Security readout for executives and security teams
Plain-English summary
CVE-2023-53191 is a Linux kernel maintenance security fix for a reference-count leak in the Alpine MSI interrupt controller code. The public record does not describe data theft, privilege escalation, or remote attack impact. Business urgency is mainly for organizations running affected Linux kernels on hardware using this driver.
Executive priority
Treat as routine kernel hygiene unless asset inventory shows affected Alpine MSI platforms in critical service. There is no cited evidence of active exploitation or high-impact compromise.
Technical view
The issue is in irqchip/alpine-msi, where alpine_msix_init_domains calls of_irq_find_parent(), which returns a device-tree node with an incremented reference count. The fix adds of_node_put() when the node is no longer needed, preventing a reference-count leak.
Likely exposure
Exposure appears limited to Linux systems using affected kernel versions and the Alpine MSI interrupt-controller path. The source bundle does not show broad remote exposure, affected distributions, or cloud-service impact.
Exploitation context
No active exploitation is indicated. The CVE is not marked KEV, and the provided sources do not describe exploit availability, attacker prerequisites, or weaponized use.
Researcher notes
The public evidence only supports a refcount leak in a specific kernel driver path. Impact details are sparse, with no CVSS, CWE, exploit notes, or vendor distribution mapping in the bundle.
Mitigation direction
- Apply the relevant Linux stable kernel fix or vendor kernel update.
- Prioritize systems using Alpine MSI or matching embedded/platform kernels.
- Check Linux distribution advisories for packaged fixed kernel versions.
- Track kernel upgrades through normal maintenance and reboot planning.
Validation and detection
- Inventory Linux kernel versions against the affected version list.
- Identify whether the Alpine MSI irqchip driver is present and used.
- Confirm vendor kernel changelogs include the referenced stable commits.
- Verify updated systems boot into the remediated kernel.
Public sources used
- CVE Program
- CVE List V5
- Linux stable commit eef04516f0c317ce80502c1d6b0d06235a87cd8f
- Linux stable commit eef09f786df4b34b97557929287c4e5a83bbf09b
- Linux stable commit 9e79ac4f70fd51243e1c6108d4b0baf16cfde99c
- Linux stable commit c9aaf4efe1f02b2fef21a69fb3652f5ad12a5710
- Linux stable commit d6c66c46889752fa4962c6388516f7ab66a8d6a1
- Linux stable commit 65e30bd1310d90b794c377bf405394157854aa30
- Linux stable commit 5fbf2cc39b62a4afe44f3d42ee3dcf8f012c1926
- Linux stable commit 071d068b89e95d1b078aa6bbcb9d0961b77d6aa1
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
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CVE-2023-53191 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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.
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.
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/eef04516f0c317ce80502c1d6b0d06235a87cd8fCVE reference, Linux
- https://git.kernel.org/stable/c/eef09f786df4b34b97557929287c4e5a83bbf09bCVE reference, Linux
- https://git.kernel.org/stable/c/9e79ac4f70fd51243e1c6108d4b0baf16cfde99cCVE reference, Linux
- https://git.kernel.org/stable/c/c9aaf4efe1f02b2fef21a69fb3652f5ad12a5710CVE reference, Linux
- https://git.kernel.org/stable/c/d6c66c46889752fa4962c6388516f7ab66a8d6a1CVE reference, Linux
- https://git.kernel.org/stable/c/65e30bd1310d90b794c377bf405394157854aa30CVE reference, Linux
- https://git.kernel.org/stable/c/5fbf2cc39b62a4afe44f3d42ee3dcf8f012c1926CVE reference, Linux
- https://git.kernel.org/stable/c/071d068b89e95d1b078aa6bbcb9d0961b77d6aa1CVE 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.