CVE-2025-38184
Estado: ModificadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
tipc: fix null-ptr-deref when acquiring remote ip of ethernet bearer
The reproduction steps: 1. create a tun interface 2. enable l2 bearer 3. TIPC_NL_UDP_GET_REMOTEIP with media name set to tun
the ub was in fact a struct dev.
when bid != 0 && skip_cnt != 0, bearer_list[bid] may be NULL or other media when other thread changes it.
fix this by checking media_id.
Detalles técnicos trazas, registros y código del informe original
tipc: Started in network mode tipc: Node identity 8af312d38a21, cluster identity 4711 tipc: Enabled bearer <eth:syz_tun>, priority 1 Oops: general protection fault KASAN: null-ptr-deref in range CPU: 1 UID: 1000 PID: 559 Comm: poc Not tainted 6.16.0-rc1+ #117 PREEMPT Hardware name: QEMU Ubuntu 24.04 PC RIP: 0010:tipc_udp_nl_dump_remoteip+0x4a4/0x8f0
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: 0.21%
- Percentil entre todas las CVEs puntuadas: 10
- Fecha de la puntuación: 6/10/2026
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-476
Referencias
- https://git.kernel.org/stable/c/05d332ba075753d569d66333d62d60fff5f57ad8
- https://git.kernel.org/stable/c/0d3d91c3500f0c480e016faa4e2259c588616e59
- https://git.kernel.org/stable/c/0f4a72fb266e48dbe928e1d936eab149e4ac3e1b
- https://git.kernel.org/stable/c/3998283e4c32c0fe69edd59b0876c193f50abce6
- https://git.kernel.org/stable/c/8595350615f952fcf8bc861464a6bf6b1129af50
- https://git.kernel.org/stable/c/c2e17984752b9131061d1a2ca1199da2706337fd
- https://git.kernel.org/stable/c/d3dfe821dfe091c0045044343c8d86596d66e2cf
- https://git.kernel.org/stable/c/f82727adcf2992822e12198792af450a76ebd5ef
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: fix null-ptr-deref when acquiring remote ip of ethernet bearer\n\nThe reproduction steps:\n1. create a tun interface\n2. enable l2 bearer\n3. TIPC_NL_UDP_GET_REMOTEIP with media name set to tun\n\ntipc: Started in network mode\ntipc: Node identity 8af312d38a21, cluster identity 4711\ntipc: Enabled bearer <eth:syz_tun>, priority 1\nOops: general protection fault\nKASAN: null-ptr-deref in range\nCPU: 1 UID: 1000 PID: 559 Comm: poc Not tainted 6.16.0-rc1+ #117 PREEMPT\nHardware name: QEMU Ubuntu 24.04 PC\nRIP: 0010:tipc_udp_nl_dump_remoteip+0x4a4/0x8f0\n\nthe ub was in fact a struct dev.\n\nwhen bid != 0 && skip_cnt != 0, bearer_list[bid] may be NULL or\nother media when other thread changes it.\n\nfix this by checking media_id."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tipc: corregir null-ptr-deref al adquirir la IP remota del portador Ethernet Pasos de reproducción: 1. crear una interfaz tun 2. habilitar el portador l2 3. TIPC_NL_UDP_GET_REMOTEIP con el nombre del medio establecido en tun tipc: iniciado en modo de red tipc: identidad del nodo 8af312d38a21, identidad del clúster 4711 tipc: portador habilitado , prioridad 1 Oops: error de protección general KASAN: null-ptr-deref en el rango CPU: 1 UID: 1000 PID: 559 Comm: poc No contaminado 6.16.0-rc1+ #117 PREEMPT Nombre del hardware: QEMU Ubuntu 24.04 PC RIP: 0010:tipc_udp_nl_dump_remoteip+0x4a4/0x8f0 el ub era de hecho un struct dev. cuando bid != 0 y skip_cnt != 0, bearer_list[bid] puede ser NULL u otro medio cuando otro hilo lo cambia. solucione esto comprobando media_id."
}
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