Security readout for executives and security teams
Plain-English summary
CVE-2022-2127 is a Samba Winbind flaw that can let a malformed NTLM authentication request crash the Winbind service. The business risk is service disruption, not confirmed data theft or code execution. Public data provided does not show active exploitation.
Executive priority
Treat this as a moderate availability risk. Patch during normal vulnerability maintenance, faster for identity, file-sharing, or virtualization environments where a Winbind crash could disrupt business operations.
Technical view
Samba Winbind performs insufficient length checking in winbindd_pam_auth_crap.c. A crafted NTLM authentication response can cause an out-of-bounds read, potentially crashing Winbind. CVSS 3.1 is 5.9 with network attack vector, high complexity, no privileges, no user interaction, and high availability impact.
Likely exposure
Exposure is most likely on servers using Samba Winbind for NTLM authentication. The bundle lists affected Red Hat samba packages for RHEL 8, RHEL 8.6/8.8 EUS, RHEL 9, and Red Hat Virtualization 4. RHEL 6, RHEL 7, and Red Hat Storage 3 status is listed as unknown.
Exploitation context
The source bundle marks KEV as false and provides no cited evidence of active exploitation. Exploitation requires reaching the NTLM authentication path handled by Winbind and supplying a malformed response. The documented outcome is a possible crash, so prioritize availability-sensitive identity and file-sharing systems.
Researcher notes
The available evidence supports CWE-125 out-of-bounds read with availability impact only. Do not infer confidentiality impact, integrity impact, or code execution from the provided sources. Product status is incomplete for some older Red Hat lines.
Mitigation direction
- Apply vendor security updates from the relevant Samba, Red Hat, Debian, Fedora, or NetApp advisory.
- Check vendor guidance for products listed with unknown status before assuming safety.
- Limit network access to Samba/Winbind authentication services where operationally feasible.
- Review NTLM dependency and reduce unnecessary Winbind exposure in sensitive environments.
Validation and detection
- Inventory systems running Samba packages and Winbind services.
- Confirm whether Winbind is used for NTLM authentication.
- Compare installed package versions against applicable vendor advisories.
- Review service logs for unexplained Winbind crashes or authentication-related failures.
- Track unknown-status Red Hat products until vendor guidance confirms impact.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-125: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2022-2127 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.9 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H2.23.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.9MediumVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- RHSA-2023:6667CVE reference · vendor-advisory, x_refsource_REDHAT
- RHSA-2023:7139CVE reference · vendor-advisory, x_refsource_REDHAT
- RHSA-2024:0423CVE reference · vendor-advisory, x_refsource_REDHAT
- RHSA-2024:0580CVE reference · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2022-2127CVE reference · vdb-entry, x_refsource_REDHAT
- RHBZ#2222791CVE reference · issue-tracking, x_refsource_REDHAT
- https://www.samba.org/samba/security/CVE-2022-2127.htmlCVE reference
- https://lists.debian.org/debian-lts-announce/2024/04/msg00015.htmlCVE reference · x_transferred
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BPCSGND7LO467AJGR5DYBGZLTCGTOBCC/CVE reference · x_transferred
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OT74M42E6C36W7PQVY3OS4ZM7DVYB64Z/CVE reference · x_transferred
- https://security.netapp.com/advisory/ntap-20230731-0010/CVE reference · x_transferred
- https://www.debian.org/security/2023/dsa-5477CVE reference · x_transferred
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Out-of-bounds Read
Out-of-bounds Read represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.