CVE-2026-58085
Full vulnerability record from the local CVENow database.
Description
After dispatching a decrypt operation to OCF and receiving the result, the wg(4) driver failed to check whether the MAC verification step succeeded. The driver thus silently accepted packets with an invalid Poly1305 authentication tag. A remote attacker who can send UDP packets to a WireGuard endpoint, and who can guess the bounds of the receiver's replay window, can inject forged or modified transport data packets into the tunnel. A remote attacker who can intercept WireGuard packets bound for a FreeBSD host can modify the ciphertext and authenticated data without detection by the receiver.
Severity
HIGH
CVSS score
7.5
(v3.1)
Vulnerability status
Analyzed
Source identifier
Published
2026-08-19 08:17:12.673000
Last modified
2026-10-27 12:10:00.343000
View original CVE JSON
{
"id": "CVE-2026-58085",
"sourceIdentifier": "[email protected]",
"published": "2026-08-19T08:17:12.673",
"lastModified": "2026-10-27T12:10:00.343",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "After dispatching a decrypt operation to OCF and receiving the result, the wg(4) driver failed to check whether the MAC verification step succeeded. The driver thus silently accepted packets with an invalid Poly1305 authentication tag.\n\nA remote attacker who can send UDP packets to a WireGuard endpoint, and who can guess the bounds of the receiver's replay window, can inject forged or modified transport data packets into the tunnel.\n\nA remote attacker who can intercept WireGuard packets bound for a FreeBSD host can modify the ciphertext and authenticated data without detection by the receiver."
},
{
"lang": "es",
"value": "Después de enviar una operación de descifrado a OCF y recibir el resultado, el controlador wg(4) no verificó si el paso de verificación MAC tuvo éxito. El controlador, por lo tanto, aceptó silenciosamente paquetes con una etiqueta de autenticación Poly1305 inválida.\n\nUn atacante remoto que puede enviar paquetes UDP a un punto final de WireGuard, y que puede adivinar los límites de la ventana de reproducción del receptor, puede inyectar paquetes de datos de transporte falsificados o modificados en el túnel.\n\nUn atacante remoto que puede interceptar paquetes WireGuard destinados a un host FreeBSD puede modificar el texto cifrado y los datos autenticados sin ser detectado por el receptor."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "FreeBSD",
"product": "FreeBSD",
"defaultStatus": "unknown",
"modules": [
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],
"versions": [
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}
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"baseScore": 7.5,
"baseSeverity": "HIGH",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"availabilityImpact": "NONE"
},
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"id": "CVE-2026-58085",
"options": [
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{
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{
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],
"role": "CISA Coordinator",
"version": "2.0.3"
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},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-347"
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"references": [
{
"url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:52.if_wg.asc",
"source": "[email protected]",
"tags": [
"Vendor Advisory"
]
}
]
}