Security readout for executives and security teams
Plain-English summary
CVE-2023-52903 is a Linux kernel io_uring flaw involving locking during IOPOLL completion overflow handling. It is rated high because a local low-privileged user could potentially impact confidentiality, integrity, and availability. The provided sources do not show active exploitation.
Executive priority
Treat as a high-priority Linux patching issue for multi-user, shared, or workload-hosting systems. It is less urgent than a remotely exploitable internet-facing flaw, but local privilege conditions make it important for defense-in-depth and tenant isolation.
Technical view
The issue is in Linux kernel io_uring, where IOPOLL overflow handling could occur without the expected locking, especially in IOPOLL|SQPOLL paths. The CVSS vector is local, low complexity, low privileges, no user interaction, with high CIA impact. Stable kernel commits are listed as references for the resolution.
Likely exposure
Exposure is most relevant on Linux systems running affected kernel versions where local users or untrusted workloads can interact with io_uring. Internet-facing status alone is not the main risk signal because the CVSS attack vector is local.
Exploitation context
The source bundle lists no CISA KEV entry and provides no public evidence of active exploitation. Practical risk depends on whether an attacker already has local code execution or low-privileged access on the Linux host.
Researcher notes
The evidence identifies the affected subsystem and stable kernel fix references, but not exploit availability or distribution-specific package status. Version mapping should be confirmed against the CVE record and downstream vendor advisories before declaring systems fixed or affected.
Mitigation direction
- Update to a vendor-supported kernel containing the referenced stable fixes.
- Check Linux distribution advisories for backported fixes and exact package versions.
- Prioritize shared hosts and systems running untrusted local workloads.
- If immediate patching is unavailable, follow vendor guidance for temporary risk reduction.
Validation and detection
- Inventory Linux kernel versions across servers, containers hosts, and endpoints.
- Confirm whether distribution kernel packages include the referenced stable commits.
- Validate vulnerability status with authenticated vulnerability scanning or vendor package metadata.
- Monitor CVE and distribution advisories for revised affected-version guidance.
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.
CVE-2023-52903 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
- High
- CVSS
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9LinuxVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/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.
- 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/de77faee280163ff03b7ab64af6c9d779a43d4c4CVE reference, Linux
- https://git.kernel.org/stable/c/ed4629d1e968359fbb91d0a3780b1e86a2c08845CVE reference, Linux
- https://git.kernel.org/stable/c/7fc3990dad04a677606337ebc61964094d6cb41bCVE reference, Linux
- https://git.kernel.org/stable/c/544d163d659d45a206d8929370d5a2984e546cb7CVE 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.