_receive_skb+ 0x1a6/0x5a0 net/core/dev.c:5648 Process_backlog+0x480/0x8b0 net/core/dev.c:5976 __napi_poll+0xe3/0x980 net/core/dev.c:6576 napi_poll net/core/dev.c:6645 [en línea] net_rx_action+0x8b8/0x1870 net/core/dev.c:6778 __do_softirq+0x1b7/0x7c5 kernel/softirq.c:553 do_softirq+0x9a/0xf0 kernel/softirq.c:454 __local_bh_enable_ip+0x9b/0xa0 kernel/softirq. c:381 local_bh_enable include/linux/bottom_half.h:33 [en línea] rcu_read_unlock_bh include/linux/rcupdate.h:820 [en línea] __dev_queue_xmit+0x2768/0x51c0 net/core/dev.c:4378 dev_queue_xmit include/linux/netdevice. h:3171 [en línea] paquete_xmit+0x9c/0x6b0 net/packet/af_packet.c:276 paquete_snd net/packet/af_packet.c:3081 [en línea] paquete_sendmsg+0x8aef/0x9f10 net/packet/af_packet.c:3113 sock_sendmsg_nosec net/ socket.c:730 [en línea] __sock_sendmsg net/socket.c:745 [en línea] __sys_sendto+0x735/0xa10 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [en línea] __se_sys_sendto net/socket.c:2199 [en línea] __x64_sys_sendto+0x125/0x1c0 net/socket.c:2199 do_syscall_x64 arch/x86/entry/common.c:52 [en línea] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 Entry_SYSCALL_64_after_hwframe+0x63 / 0x6b Uninit se creó en: slab_post_alloc_hook mm/slub.c:3819 [en línea] slab_alloc_node mm/slub.c:3860 [en línea] kmem_cache_alloc_node+0x5cb/0xbc0 mm/slub.c:3903 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff .c:560 __alloc_skb+0x352/0x790 net/core/skbuff.c:651 alloc_skb include/linux/skbuff.h:1296 [en línea] alloc_skb_with_frags+0xc8/0xbd0 net/core/skbuff.c:6394 sock_alloc_send_pskb+0xa80/0xbf0 net/core/sock.c:2783 paquete_alloc_skb net/packet/af_packet.c:2930 [en línea] paquete_snd net/packet/af_packet.c:3024 [en línea] paquete_sendmsg+0x70c2/0x9f10 net/packet/af_packet.c:3113 sock_sendmsg_nosec net/socket.c:730 [en línea] __sock_sendmsg net/socket.c:745 [en línea] __sys_sendto+0x735/0xa10 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [en línea] __se_sys_sendto net/socket.c :2199 [en línea] __x64_sys_sendto+0x125/0x1c0 net/socket.c:2199 do_syscall_x64 arch/x86/entry/common.c:52 [en línea] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 Entry_SYSCALL_64_after_hwframe + 0x63/0x6bCVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
- Puntuación base: 7.3
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.61%
- Percentil entre todas las CVEs puntuadas: 47
- Fecha de la puntuación: 8/10/2026
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 (2)
CWE
- CWE-908
Referencias
- https://git.kernel.org/stable/c/048e16dee1fc609c1c85072ccd70bfd4b5fef6ca
- https://git.kernel.org/stable/c/0ece581d2a66e8e488c0d3b3e7b5760dbbfdbdd5
- https://git.kernel.org/stable/c/1ca1ba465e55b9460e4e75dec9fff31e708fec74
- https://git.kernel.org/stable/c/59d2a4076983303f324557a114cfd5c32e1f6b29
- https://git.kernel.org/stable/c/c0b22568a9d8384fd000cc49acb8f74bde40d1b5
- https://git.kernel.org/stable/c/c7137900691f5692fe3de54566ea7b30bb35d66c
- https://git.kernel.org/stable/c/e431c3227864b5646601c97f5f898d99472f2914
- https://git.kernel.org/stable/c/e77e0b0f2a11735c64b105edaee54d6344faca8a
- https://git.kernel.org/stable/c/048e16dee1fc609c1c85072ccd70bfd4b5fef6ca
- https://git.kernel.org/stable/c/0ece581d2a66e8e488c0d3b3e7b5760dbbfdbdd5
- https://git.kernel.org/stable/c/1ca1ba465e55b9460e4e75dec9fff31e708fec74
- https://git.kernel.org/stable/c/59d2a4076983303f324557a114cfd5c32e1f6b29
- https://git.kernel.org/stable/c/c0b22568a9d8384fd000cc49acb8f74bde40d1b5
- https://git.kernel.org/stable/c/c7137900691f5692fe3de54566ea7b30bb35d66c
- https://git.kernel.org/stable/c/e431c3227864b5646601c97f5f898d99472f2914
- https://git.kernel.org/stable/c/e77e0b0f2a11735c64b105edaee54d6344faca8a
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
JSON original (NVD)
Mostrar
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"vulnStatus": "Modified",
"weaknesses": [
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"source": "nvd@nist.gov",
"description": [
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"lang": "en",
"value": "CWE-908"
}
]
}
],
"descriptions": [
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngeneve: make sure to pull inner header in geneve_rx()\n\nsyzbot triggered a bug in geneve_rx() [1]\n\nIssue is similar to the one I fixed in commit 8d975c15c0cd\n(\"ip6_tunnel: make sure to pull inner header in __ip6_tnl_rcv()\")\n\nWe have to save skb->network_header in a temporary variable\nin order to be able to recompute the network_header pointer\nafter a pskb_inet_may_pull() call.\n\npskb_inet_may_pull() makes sure the needed headers are in skb->head.\n\n[1]\nBUG: KMSAN: uninit-value in IP_ECN_decapsulate include/net/inet_ecn.h:302 [inline]\n BUG: KMSAN: uninit-value in geneve_rx drivers/net/geneve.c:279 [inline]\n BUG: KMSAN: uninit-value in geneve_udp_encap_recv+0x36f9/0x3c10 drivers/net/geneve.c:391\n IP_ECN_decapsulate include/net/inet_ecn.h:302 [inline]\n geneve_rx drivers/net/geneve.c:279 [inline]\n geneve_udp_encap_recv+0x36f9/0x3c10 drivers/net/geneve.c:391\n udp_queue_rcv_one_skb+0x1d39/0x1f20 net/ipv4/udp.c:2108\n udp_queue_rcv_skb+0x6ae/0x6e0 net/ipv4/udp.c:2186\n udp_unicast_rcv_skb+0x184/0x4b0 net/ipv4/udp.c:2346\n __udp4_lib_rcv+0x1c6b/0x3010 net/ipv4/udp.c:2422\n udp_rcv+0x7d/0xa0 net/ipv4/udp.c:2604\n ip_protocol_deliver_rcu+0x264/0x1300 net/ipv4/ip_input.c:205\n ip_local_deliver_finish+0x2b8/0x440 net/ipv4/ip_input.c:233\n NF_HOOK include/linux/netfilter.h:314 [inline]\n ip_local_deliver+0x21f/0x490 net/ipv4/ip_input.c:254\n dst_input include/net/dst.h:461 [inline]\n ip_rcv_finish net/ipv4/ip_input.c:449 [inline]\n NF_HOOK include/linux/netfilter.h:314 [inline]\n ip_rcv+0x46f/0x760 net/ipv4/ip_input.c:569\n __netif_receive_skb_one_core net/core/dev.c:5534 [inline]\n __netif_receive_skb+0x1a6/0x5a0 net/core/dev.c:5648\n process_backlog+0x480/0x8b0 net/core/dev.c:5976\n __napi_poll+0xe3/0x980 net/core/dev.c:6576\n napi_poll net/core/dev.c:6645 [inline]\n net_rx_action+0x8b8/0x1870 net/core/dev.c:6778\n __do_softirq+0x1b7/0x7c5 kernel/softirq.c:553\n do_softirq+0x9a/0xf0 kernel/softirq.c:454\n __local_bh_enable_ip+0x9b/0xa0 kernel/softirq.c:381\n local_bh_enable include/linux/bottom_half.h:33 [inline]\n rcu_read_unlock_bh include/linux/rcupdate.h:820 [inline]\n __dev_queue_xmit+0x2768/0x51c0 net/core/dev.c:4378\n dev_queue_xmit include/linux/netdevice.h:3171 [inline]\n packet_xmit+0x9c/0x6b0 net/packet/af_packet.c:276\n packet_snd net/packet/af_packet.c:3081 [inline]\n packet_sendmsg+0x8aef/0x9f10 net/packet/af_packet.c:3113\n sock_sendmsg_nosec net/socket.c:730 [inline]\n __sock_sendmsg net/socket.c:745 [inline]\n __sys_sendto+0x735/0xa10 net/socket.c:2191\n __do_sys_sendto net/socket.c:2203 [inline]\n __se_sys_sendto net/socket.c:2199 [inline]\n __x64_sys_sendto+0x125/0x1c0 net/socket.c:2199\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x63/0x6b\n\nUninit was created at:\n slab_post_alloc_hook mm/slub.c:3819 [inline]\n slab_alloc_node mm/slub.c:3860 [inline]\n kmem_cache_alloc_node+0x5cb/0xbc0 mm/slub.c:3903\n kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:560\n __alloc_skb+0x352/0x790 net/core/skbuff.c:651\n alloc_skb include/linux/skbuff.h:1296 [inline]\n alloc_skb_with_frags+0xc8/0xbd0 net/core/skbuff.c:6394\n sock_alloc_send_pskb+0xa80/0xbf0 net/core/sock.c:2783\n packet_alloc_skb net/packet/af_packet.c:2930 [inline]\n packet_snd net/packet/af_packet.c:3024 [inline]\n packet_sendmsg+0x70c2/0x9f10 net/packet/af_packet.c:3113\n sock_sendmsg_nosec net/socket.c:730 [inline]\n __sock_sendmsg net/socket.c:745 [inline]\n __sys_sendto+0x735/0xa10 net/socket.c:2191\n __do_sys_sendto net/socket.c:2203 [inline]\n __se_sys_sendto net/socket.c:2199 [inline]\n __x64_sys_sendto+0x125/0x1c0 net/socket.c:2199\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x63/0x6b"
},
{
"lang": "es",
"value": "En el kernel de Linux, se resolvió la siguiente vulnerabilidad: geneve: asegúrese de extraer el encabezado interno en geneve_rx() syzbot desencadenó un error en geneve_rx() [1] El problema es similar al que solucioné en la confirmación 8d975c15c0cd (\"ip6_tunnel: asegúrese de extraer el encabezado interno en __ip6_tnl_rcv()\"). Tenemos que guardar skb->network_header en una variable temporal para poder volver a calcular el puntero network_header después de una llamada a pskb_inet_may_pull(). pskb_inet_may_pull() se asegura de que los encabezados necesarios estén en skb->head. [1] ERROR: KMSAN: valor uninit en IP_ECN_decapsulate include/net/inet_ecn.h:302 [en línea] ERROR: KMSAN: valor uninit en geneve_rx drivers/net/geneve.c:279 [en línea] ERROR: KMSAN: uninit -valor en geneve_udp_encap_recv+0x36f9/0x3c10 drivers/net/geneve.c:391 IP_ECN_decapsulate include/net/inet_ecn.h:302 [en línea] geneve_rx drivers/net/geneve.c:279 [en línea] geneve_udp_encap_recv+0x36f9/0x3c10 drivers/ net/geneve.c:391 udp_queue_rcv_one_skb+0x1d39/0x1f20 net/ipv4/udp.c:2108 udp_queue_rcv_skb+0x6ae/0x6e0 net/ipv4/udp.c:2186 udp_unicast_rcv_skb+0x184/0x4b0 net/ipv4/udp. c:2346 __udp4_lib_rcv +0x1c6b/0x3010 net/ipv4/udp.c:2422 udp_rcv+0x7d/0xa0 net/ipv4/udp.c:2604 ip_protocol_deliver_rcu+0x264/0x1300 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x2b8/0x440 net/ ipv4/ ip_input.c:233 NF_HOOK include/linux/netfilter.h:314 [en línea] ip_local_deliver+0x21f/0x490 net/ipv4/ip_input.c:254 dst_input include/net/dst.h:461 [en línea] ip_rcv_finish net/ipv4/ ip_input.c:449 [en línea] NF_HOOK include/linux/netfilter.h:314 [en línea] ip_rcv+0x46f/0x760 net/ipv4/ip_input.c:569 __netif_receive_skb_one_core net/core/dev.c:5534 [en línea] __netif_receive_skb+ 0x1a6/0x5a0 net/core/dev.c:5648 Process_backlog+0x480/0x8b0 net/core/dev.c:5976 __napi_poll+0xe3/0x980 net/core/dev.c:6576 napi_poll net/core/dev.c:6645 [en línea] net_rx_action+0x8b8/0x1870 net/core/dev.c:6778 __do_softirq+0x1b7/0x7c5 kernel/softirq.c:553 do_softirq+0x9a/0xf0 kernel/softirq.c:454 __local_bh_enable_ip+0x9b/0xa0 kernel/softirq. c:381 local_bh_enable include/linux/bottom_half.h:33 [en línea] rcu_read_unlock_bh include/linux/rcupdate.h:820 [en línea] __dev_queue_xmit+0x2768/0x51c0 net/core/dev.c:4378 dev_queue_xmit include/linux/netdevice. h:3171 [en línea] paquete_xmit+0x9c/0x6b0 net/packet/af_packet.c:276 paquete_snd net/packet/af_packet.c:3081 [en línea] paquete_sendmsg+0x8aef/0x9f10 net/packet/af_packet.c:3113 sock_sendmsg_nosec net/ socket.c:730 [en línea] __sock_sendmsg net/socket.c:745 [en línea] __sys_sendto+0x735/0xa10 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [en línea] __se_sys_sendto net/socket.c:2199 [en línea] __x64_sys_sendto+0x125/0x1c0 net/socket.c:2199 do_syscall_x64 arch/x86/entry/common.c:52 [en línea] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 Entry_SYSCALL_64_after_hwframe+0x63 / 0x6b Uninit se creó en: slab_post_alloc_hook mm/slub.c:3819 [en línea] slab_alloc_node mm/slub.c:3860 [en línea] kmem_cache_alloc_node+0x5cb/0xbc0 mm/slub.c:3903 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff .c:560 __alloc_skb+0x352/0x790 net/core/skbuff.c:651 alloc_skb include/linux/skbuff.h:1296 [en línea] alloc_skb_with_frags+0xc8/0xbd0 net/core/skbuff.c:6394 sock_alloc_send_pskb+0xa80/0xbf0 net/core/sock.c:2783 paquete_alloc_skb net/packet/af_packet.c:2930 [en línea] paquete_snd net/packet/af_packet.c:3024 [en línea] paquete_sendmsg+0x70c2/0x9f10 net/packet/af_packet.c:3113 sock_sendmsg_nosec net/socket.c:730 [en línea] __sock_sendmsg net/socket.c:745 [en línea] __sys_sendto+0x735/0xa10 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [en línea] __se_sys_sendto net/socket.c :2199 [en línea] __x64_sys_sendto+0x125/0x1c0 net/socket.c:2199 do_syscall_x64 arch/x86/entry/common.c:52 [en línea] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 Entry_SYSCALL_64_after_hwframe + 0x63/0x6b"
}
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"lastModified": "2026-08-04T11:17:14.063",
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