CVE-2026-104041— Sssd: sssd: denial of service via unbounded negative cache growth
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。未经授权的本地用户可通过名称服务交换（NSS）响应者反复请求查找不存在的条目。由于负缓存未限制存储条目的总数，且仅在重新检查现有键时才移除过期记录，因此缓存可能无限增长。此行为可能导致内存耗尽，使响应者变得无响应或终止，从而导致拒绝服务（DoS）。
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I. Basic Information for CVE-2026-104041
Vulnerability Information
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Vulnerability Title
Sssd: sssd: denial of service via unbounded negative cache growth
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in SSSD. An unprivileged local user can repeatedly request lookups for nonexistent entries through the Name Service Switch (NSS) responder. Because the negative cache does not limit the total number of stored entries and only removes expired records when an existing key is rechecked, the cache can grow without bound. This behavior can lead to memory exhaustion, resulting in a Denial of Service (DoS) as the responder becomes unresponsive or terminates.
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
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-2026-104041
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-104041 (2)
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🔗 2478864 – (CVE-2026-104041) CVE-2026-104041 sssd: sssd: Denial of Service via unbounded negative cache growth 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-2026-104037 | 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-2026-104031 | 5.5 MEDIUM | Sssd: sssd: denial of service via memory exhaustion in autofs responder |
| 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-2026-104040
Sssd: sssd: information disclosure via odata injection in en -
CVE-2026-104039
Sssd: sssd: denial of service via stale connection state reu
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-2026-104040
Sssd: sssd: information disclosure via odata injection in en
Same weakness: CWE-770
-
CVE-2026-105758
vLLM: Qwen2-VL / Qwen3-VL video samplers bound on request-co -
CVE-2026-105686
Penpot: Repeated chunk index causes temporary-storage amplif -
CVE-2026-94201
Filtering an :atom attribute with unsafe_to_atom? can exhaus -
CVE-2026-104713
Apache Struts: Unbounded request body read in the REST plugi -
CVE-2026-104893
Plane: Improper validation allows arbitrary modification of
V. Comments for CVE-2026-104041
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