--- title: "CVE-2023-34966: Samba: infinite loop in mdssvc rpc… | CubePath" description: "An infinite loop vulnerability was found in Samba's mdssvc RPC service for Spotlight. When parsing Spotlight mdssvc RPC packets sent by the client…" language: en source: https://cubepath.com/security/cve/CVE-2023-34966 --- # CVE-2023-34966: Samba: infinite loop in mdssvc rpc… | CubePath ## Description An infinite loop vulnerability was found in Samba's mdssvc RPC service for Spotlight. When parsing Spotlight mdssvc RPC packets sent by the client, the core unmarshalling function sl\_unpack\_loop() did not validate a field in the network packet that contains the count of elements in an array-like structure. By passing 0 as the count value, the attacked function will run in an endless loop consuming 100% CPU. This flaw allows an attacker to issue a malformed RPC request, triggering an infinite loop, resulting in a denial of service condition. Official description from the CVE record, published by redhat. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2023-34966) ## Key data ### CVSS 3.1 High 7.5 Score published by redhat in the CVE record. CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | Metric | Value | What it means | | ---------------------- | --------- | ----------------------------------------------------------------------------------- | | Attack vector | Network | The vulnerable component can be reached over a network, possibly from the Internet. | | Attack complexity | Low | No special conditions are needed. The attack can be repeated at will. | | Privileges required | None | No account or privileges are needed. | | User interaction | None | No action from any user is needed. | | Scope | Unchanged | The impact stays within the vulnerable component. | | Confidentiality impact | None | No effect on the secrecy of data. | | Integrity impact | None | No effect on the trustworthiness of data. | | Availability impact | High | Serious or total effect on availability. | CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) . ### EPSS Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days. Score 0.62402 (62.4% probability) Percentile 99.2% Scores of Nov 10, 2026 Model v2026.06.15 ### Weakness (CWE) CWE catalog version 5.0. CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license. - [CWE-835](https://cwe.mitre.org/data/definitions/835.html) Loop with Unreachable Exit Condition ## Affected products Products listed in the CVE record, as the CNA published them. - Red Hat Enterprise Linux 8 - unaffected: 0:4.18.6-1.el8 up to before \* - Red Hat Enterprise Linux 8 - unaffected: 0:4.18.6-1.el8 up to before \* - Red Hat Enterprise Linux 8.6 Extended Update Support - unaffected: 0:4.15.5-15.el8\_6 up to before \* - Red Hat Enterprise Linux 8.8 Extended Update Support - unaffected: 0:4.17.5-5.el8\_8 up to before \* - Red Hat Enterprise Linux 9 - unaffected: 0:4.18.6-100.el9 up to before \* - Red Hat Enterprise Linux 9 - unaffected: 0:4.18.6-100.el9 up to before \* - Red Hat Enterprise Linux 9.2 Extended Update Support - unaffected: 0:4.17.5-105.el9\_2 up to before \* - Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 - unaffected: 0:4.15.5-15.el8\_6 up to before \* - Red Hat Enterprise Linux 6 - Red Hat Enterprise Linux 6 - Red Hat Enterprise Linux 7 - Red Hat Storage 3 ## References Links listed in the CVE record. They lead to other sites, which CubePath does not control. - [RHSA-2023:6667](https://access.redhat.com/errata/RHSA-2023:6667) (access.redhat.com) vendor-advisory - [RHSA-2023:7139](https://access.redhat.com/errata/RHSA-2023:7139) (access.redhat.com) vendor-advisory - [RHSA-2024:0423](https://access.redhat.com/errata/RHSA-2024:0423) (access.redhat.com) vendor-advisory - [RHSA-2024:0580](https://access.redhat.com/errata/RHSA-2024:0580) (access.redhat.com) vendor-advisory - [RHSA-2024:4101](https://access.redhat.com/errata/RHSA-2024:4101) (access.redhat.com) vendor-advisory - [access.redhat.com/security/cve/CVE-2023-34966](https://access.redhat.com/security/cve/CVE-2023-34966) vdb-entry - [RHBZ#2222793](https://bugzilla.redhat.com/show%5Fbug.cgi?id=2222793) (bugzilla.redhat.com) issue-tracking - [samba.org/samba/security/CVE-2023-34966](https://www.samba.org/samba/security/CVE-2023-34966) - [lists.fedoraproject.org/archives/list/package-announce@list…](https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BPCSGND7LO467AJGR5DYBGZLTCGTOBCC/) - [lists.fedoraproject.org/archives/list/package-announce@list…](https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OT74M42E6C36W7PQVY3OS4ZM7DVYB64Z/) - [security.netapp.com/advisory/ntap-20230731-0010](https://security.netapp.com/advisory/ntap-20230731-0010/) - [debian.org/security/2023/dsa-5477](https://www.debian.org/security/2023/dsa-5477) ## Timeline 1. ID reserved Jun 7, 2023 2. Record published Jul 20, 2023 3. Record last updated Nov 7, 2026 ## Look up another CVE ## About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:04 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)