Security readout for executives and security teams
Plain-English summary
This is a Linux kernel driver flaw in the AD7124 analog-to-digital converter path. A local user with limited privileges could trigger a storage overflow condition when channel numbering is non-sequential, potentially causing system unavailability. Exposure is likely limited to systems using this specific hardware driver.
Executive priority
Treat this as a targeted availability risk for Linux systems tied to AD7124 hardware, not a broad internet-facing emergency. Prioritize patching where affected devices support production operations or safety-relevant monitoring.
Technical view
The Linux kernel AD7124 IIO ADC driver could overflow available storage when channel numbers do not start at 0 and contain no gaps. The CVSS vector is local, low complexity, low privilege, no user interaction, with high availability impact and no stated confidentiality or integrity impact.
Likely exposure
Most general-purpose servers are unlikely to be exposed unless they load or ship the AD7124 ADC driver. Embedded, industrial, lab, or hardware-control Linux systems using AD7124 devices are the most plausible exposure group.
Exploitation context
The source bundle does not report active exploitation, and KEV is false. The documented attack path is local with low privileges and appears focused on denial of service through the affected driver condition.
Researcher notes
The public description identifies the root condition but gives limited operational detail. Avoid assuming remote reachability or broad exploitability. Focus analysis on kernel version, driver inclusion, device configuration, and whether vendor kernels have backported the stable fixes.
Mitigation direction
- Apply a vendor kernel update containing the referenced stable fixes.
- Check Linux distribution advisories for backported AD7124 driver fixes.
- Disable or avoid loading the AD7124 driver where it is unused.
- Until patched, avoid non-sequential AD7124 channel numbering where operationally feasible.
Validation and detection
- Inventory systems for affected Linux kernel versions and AD7124 driver usage.
- Confirm whether the running kernel includes one of the referenced stable commits.
- Review AD7124 channel definitions for numbering gaps before patching.
- Run vendor-approved regression tests on hardware-control or embedded workloads.
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-120: 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-2021-47172 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/f49149964d2423fb618fb6b755bb1eaa431cca2cCVE reference, Linux
- https://git.kernel.org/stable/c/f70122825076117787b91e7f219e21c09f11a5b9CVE reference, Linux
- https://git.kernel.org/stable/c/26da8040eccc6c6b0e415e9a3baf72fd39eb2fdcCVE reference, Linux
- https://git.kernel.org/stable/c/f2a772c51206b0c3f262e4f6a3812c89a650191bCVE 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.
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.