Security readout for executives and security teams
Plain-English summary
This is a Linux kernel availability issue in the iwl4965 Wi-Fi driver. A missing error check can lead to a NULL pointer dereference, which may crash affected systems. The CVSS score is medium, and the impact is denial of service rather than data theft or tampering.
Executive priority
Treat as a normal patch-cycle kernel availability fix unless affected Wi-Fi hardware is broadly deployed in business-critical endpoints. It does not indicate remote compromise or data exposure from the provided sources.
Technical view
The iwl4965 driver failed to check the return value from create_singlethread_workqueue(). If allocation fails, later code may dereference NULL. CVSS 3.1 is 5.5: local attack vector, low complexity, low privileges, no user interaction, high availability impact, no confidentiality or integrity impact.
Likely exposure
Exposure is most likely on Linux systems running affected kernel versions with the iwl4965 Wi-Fi driver present or enabled. Systems without that legacy Wi-Fi driver or relevant hardware are less likely to be affected. Confirm against distribution backports because kernel version strings alone may be misleading.
Exploitation context
The provided sources do not show active exploitation, and KEV status is false. The CVSS vector indicates local, low-privilege conditions with no user interaction. The source bundle does not provide detailed trigger mechanics, so practical exploitability should be validated cautiously.
Researcher notes
Focus validation on driver presence, kernel branch, and distro backports. The vulnerable pattern is unchecked workqueue allocation leading to NULL dereference. The bundle names stable commits but does not document an exploit path beyond the local CVSS vector.
Mitigation direction
- Update to a vendor kernel containing the referenced Linux stable fixes.
- Check distribution security advisories for backported iwl4965 driver fixes.
- Disable or avoid loading iwl4965 where it is not needed.
- Prioritize mobile or workstation fleets using legacy Intel Wi-Fi hardware.
Validation and detection
- Inventory Linux kernel versions and distribution patch levels.
- Check whether the iwl4965 driver is built, loaded, or packaged.
- Confirm whether affected devices use supported iwl4965 hardware.
- Map installed kernels against vendor advisories and stable commit references.
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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CWE-476: Exact CWE lookup
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Open ATT&CK lookupCVE-2023-53302 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/874a85051cc8df8c5b928d8ff172b342cdc5424bCVE reference, Linux
- https://git.kernel.org/stable/c/c002d2741400771171b68dde9af937a4dfa0d1b3CVE reference, Linux
- https://git.kernel.org/stable/c/3185d6cfc59277a77bf311dce701b7e25193f66aCVE reference, Linux
- https://git.kernel.org/stable/c/f15ef0ebcf56be1d4a3c9a7a80a1f1f82ab0eaadCVE reference, Linux
- https://git.kernel.org/stable/c/2f85c768bea2057e3299d19514da9e932c4f92d2CVE reference, Linux
- https://git.kernel.org/stable/c/878a7c8357764e08bc778bcb26127fc12a4b36b7CVE reference, Linux
- https://git.kernel.org/stable/c/26e6775f75517ad6844fe5b79bc5f3fa8c22ee61CVE 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.
NULL Pointer Dereference
NULL Pointer Dereference represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.