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CVE-2026-104046— Sssd: sssd: denial of service via incomplete identity provider authentication requests

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 10
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 SSSD（System Security Services Daemon）中发现了一个漏洞。当启用身份提供者（IdP）认证时，预认证请求会在内存中保留状态信息，而不会被清除或设置超时。本地攻击者可以反复发起认证流程但不完成它们，从而导致内存无限制消耗。这种内存耗尽会通过降低或终止 SSSD 认证服务，导致拒绝服务（DoS）攻击。

CVSS 6.2 · Medium
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I. Basic Information for CVE-2026-104046

Vulnerability Information
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Vulnerability Title
Sssd: sssd: denial of service via incomplete identity provider authentication requests
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in SSSD (System Security Services Daemon). When Identity Provider (IdP) authentication is enabled, pre-authentication requests retain state in memory without being cleared or timed out. A local attacker can repeatedly initiate authentication flows without completing them, causing unbounded memory consumption. This memory exhaustion can lead to a Denial of Service (DoS) by degrading or terminating SSSD authentication services.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Enterprise Linux 10 - cpe:/o:redhat:enterprise_linux:10
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4

II. Public POCs for CVE-2026-104046

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III. Intelligence Information for CVE-2026-104046

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Other References for CVE-2026-104046 (2)

Same Patch Batch · Red Hat · 2026-10-06 · 26 CVEs total

CVE-2026-106062 7.8 HIGH Gimp: gimp: heap buffer overflow in dds loader on crafted directdraw surface file
CVE-2026-101258 7.8 HIGH Ghostscript: ghostscript: -dsafer sandbox bypass via type 5 shading oob write and procedur
CVE-2026-83550 7.1 HIGH Postgres-exporter: net/http/pprof exposed on metrics listener
CVE-2026-104048 6.8 MEDIUM Sssd: sssd: authorization bypass via cross-domain username collision in hbac evaluation
CVE-2026-92821 6.8 MEDIUM Sssd: sssd: access control bypass via premature ldap access rule evaluation
CVE-2026-106063 6.3 MEDIUM Gimp: gimp: heap buffer overflow in dicom export on oversized image dimensions
CVE-2026-104044 6.2 MEDIUM Sssd: sssd: denial of service via crafted passkey kerberos authentication request
CVE-2026-104038 5.9 MEDIUM Sssd: sssd: denial of service via missing sid extension in certificate mapping
CVE-2026-104036 5.8 MEDIUM Sssd: sssd: denial of service via out-of-bounds write in nfs idmap plugin
CVE-2026-104031 5.5 MEDIUM Sssd: sssd: denial of service via memory exhaustion in autofs responder
CVE-2026-104032 5.5 MEDIUM Sssd: sssd: denial of service via unprivileged autofs cache invalidation
CVE-2026-104035 5.5 MEDIUM Sssd: sssd: denial of service via memory exhaustion in kcm responder
CVE-2026-104037 5.5 MEDIUM Sssd: sssd: denial of service via packet length underflow in autofs responder
CVE-2026-104041 5.5 MEDIUM Sssd: sssd: denial of service via unbounded negative cache growth
CVE-2026-104042 5.5 MEDIUM Sssd: sssd: denial of service via out-of-bounds read in pam responder
CVE-2026-104043 5.5 MEDIUM Sssd: sssd: denial of service via undersized packet parsing in nss responder
CVE-2026-105305 5.4 MEDIUM Keycloak-services: keycloak-services: device authorization grant bypasses per-client minim
CVE-2026-106033 5.4 MEDIUM Ansible: ansible-ui: ansible ui dom xss in /redirect next parameter
CVE-2026-104033 5.4 MEDIUM Sssd: sssd: access control bypass via improper ldap shadow expiration check
CVE-2026-104047 5.3 MEDIUM Sssd: sssd: information disclosure via query injection in entra id lookups

Showing top 20 of 26 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-770

V. Comments for CVE-2026-104046

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