CVE-2025-38441
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
netfilter: flowtable: account for Ethernet header in nf_flow_pppoe_proto()
syzbot found a potential access to uninit-value in nf_flow_pppoe_proto()
Blamed commit forgot the Ethernet header.
Detalles técnicos trazas, registros y código del informe original
BUG: KMSAN: uninit-value in nf_flow_offload_inet_hook+0x7e4/0x940 net/netfilter/nf_flow_table_inet.c:27 nf_flow_offload_inet_hook+0x7e4/0x940 net/netfilter/nf_flow_table_inet.c:27 nf_hook_entry_hookfn include/linux/netfilter.h:157 [inline] nf_hook_slow+0xe1/0x3d0 net/netfilter/core.c:623 nf_hook_ingress include/linux/netfilter_netdev.h:34 [inline] nf_ingress net/core/dev.c:5742 [inline] __netif_receive_skb_core+0x4aff/0x70c0 net/core/dev.c:5837 __netif_receive_skb_one_core net/core/dev.c:5975 [inline] __netif_receive_skb+0xcc/0xac0 net/core/dev.c:6090 netif_receive_skb_internal net/core/dev.c:6176 [inline] netif_receive_skb+0x57/0x630 net/core/dev.c:6235 tun_rx_batched+0x1df/0x980 drivers/net/tun.c:1485 tun_get_user+0x4ee0/0x6b40 drivers/net/tun.c:1938 tun_chr_write_iter+0x3e9/0x5c0 drivers/net/tun.c:1984 new_sync_write fs/read_write.c:593 [inline] vfs_write+0xb4b/0x1580 fs/read_write.c:686 ksys_write fs/read_write.c:738 [inline] __do_sys_write fs/read_write.c:749 [inline]
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: 0.17%
- Percentil entre todas las CVEs puntuadas: 5
- 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 (2)
CWE
- CWE-908
Referencias
- https://git.kernel.org/stable/c/18cdb3d982da8976b28d57691eb256ec5688fad2
- https://git.kernel.org/stable/c/9fbc49429a23b02595ba82536c5ea425fdabb221
- https://git.kernel.org/stable/c/a3aea97d55964e70a1e6426aa4cafdc036e8a2dd
- https://git.kernel.org/stable/c/cfbf0665969af2c69d10c377d4c3d306e717efb4
- https://git.kernel.org/stable/c/e0dd2e9729660f3f4fcb16e0aef87342911528ef
- https://git.kernel.org/stable/c/eed8960b289327235185b7c32649c3470a3e969b
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
JSON original (NVD)
Mostrar
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"attackComplexity": "LOW",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: flowtable: account for Ethernet header in nf_flow_pppoe_proto()\n\nsyzbot found a potential access to uninit-value in nf_flow_pppoe_proto()\n\nBlamed commit forgot the Ethernet header.\n\nBUG: KMSAN: uninit-value in nf_flow_offload_inet_hook+0x7e4/0x940 net/netfilter/nf_flow_table_inet.c:27\n nf_flow_offload_inet_hook+0x7e4/0x940 net/netfilter/nf_flow_table_inet.c:27\n nf_hook_entry_hookfn include/linux/netfilter.h:157 [inline]\n nf_hook_slow+0xe1/0x3d0 net/netfilter/core.c:623\n nf_hook_ingress include/linux/netfilter_netdev.h:34 [inline]\n nf_ingress net/core/dev.c:5742 [inline]\n __netif_receive_skb_core+0x4aff/0x70c0 net/core/dev.c:5837\n __netif_receive_skb_one_core net/core/dev.c:5975 [inline]\n __netif_receive_skb+0xcc/0xac0 net/core/dev.c:6090\n netif_receive_skb_internal net/core/dev.c:6176 [inline]\n netif_receive_skb+0x57/0x630 net/core/dev.c:6235\n tun_rx_batched+0x1df/0x980 drivers/net/tun.c:1485\n tun_get_user+0x4ee0/0x6b40 drivers/net/tun.c:1938\n tun_chr_write_iter+0x3e9/0x5c0 drivers/net/tun.c:1984\n new_sync_write fs/read_write.c:593 [inline]\n vfs_write+0xb4b/0x1580 fs/read_write.c:686\n ksys_write fs/read_write.c:738 [inline]\n __do_sys_write fs/read_write.c:749 [inline]"
},
{
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: flowtable: cuenta para el encabezado Ethernet en nf_flow_pppoe_proto() syzbot encontró un acceso potencial a uninit-value en nf_flow_pppoe_proto() El commit culpado olvidó el encabezado Ethernet. BUG: KMSAN: uninit-value in nf_flow_offload_inet_hook+0x7e4/0x940 net/netfilter/nf_flow_table_inet.c:27 nf_flow_offload_inet_hook+0x7e4/0x940 net/netfilter/nf_flow_table_inet.c:27 nf_hook_entry_hookfn include/linux/netfilter.h:157 [inline] nf_hook_slow+0xe1/0x3d0 net/netfilter/core.c:623 nf_hook_ingress include/linux/netfilter_netdev.h:34 [inline] nf_ingress net/core/dev.c:5742 [inline] __netif_receive_skb_core+0x4aff/0x70c0 net/core/dev.c:5837 __netif_receive_skb_one_core net/core/dev.c:5975 [inline] __netif_receive_skb+0xcc/0xac0 net/core/dev.c:6090 netif_receive_skb_internal net/core/dev.c:6176 [inline] netif_receive_skb+0x57/0x630 net/core/dev.c:6235 tun_rx_batched+0x1df/0x980 drivers/net/tun.c:1485 tun_get_user+0x4ee0/0x6b40 drivers/net/tun.c:1938 tun_chr_write_iter+0x3e9/0x5c0 drivers/net/tun.c:1984 new_sync_write fs/read_write.c:593 [inline] vfs_write+0xb4b/0x1580 fs/read_write.c:686 ksys_write fs/read_write.c:738 [inline] __do_sys_write fs/read_write.c:749 [inline]\n"
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"lastModified": "2026-06-17T09:16:51.760",
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