Security readout for executives and security teams
Plain-English summary
A flaw in the Linux kernel SMB client can mishandle a malicious encrypted SMB response, causing an out-of-bounds memory read and potentially crashing the system. The supplied evidence supports denial of service, despite the title mentioning remote code execution. Exploitation requires network proximity, significant complexity, limited privileges, and user interaction.
Executive priority
Treat this as a scheduled, risk-based kernel update rather than an emergency. Accelerate remediation for systems using SMB with untrusted or less-controlled servers, especially where a kernel crash would disrupt critical operations. Current evidence does not establish active exploitation or remote code execution.
Technical view
An integer underflow in receive_encrypted_standard within fs/smb/client/smb2ops.c can produce an invalid memcpy length while processing encrypted SMB traffic. This results in an out-of-bounds read. The CVSS 3.1 score is 6.8, with adjacent-network access, high complexity, low privileges, and user interaction required.
Likely exposure
Exposure is most relevant to systems using affected Linux or Red Hat kernel packages as CIFS/SMB clients, particularly when processing encrypted SMB responses. The bundle lists affected RHEL 8, RHEL 9, EUS, real-time, virtualization, and related packages. Confirm applicability through the vendor advisories.
Exploitation context
The CVE is not listed in KEV, and the supplied sources do not report active exploitation. The CVSS vector indicates adjacent-network positioning, high attack complexity, low privileges, and user interaction. No conclusion about practical remote code execution should be drawn from the title alone.
Researcher notes
The source bundle contains conflicting signals: its title says remote code execution, while the description identifies an out-of-bounds read leading to denial of service. The CVSS vector claims high confidentiality, integrity, and availability impact, but no supporting exploitation mechanism is provided. Further vendor analysis is needed before asserting code execution.
Mitigation direction
- Apply the applicable vendor kernel security update identified in the Red Hat advisories.
- Follow vendor guidance for activating the updated kernel package.
- Prioritize systems that mount or access untrusted SMB shares.
- Restrict SMB connectivity to trusted servers and networks where operationally feasible.
Validation and detection
- Inventory installed and running kernel versions on Linux SMB client systems.
- Compare kernel packages with the affected versions and applicable vendor advisories.
- Identify systems using CIFS mounts or encrypted SMB sessions.
- Confirm the vendor update is installed and the corrected kernel is active.
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-191: 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2024-0565 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
- 6.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:H/I:H/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.
SSVC decision data
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:A/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H0.95.9redhatVulnerability scoring details
Base CVSS 3.1 score
6.8MediumVector: CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- Source timelineredhat
Made public.
- Source timelineredhat
Reported to Red Hat.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- RHSA-2024:1188CVE reference, redhat · vendor-advisory, x_refsource_REDHAT
- RHSA-2024:1404CVE reference, redhat · vendor-advisory, x_refsource_REDHAT
- RHSA-2024:1532CVE reference, redhat · vendor-advisory, x_refsource_REDHAT
- RHSA-2024:1533CVE reference, redhat · vendor-advisory, x_refsource_REDHAT
- RHSA-2024:1607CVE reference, redhat · vendor-advisory, x_refsource_REDHAT
- RHSA-2024:1614CVE reference, redhat · vendor-advisory, x_refsource_REDHAT
- RHSA-2024:2093CVE reference, redhat · vendor-advisory, x_refsource_REDHAT
- RHSA-2024:2394CVE reference, redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2024-0565CVE reference, redhat · vdb-entry, x_refsource_REDHAT
- RHBZ#2258518CVE reference, redhat · issue-tracking, x_refsource_REDHAT
- https://www.spinics.net/lists/stable-commits/msg328851.htmlCVE reference, redhat
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.htmlCVE reference, CVE · x_transferred
- https://security.netapp.com/advisory/ntap-20240223-0002/CVE reference, CVE · 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.
Integer Underflow (Wrap or Wraparound)
Integer Underflow (Wrap or Wraparound) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.