Security readout for executives and security teams
Plain-English summary
This is a Linux kernel driver memory leak fixed in the Freescale IFC memory controller path. If device probing fails, allocated private memory was not freed. The source bundle does not cite remote exploitation, privilege escalation, or active exploitation.
Executive priority
Treat this as routine kernel maintenance unless your fleet includes affected Freescale/NXP IFC platforms. There is no source-backed active exploitation signal, but kernel memory leaks should still be removed through normal patch cycles.
Technical view
CVE-2021-47314 resolves a probe-error cleanup bug in the Linux kernel fsl_ifc memory driver by switching the private structure allocation to resource-managed allocation. Affected Linux kernel versions and multiple stable commits are listed, but no CVSS, CWE, or exploit details are provided.
Likely exposure
Exposure is most likely on Linux systems using kernels in the affected ranges with the fsl_ifc driver relevant to Freescale/NXP IFC hardware. General-purpose systems without this driver or hardware are less likely to be affected.
Exploitation context
The bundle marks KEV as false and provides no cited evidence of active exploitation. The described issue is a memory leak on driver probe failure, so practical impact appears tied to local hardware initialization failure conditions.
Researcher notes
Evidence is limited to the CVE description and kernel stable commit references. The affected-version data is unusual and should be reconciled with downstream vendor kernel packaging before making fleet-level conclusions.
Mitigation direction
- Update affected Linux kernels to vendor-supported releases containing the stable fsl_ifc fix.
- Prioritize Freescale/NXP IFC hardware or custom kernels enabling the fsl_ifc driver.
- Check distribution or appliance vendor advisories for backported fixes.
- If unused, remove fsl_ifc support from custom kernels only under vendor guidance.
Validation and detection
- Inventory Linux kernel versions against the affected ranges in the CVE record.
- Confirm whether the fsl_ifc driver is built, loaded, or required by platform hardware.
- Check vendor kernel changelogs for the referenced stable commits or backports.
- Review boot and hardware initialization records for fsl_ifc probe failures.
Public sources used
- CVE Program
- CVE List V5
- Linux stable commit 8018476756066e97ecb886c3dc024aeb7d5792ad
- Linux stable commit 3b45b8a7d549bd92ec94b5357c2c2c1a7ed107e4
- Linux stable commit 7626ffbea708e5aba6912295c012d2b409a1769f
- Linux stable commit ee1aa737ba0b75ab8af3444c4ae5bdba36aed6e6
- Linux stable commit 443f6ca6fd186b4fa4e6f377b6e19a91feb1a0d5
- Linux stable commit b5789e23773f4a852fbfe244b63f675e265d3a7f
- Linux stable commit 48ee69825f7480622ed447b0249123236d3b3ad0
- Linux stable commit a6b45b4932f7b0c36b41fb56a35ad679ece939a0
- Linux stable commit 8e0d09b1232d0538066c40ed4c13086faccbdff6
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-2021-47314 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.
SSVC decision data
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/8018476756066e97ecb886c3dc024aeb7d5792adCVE reference, Linux
- https://git.kernel.org/stable/c/3b45b8a7d549bd92ec94b5357c2c2c1a7ed107e4CVE reference, Linux
- https://git.kernel.org/stable/c/7626ffbea708e5aba6912295c012d2b409a1769fCVE reference, Linux
- https://git.kernel.org/stable/c/ee1aa737ba0b75ab8af3444c4ae5bdba36aed6e6CVE reference, Linux
- https://git.kernel.org/stable/c/443f6ca6fd186b4fa4e6f377b6e19a91feb1a0d5CVE reference, Linux
- https://git.kernel.org/stable/c/b5789e23773f4a852fbfe244b63f675e265d3a7fCVE reference, Linux
- https://git.kernel.org/stable/c/48ee69825f7480622ed447b0249123236d3b3ad0CVE reference, Linux
- https://git.kernel.org/stable/c/a6b45b4932f7b0c36b41fb56a35ad679ece939a0CVE reference, Linux
- https://git.kernel.org/stable/c/8e0d09b1232d0538066c40ed4c13086faccbdff6CVE 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.