CVE-2026-6245
Full vulnerability record from the local CVENow database.
Description
A flaw was found in the System Security Services Daemon (SSSD). The pam_passkey_child_read_data() function within the PAM passkey responder fails to properly handle raw bytes received from a pipe. Because the data is treated as a NUL-terminated C string without explicit termination, it results in an out-of-bounds read when processed by functions like snprintf(). A local attacker could potentially trigger this vulnerability by initiating a crafted passkey authentication request, causing the SSSD PAM responder to crash, resulting in a local Denial of Service (DoS).
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Analyzed
Source identifier
Published
2026-04-15 19:16:38.250000
Last modified
2026-10-26 22:10:00.163000
View original CVE JSON
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"sourceIdentifier": "[email protected]",
"published": "2026-04-15T19:16:38.250",
"lastModified": "2026-10-26T22:10:00.163",
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"value": "A flaw was found in the System Security Services Daemon (SSSD). The pam_passkey_child_read_data() function within the PAM passkey responder fails to properly handle raw bytes received from a pipe. Because the data is treated as a NUL-terminated C string without explicit termination, it results in an out-of-bounds read when processed by functions like snprintf(). A local attacker could potentially trigger this vulnerability by initiating a crafted passkey authentication request, causing the SSSD PAM responder to crash, resulting in a local Denial of Service (DoS)."
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"value": "Se encontró una falla en el demonio de servicios de seguridad del sistema (SSSD). La función pam_passkey_child_read_data() dentro del respondedor de clave de paso PAM no maneja correctamente los bytes sin procesar recibidos de una tubería. Debido a que los datos se tratan como una cadena C terminada en NUL sin terminación explícita, resulta en una lectura fuera de límites cuando son procesados por funciones como snprintf(). Un atacante local podría potencialmente activar esta vulnerabilidad al iniciar una solicitud de autenticación de clave de paso manipulada, lo que provoca que el respondedor PAM de SSSD falle, lo que resulta en una denegación de servicio (DoS) local."
}
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"affected": [
{
"source": "[email protected]",
"affectedData": [
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