Security readout for executives and security teams
Plain-English summary
A flaw in the Linux rtw89 PCI Wi-Fi driver can crash systems using the Realtek RTL8922DE when the driver processes a malformed transmission release report. Exposure appears hardware-specific. The supplied CVSS score is 8.8, but the public description establishes a crash risk, not demonstrated data theft or system compromise.
Executive priority
Prioritize identification and patching of affected RTL8922DE endpoints, especially operationally important laptops or appliances. Treat this as a high-severity availability concern, while avoiding assumptions of proven compromise. Systems without this hardware and driver combination are unlikely to be exposed based on the supplied description.
Technical view
The rtw89 PCI path may receive a malformed TX release report associated with an SKB. For RTL8922DE, report content was used without sufficient validation, potentially causing a kernel crash. The referenced Linux stable changes add validation rules before processing. The underlying reason malformed reports occur remains unclear.
Likely exposure
Likely exposure is limited to Linux systems using the rtw89 PCI driver with RTL8922DE hardware. The bundle identifies Linux 6.18, 6.18.16, 6.19.6, and 7.0 as affected, but does not clearly map each referenced fix to release versions. Distribution backports may change actual status.
Exploitation context
The CVSS vector describes adjacent-network reachability with low complexity and no privileges or user interaction. However, the supplied sources provide no exploit demonstration, and the CVE is not listed as KEV. There is no source-grounded evidence here of active exploitation or reliable confidentiality or integrity impact.
Researcher notes
The public record says malformed SKB release reports were observed on existing chips without a clear cause. The RTL8922DE changes therefore add defensive validation ahead of processing. The CVSS claims high confidentiality, integrity, and availability impact, but the narrative only documents crash avoidance; deeper security consequences are not established by this bundle.
Mitigation direction
- Check Linux distribution or vendor advisories for packages incorporating the three referenced stable commits.
- Prioritize kernel updates on systems confirmed to use RTL8922DE with the rtw89 PCI driver.
- Follow vendor guidance for temporary mitigations if an approved kernel update is unavailable.
Validation and detection
- Inventory Linux endpoints for RTL8922DE wireless hardware and the active rtw89 PCI driver.
- Compare installed kernels against distribution advisories and documented backports, not version numbers alone.
- Confirm the installed kernel source or package includes the applicable referenced validation commit.
- Review kernel and driver logs for rtw89 faults, malformed reports, or unexplained crashes.
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
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ATT&CK lookup starting points
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CVE-2026-43176 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:L/PR:N/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:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H2.85.9LinuxVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:A/AC:L/PR:N/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/ebeaa3b24ba568ff8505165f954dba15cc53e4b3CVE reference, Linux
- https://git.kernel.org/stable/c/3e8a88b5e8b3506d9c5e031a65ba65ce9a0683a3CVE reference, Linux
- https://git.kernel.org/stable/c/5f93d611b33a05bd03d6843c8efe8cb6a1992620CVE 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.