Security readout for executives and security teams
Plain-English summary
This Linux kernel issue affects Wi-Fi monitor-mode handling in mac80211 on some devices. The public record describes a kernel WARN_ON condition, not confirmed data theft, remote code execution, or active exploitation. Business urgency depends on whether affected Linux kernels and Wi-Fi monitor mode are present in your fleet.
Executive priority
Treat as targeted maintenance, not an emergency, unless affected Wi-Fi monitor-mode systems are business-critical or configured to crash on kernel warnings.
Technical view
The fix changes mac80211 link-change handling so monitor interfaces on devices without WANT_MONITOR_VIF, and likely without channel context support, do not hit an inappropriate WARN_ON when per-link settings change.
Likely exposure
Exposure appears limited to Linux systems using affected kernel versions and Wi-Fi devices exercising monitor mode under the described mac80211 conditions. Servers without Wi-Fi, systems not using monitor mode, or kernels carrying the stable fixes are less likely to be exposed.
Exploitation context
CISA KEV status is false in the provided bundle, and no cited source reports active exploitation. The sources do not describe a public exploit, attacker prerequisites, or a demonstrated security impact beyond the WARN_ON condition.
Researcher notes
The record lacks CVSS, CWE, exploit details, and clear impact beyond a WARN_ON. Version data is sparse and should be reconciled against downstream distro backports and the three stable kernel commits.
Mitigation direction
- Check Linux distribution advisories for a kernel update containing the referenced stable fixes.
- Prioritize systems with Wi-Fi hardware and any monitor-mode operational use.
- Avoid unnecessary monitor-mode use on susceptible devices until vendor guidance is confirmed.
- Confirm whether your vendor backported the fix rather than relying only on version strings.
Validation and detection
- Inventory Linux kernel versions across endpoints and appliances with Wi-Fi capability.
- Identify systems using mac80211-based Wi-Fi drivers and monitor-mode workflows.
- Compare installed kernels against vendor advisories and the referenced stable commits.
- Review kernel logs for related mac80211 WARN_ON events on Wi-Fi systems.
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-2025-38642 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/ff15498ebaa49c5429a74e70a1951dede60cd14cCVE reference, Linux
- https://git.kernel.org/stable/c/1e10ded6b0f9b0eeefaacbb6c6c6afff3f702812CVE reference, Linux
- https://git.kernel.org/stable/c/c57e5b9819dfd16d709bcd6cb633301ed0829a66CVE 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.