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CVE-2026-88252— Sssd: sssd: denial of service via responder connection retry loop during file descriptor exhaustion

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中发现了一个缺陷。本地用户可通过耗尽响应器服务可用的文件描述符（即用于开放连接的系统句柄）来导致拒绝服务（DoS）。攻击者通过打开并维持大量与响应器套接字的并发连接，同时继续排队新的连接尝试，可触发一个不受限制的重试循环。该条件会导致CPU利用率急剧升高，并使服务停滞，从而阻止处理合法的身份识别和认证请求。

CVSS 4.7 · Medium

Affected Version Matrix 7

VendorProduct Version RangeStatus
Red Hat Red Hat Enterprise Linux 10 any affected
Red Hat Red Hat Enterprise Linux 6 any unknown
Red Hat Red Hat Enterprise Linux 7 any affected
Red Hat Red Hat Enterprise Linux 8 any affected
Red Hat Red Hat Enterprise Linux 9 any affected
Red Hat Red Hat OpenShift Container Platform 4 any affected
any affected
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I. Basic Information for CVE-2026-88252

Vulnerability Information
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Vulnerability Title
Sssd: sssd: denial of service via responder connection retry loop during file descriptor exhaustion
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in sssd. A local user can cause a Denial of Service (DoS) by exhausting the responder service's available file descriptors (system handles used for open connections). By opening and maintaining many concurrent connections to a responder socket while continuing to queue new connection attempts, an attacker can trigger an unthrottled retry loop. This condition leads to high CPU utilization and stalls the service, preventing legitimate identity and authentication requests from being processed.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不可达退出条件的循环(无限循环)
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-2026-88252

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III. Intelligence Information for CVE-2026-88252

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Other References for CVE-2026-88252 (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-2026-104046 6.2 MEDIUM Sssd: sssd: denial of service via incomplete identity provider authentication requests
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

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-835

V. Comments for CVE-2026-88252

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