Security readout for executives and security teams
Plain-English summary
This is a Linux kernel memory leak in irqdomain debugfs cleanup. A local low-privileged user could potentially cause memory to leak over time, creating availability risk. The cited impact is denial of service, not data theft or tampering.
Executive priority
Treat as routine but real availability risk. Prioritize internet-facing infrastructure only if local users or workloads can obtain shell or container-level access; otherwise schedule through normal kernel patch cycles.
Technical view
irqdomain.c used debugfs_lookup() without releasing the returned dentry with dput(). The fix replaces that pattern with debugfs_lookup_and_remove(), which performs lookup and removal cleanup together. CVSS is 5.5 with local access, low complexity, low privileges, no user interaction, and high availability impact.
Likely exposure
Exposure is limited to Linux systems running affected kernel builds. The bundle lists Linux kernel versions and stable fix commits, but exact downstream distribution package status must be confirmed with vendor advisories or backport notes.
Exploitation context
The source bundle does not cite active exploitation, and KEV is false. The CVSS vector indicates local access with low privileges is required. The main risk is resource exhaustion through a memory leak, not confidentiality or integrity compromise.
Researcher notes
Evidence supports CWE-401 memory leak in kernel irqdomain debugfs cleanup. The bundle provides stable commit references but not exploit reports, detailed affected range semantics, or distribution-specific package names. Avoid assuming all Linux versions are affected.
Mitigation direction
- Update to a kernel build containing the referenced stable fixes.
- Check Linux distribution advisories for backported fixes.
- Prioritize shared systems with untrusted local users.
- Monitor vendor kernel packages until fixed builds are installed.
Validation and detection
- Inventory Linux kernel versions across affected assets.
- Compare installed kernels with vendor fixed package lists.
- Confirm whether referenced stable commits are present or backported.
- Review host telemetry for abnormal memory growth symptoms.
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
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-2023-52936 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/066ecbf1a53eb0b92b10c8df7808666be6ea5681CVE reference, Linux
- https://git.kernel.org/stable/c/cf1c917bf1c761a557b26410024e90057646c049CVE reference, Linux
- https://git.kernel.org/stable/c/d83d7ed260283560700d4034a80baad46620481bCVE 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.