Security readout for executives and security teams
Plain-English summary
A local, low-privileged user may be able to trigger an out-of-bounds write in the Linux kernel’s IIO code. Successful exploitation could compromise system confidentiality, integrity, and availability. The supplied record rates it 7.8 high, but does not document real-world exploitation.
Executive priority
Treat as a high-priority kernel maintenance issue, especially on systems permitting untrusted local users. It is not supported as an emergency internet-wide threat because exploitation requires local access and no active exploitation is reported. Prompt vendor-guided patching is appropriate.
Technical view
A fixed-size 20-character buffer could receive oversized input through simple_write_to_buffer. The copied count could be truncated without safely validating the original input size or consistently placing a null terminator, creating a potential out-of-bounds write. The referenced kernel changes add an input-size check and terminate the copied data.
Likely exposure
Exposure is limited to Linux systems running an affected kernel and exposing the vulnerable IIO write path to a local user. The bundle lists 6.15, 6.15.9, and 6.16 among affected versions, but its version-range structure is ambiguous. Confirm status with the kernel or distribution vendor.
Exploitation context
The CVSS vector requires local access and low privileges, with no user interaction. KEV status is false, and the supplied sources provide no evidence of active exploitation or a public exploit. Reachability requirements beyond the affected IIO path are not documented.
Researcher notes
The record describes a potential out-of-bounds write caused by oversized input handling and string termination. It does not identify the exact exposed interface, required IIO configuration, crash behavior, exploit reliability, or fixed release boundaries. Avoid inferring remote reachability or confirmed privilege escalation from CVSS impacts alone.
Mitigation direction
- Check distribution or Linux stable guidance for fixed kernel package versions.
- Upgrade to a vendor-supported kernel incorporating either referenced corrective commit.
- Prioritize shared, multi-user, and locally accessible systems while assessing exposure.
- Use vendor-recommended temporary mitigations if immediate kernel replacement is unavailable.
Validation and detection
- Record each system’s running kernel version and distribution package release.
- Compare package status against current Linux stable or distribution advisories.
- Verify the installed kernel includes a referenced corrective commit or vendor backport.
- Reboot after upgrading and confirm the fixed kernel is running.
- Review local-user exposure and whether affected IIO functionality is present.
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-2025-38667 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/81a635b6eccd6fc889f6d07ab9583b705f739ce1CVE reference, Linux
- https://git.kernel.org/stable/c/16285a0931869baa618b1f5d304e1e9d090470a8CVE 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.