CVE-2022-49776
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
macvlan: enforce a consistent minimal mtu
macvlan should enforce a minimal mtu of 68, even at link creation.
This patch avoids the current behavior (which could lead to crashes in ipv6 stack if the link is brought up)
$ ip link add macvlan1 link eno1 mtu 8 type macvlan # This should fail ! $ ip link sh dev macvlan1 5: macvlan1@eno1: <BROADCAST,MULTICAST> mtu 8 qdisc noop state DOWN mode DEFAULT group default qlen 1000 link/ether 02:47:6c:24:74:82 brd ff:ff:ff:ff:ff:ff $ ip link set macvlan1 mtu 67 Error: mtu less than device minimum. $ ip link set macvlan1 mtu 68 $ ip link set macvlan1 mtu 8 Error: mtu less than device minimum.
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: 0.22%
- Percentil entre todas las CVEs puntuadas: 11
- 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
- NVD-CWE-noinfo
Referencias
- https://git.kernel.org/stable/c/2b055c719d8f94c15ec9b7659978133030c6a353
- https://git.kernel.org/stable/c/650137a7c0b2892df2e5b0bc112d7b09a78c93c8
- https://git.kernel.org/stable/c/a62aa84fe19eb24d083d600a074c009a0a66d4f3
- https://git.kernel.org/stable/c/b64085b00044bdf3cd1c9825e9ef5b2e0feae91a
- https://git.kernel.org/stable/c/d2fee7d121d189c6dc905b727d60e7043a6655bb
- https://git.kernel.org/stable/c/e41cbf98df22d08402e65174d147cbb187fe1a33
- https://git.kernel.org/stable/c/e929ec98c0c3b10d9c07f3776df0c1a02d7a763e
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmacvlan: enforce a consistent minimal mtu\n\nmacvlan should enforce a minimal mtu of 68, even at link creation.\n\nThis patch avoids the current behavior (which could lead to crashes\nin ipv6 stack if the link is brought up)\n\n$ ip link add macvlan1 link eno1 mtu 8 type macvlan # This should fail !\n$ ip link sh dev macvlan1\n5: macvlan1@eno1: <BROADCAST,MULTICAST> mtu 8 qdisc noop\n state DOWN mode DEFAULT group default qlen 1000\n link/ether 02:47:6c:24:74:82 brd ff:ff:ff:ff:ff:ff\n$ ip link set macvlan1 mtu 67\nError: mtu less than device minimum.\n$ ip link set macvlan1 mtu 68\n$ ip link set macvlan1 mtu 8\nError: mtu less than device minimum."
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: macvlan: exige una MTU mínima consistente. macvlan debería exigir una MTU mínima de 68, incluso al crear el enlace. Este parche evita el comportamiento actual (que podría provocar fallos en la pila IPv6 si se activa el enlace). $ ip link add macvlan1 link eno1 mtu 8 type macvlan # ¡Esto debería fallar! $ ip link sh dev macvlan1 5: macvlan1@eno1: mtu 8 qdisc noop state DOWN mode DEFAULT group default qlen 1000 link/ether 02:47:6c:24:74:82 brd ff:ff:ff:ff:ff:ff $ ip link set macvlan1 mtu 67 Error: MTU menor que el mínimo del dispositivo. $ ip link set macvlan1 mtu 68 $ ip link set macvlan1 mtu 8 Error: mtu menor que el mínimo del dispositivo."
}
],
"lastModified": "2026-06-17T05:19:07.153",
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