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CVE-2024-47734

Estado: ModificadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

bonding: Fix unnecessary warnings and logs from bond_xdp_get_xmit_slave()

syzbot reported a WARNING in bond_xdp_get_xmit_slave. To reproduce this[1], one bond device (bond1) has xdpdrv, which increases bpf_master_redirect_enabled_key. Another bond device (bond0) which is unsupported by XDP but its slave (veth3) has xdpgeneric that returns XDP_TX. This triggers WARN_ON_ONCE() from the xdp_master_redirect(). To reduce unnecessary warnings and improve log management, we need to delete the WARN_ON_ONCE() and add ratelimit to the netdev_err().

Detalles técnicos trazas, registros y código del informe original
[1] Steps to reproduce:
    # Needs tx_xdp with return XDP_TX;
    ip l add veth0 type veth peer veth1
    ip l add veth3 type veth peer veth4
    ip l add bond0 type bond mode 6 # BOND_MODE_ALB, unsupported by XDP
    ip l add bond1 type bond # BOND_MODE_ROUNDROBIN by default
    ip l set veth0 master bond1
    ip l set bond1 up
    # Increases bpf_master_redirect_enabled_key
    ip l set dev bond1 xdpdrv object tx_xdp.o section xdp_tx
    ip l set veth3 master bond0
    ip l set bond0 up
    ip l set veth4 up
    # Triggers WARN_ON_ONCE() from the xdp_master_redirect()
    ip l set veth3 xdpgeneric object tx_xdp.o section xdp_tx

CVSS

Probabilidad de explotación (EPSS)

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)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

Mostrar
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          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbonding: Fix unnecessary warnings and logs from bond_xdp_get_xmit_slave()\n\nsyzbot reported a WARNING in bond_xdp_get_xmit_slave. To reproduce\nthis[1], one bond device (bond1) has xdpdrv, which increases\nbpf_master_redirect_enabled_key. Another bond device (bond0) which is\nunsupported by XDP but its slave (veth3) has xdpgeneric that returns\nXDP_TX. This triggers WARN_ON_ONCE() from the xdp_master_redirect().\nTo reduce unnecessary warnings and improve log management, we need to\ndelete the WARN_ON_ONCE() and add ratelimit to the netdev_err().\n\n[1] Steps to reproduce:\n    # Needs tx_xdp with return XDP_TX;\n    ip l add veth0 type veth peer veth1\n    ip l add veth3 type veth peer veth4\n    ip l add bond0 type bond mode 6 # BOND_MODE_ALB, unsupported by XDP\n    ip l add bond1 type bond # BOND_MODE_ROUNDROBIN by default\n    ip l set veth0 master bond1\n    ip l set bond1 up\n    # Increases bpf_master_redirect_enabled_key\n    ip l set dev bond1 xdpdrv object tx_xdp.o section xdp_tx\n    ip l set veth3 master bond0\n    ip l set bond0 up\n    ip l set veth4 up\n    # Triggers WARN_ON_ONCE() from the xdp_master_redirect()\n    ip l set veth3 xdpgeneric object tx_xdp.o section xdp_tx"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bonding: Corrija las advertencias y registros innecesarios de bond_xdp_get_xmit_slave() syzbot informó una ADVERTENCIA en bond_xdp_get_xmit_slave. Para reproducir esto[1], un dispositivo de enlace (bond1) tiene xdpdrv, que aumenta bpf_master_redirect_enabled_key. Otro dispositivo de enlace (bond0) que no es compatible con XDP pero su esclavo (veth3) tiene xdpgeneric que devuelve XDP_TX. Esto activa WARN_ON_ONCE() desde xdp_master_redirect(). Para reducir las advertencias innecesarias y mejorar la gestión de registros, debemos eliminar WARN_ON_ONCE() y agregar ratelimit a netdev_err(). [1] Pasos para reproducir: # Necesita tx_xdp con return XDP_TX; ip l add veth0 type veth peer veth1 ip l add veth3 type veth peer veth4 ip l add bond0 type bond mode 6 # BOND_MODE_ALB, no compatible con XDP ip l add bond1 type bond # BOND_MODE_ROUNDROBIN de forma predeterminada ip l set veth0 master bond1 ip l set bond1 up # Aumenta bpf_master_redirect_enabled_key ip l set dev bond1 xdpdrv object tx_xdp.o section xdp_tx ip l set veth3 master bond0 ip l set bond0 up ip l set veth4 up # Activa WARN_ON_ONCE() desde xdp_master_redirect() ip l set veth3 xdpgeneric object tx_xdp.o section xdp_tx"
    }
  ],
  "lastModified": "2026-06-17T07:57:39.017",
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