CVE-2022-49776

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2022-49776
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.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/2b055c719d8f94c15ec9b7659978133030c6a353 Patch
https://git.kernel.org/stable/c/650137a7c0b2892df2e5b0bc112d7b09a78c93c8 Patch
https://git.kernel.org/stable/c/a62aa84fe19eb24d083d600a074c009a0a66d4f3 Patch
https://git.kernel.org/stable/c/b64085b00044bdf3cd1c9825e9ef5b2e0feae91a Patch
https://git.kernel.org/stable/c/d2fee7d121d189c6dc905b727d60e7043a6655bb Patch
https://git.kernel.org/stable/c/e41cbf98df22d08402e65174d147cbb187fe1a33 Patch
https://git.kernel.org/stable/c/e929ec98c0c3b10d9c07f3776df0c1a02d7a763e Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

07 Nov 2025, 18:40

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
First Time Linux
Linux linux Kernel
References () https://git.kernel.org/stable/c/2b055c719d8f94c15ec9b7659978133030c6a353 - () https://git.kernel.org/stable/c/2b055c719d8f94c15ec9b7659978133030c6a353 - Patch
References () https://git.kernel.org/stable/c/650137a7c0b2892df2e5b0bc112d7b09a78c93c8 - () https://git.kernel.org/stable/c/650137a7c0b2892df2e5b0bc112d7b09a78c93c8 - Patch
References () https://git.kernel.org/stable/c/a62aa84fe19eb24d083d600a074c009a0a66d4f3 - () https://git.kernel.org/stable/c/a62aa84fe19eb24d083d600a074c009a0a66d4f3 - Patch
References () https://git.kernel.org/stable/c/b64085b00044bdf3cd1c9825e9ef5b2e0feae91a - () https://git.kernel.org/stable/c/b64085b00044bdf3cd1c9825e9ef5b2e0feae91a - Patch
References () https://git.kernel.org/stable/c/d2fee7d121d189c6dc905b727d60e7043a6655bb - () https://git.kernel.org/stable/c/d2fee7d121d189c6dc905b727d60e7043a6655bb - Patch
References () https://git.kernel.org/stable/c/e41cbf98df22d08402e65174d147cbb187fe1a33 - () https://git.kernel.org/stable/c/e41cbf98df22d08402e65174d147cbb187fe1a33 - Patch
References () https://git.kernel.org/stable/c/e929ec98c0c3b10d9c07f3776df0c1a02d7a763e - () https://git.kernel.org/stable/c/e929ec98c0c3b10d9c07f3776df0c1a02d7a763e - Patch
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
CWE NVD-CWE-noinfo
Summary
  • (es) 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.

01 May 2025, 15:16

Type Values Removed Values Added
New CVE
Information

Published : 2025-05-01 15:16

Updated : 2025-11-07 18:40

NVD link : CVE-2022-49776

Mitre link : CVE-2022-49776

CVE.ORG link : CVE-2022-49776

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
NVD-CWE-noinfo