Security readout for executives and security teams
Plain-English summary
A local, low-privileged user may trigger a Linux kernel memory write beyond an 80-byte buffer in the Industrial I/O backend. Successful exploitation could compromise confidentiality, integrity, and availability. This is not described as remotely exploitable, and the supplied sources do not establish exploitation in the wild.
Executive priority
Prioritize remediation on multi-user, shared, edge, laboratory, and industrial Linux systems where untrusted local users may access IIO functionality. This is a high-impact local privilege risk, not evidence of a remote emergency. Validate fleet exposure promptly because the supplied version data is not sufficiently clear for automated conclusions.
Technical view
The affected IIO backend truncates oversized input through simple_write_to_buffer, then writes a null terminator at the resulting count offset without verifying space remains. At the buffer limit, that terminator is written out of bounds. The published CVSS 3.1 score is 7.8, requiring local access and low privileges, with potentially high system impact.
Likely exposure
Exposure is most likely on Linux systems running an affected kernel and exposing the vulnerable IIO backend write path to local, low-privileged users. Internet reachability alone does not create direct exposure. The bundle's version entries are ambiguous, so confirm affected and fixed builds through the relevant Linux distribution or kernel guidance.
Exploitation context
The CVE is not listed as KEV in the supplied bundle, and no cited source establishes active exploitation or public weaponization. The CVSS vector indicates local, low-complexity exploitation requiring low privileges and no user interaction. Practical reachability may depend on IIO hardware, driver configuration, and permissions, which the supplied evidence does not fully document.
Researcher notes
The defect appears to be a one-byte out-of-bounds null write when the truncated count reaches the 80-byte capacity. The source says the fix checks that the supplied buffer is smaller than the destination. Exact reachable interfaces, adjacent memory targets, exploit reliability, and distribution backports are not established by the supplied evidence.
Mitigation direction
- Apply the vendor or distribution kernel update containing the cited bounds-check fix.
- Confirm affected and fixed package versions with the relevant Linux distribution advisory.
- Restrict untrusted local access while patching, particularly on systems exposing IIO interfaces.
- Reboot into the updated kernel after installation and verify the running version.
Validation and detection
- Inventory running kernel versions and identify systems using Industrial I/O components.
- Compare kernel package builds against authoritative distribution or kernel guidance.
- Verify the installed fix rejects input that would consume the entire destination buffer.
- Confirm systems booted into the updated kernel rather than retaining the vulnerable build.
- Review local access and permissions associated with exposed IIO backend interfaces.
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
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CVE-2025-38484 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.
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.
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/6eea9f7648ddb9e4903735a1f77cf196c957aa38CVE reference, Linux
- https://git.kernel.org/stable/c/01e941aa7f5175125df4ac5d3aab099961525602CVE reference, Linux
- https://git.kernel.org/stable/c/da9374819eb3885636934c1006d450c3cb1a02edCVE 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.