Security readout for executives and security teams
Plain-English summary
CVE-2023-53230 is a Linux kernel SMB client memory leak issue. A local low-privileged user may be able to affect availability when SMB3/CIFS mount handling hits the vulnerable path. The public sources do not show active exploitation or remote compromise.
Executive priority
Treat as a routine but real availability patching item. Prioritize shared infrastructure and systems where local users or workloads can initiate SMB/CIFS mounts. There is no sourced evidence of active exploitation.
Technical view
The vulnerability is in cifs_smb3_do_mount() in the Linux kernel SMB client. The CVE describes a possible leak of cifs_sb reported by kernel test robot. CVSS is 5.5 with local attack vector, low complexity, low privileges, no user interaction, and high availability impact only.
Likely exposure
Exposure is most relevant to Linux systems on affected kernel versions where SMB/CIFS client mounting is present or used by local users or services. Internet exposure is not indicated by the CVSS vector or sources.
Exploitation context
No KEV listing is present, and the supplied sources do not report exploitation in the wild. The evidence supports a local availability-risk scenario, not remote code execution, data theft, or privilege escalation.
Researcher notes
The source bundle is sparse: it identifies a memory leak warning and stable kernel fixes, but does not provide detailed exploitability analysis. Keep analysis constrained to local, low-privilege availability impact unless new vendor evidence appears.
Mitigation direction
- Update affected Linux kernels using vendor or distribution guidance.
- Prioritize systems that use SMB/CIFS client mounts.
- Confirm the fixed stable kernel commits are included in deployed packages.
- Restrict local ability to initiate SMB/CIFS mounts where unnecessary.
- Monitor vendor advisories for distribution-specific fixed versions.
Validation and detection
- Inventory running Linux kernel versions across servers and endpoints.
- Compare kernel packages against vendor fixed releases or listed stable commits.
- Identify systems using SMB/CIFS client mount functionality.
- Confirm patched kernels are active after reboot.
- Review monitoring for unusual local mount failures or availability degradation.
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-401: Exact CWE lookup
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Open ATT&CK lookupCVE-2023-53230 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
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/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.
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:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H1.83.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- 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
- https://git.kernel.org/stable/c/9850867042674361f455ea8901375cff5b800be5CVE reference, Linux
- https://git.kernel.org/stable/c/945f4a7aff84fde1f825d17a5050880345da3228CVE reference, Linux
- https://git.kernel.org/stable/c/eb79f8dfba343667f9a82a252743f4e8f67ce420CVE reference, Linux
- https://git.kernel.org/stable/c/12c30f33cc6769bf411088a2872843c4f9ea32f9CVE reference, Linux
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.
Missing Release of Memory after Effective Lifetime
Missing Release of Memory after Effective Lifetime represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.