CVE-2026-104031— Sssd: sssd: denial of service via memory exhaustion in autofs responder
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。在启用了 autofs 响应器服务的配置中，成功处理请求时分配的内存直到客户端连接终止才会被释放。本地攻击者可以通过保持开放连接并重复提交有效请求来利用此漏洞，导致内存耗尽和服务拒绝（DoS）。
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2026-104031
Vulnerability Information
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Vulnerability Title
Sssd: sssd: denial of service via memory exhaustion in autofs responder
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in SSSD. In configurations where the autofs responder service is enabled, memory allocated during successful request processing is not released until the client connection terminates. A local attacker can exploit this vulnerability by maintaining an open connection and repeatedly submitting valid requests, leading to memory exhaustion and a Denial of Service (DoS).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对已超过有效生命周期的资源丧失索引
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-2026-104031
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-104031 (2)
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🔗 2479418 – (CVE-2026-104031) CVE-2026-104031 sssd: SSSD: Denial of Service via memory exhaustion in autofs responder Read full article issue-tracking x_refsource_REDHAT
Same Patch Batch · Red Hat · 2026-10-06 · 16 CVEs total
| CVE-2026-92821 | 6.8 MEDIUM | Sssd: sssd: access control bypass via premature ldap access rule evaluation |
| 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-2026-104043 | 5.5 MEDIUM | Sssd: sssd: denial of service via undersized packet parsing in nss responder |
| CVE-2026-104042 | 5.5 MEDIUM | Sssd: sssd: denial of service via out-of-bounds read in pam responder |
| CVE-2026-104041 | 5.5 MEDIUM | Sssd: sssd: denial of service via unbounded negative cache growth |
| CVE-2026-104037 | 5.5 MEDIUM | Sssd: sssd: denial of service via packet length underflow in autofs responder |
| CVE-2026-104035 | 5.5 MEDIUM | Sssd: sssd: denial of service via memory exhaustion in kcm responder |
| CVE-2026-104032 | 5.5 MEDIUM | Sssd: sssd: denial of service via unprivileged autofs cache invalidation |
| CVE-2026-105305 | 5.4 MEDIUM | Keycloak-services: keycloak-services: device authorization grant bypasses per-client minim |
| CVE-2026-104033 | 5.4 MEDIUM | Sssd: sssd: access control bypass via improper ldap shadow expiration check |
| CVE-2026-104039 | 4.7 MEDIUM | Sssd: sssd: denial of service via stale connection state reuse in pam gssapi responder |
| CVE-2026-104034 | 4.7 MEDIUM | Sssd: sssd: denial of service via use-after-free in kcm ticket renewal |
| CVE-2026-104040 | 4.4 MEDIUM | Sssd: sssd: information disclosure via odata injection in entra id lookups |
IV. Related Vulnerabilities
Same product: Red Hat Enterprise Linux 10
-
CVE-2026-104044
Sssd: sssd: denial of service via crafted passkey kerberos a -
CVE-2026-104043
Sssd: sssd: denial of service via undersized packet parsing -
CVE-2026-104042
Sssd: sssd: denial of service via out-of-bounds read in pam -
CVE-2026-104041
Sssd: sssd: denial of service via unbounded negative cache g -
CVE-2026-104040
Sssd: sssd: information disclosure via odata injection in en
Same vendor: Red Hat
-
CVE-2026-105305
Keycloak-services: keycloak-services: device authorization g -
CVE-2026-104044
Sssd: sssd: denial of service via crafted passkey kerberos a -
CVE-2026-104043
Sssd: sssd: denial of service via undersized packet parsing -
CVE-2026-104042
Sssd: sssd: denial of service via out-of-bounds read in pam -
CVE-2026-104041
Sssd: sssd: denial of service via unbounded negative cache g
Same weakness: CWE-772
-
CVE-2026-104035
Sssd: sssd: denial of service via memory exhaustion in kcm r -
CVE-2026-97686
VxWorks 7 Memory Resource leak -
CVE-2026-79677
Apache Tomcat: WebSocket DoS due to lost asynchronous write -
CVE-2026-94625
vLLM through 0.29.0 Resource Exhaustion via Ownerless Moonca -
CVE-2026-92983
InternLM LMDeploy through 0.17.0 Memory Exhaustion via Sessi
V. Comments for CVE-2026-104031
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