Security readout for executives and security teams
Plain-English summary
CVE-2023-52833 is a Linux kernel Bluetooth driver flaw where missing NULL checking can crash the kernel in the btusb MediaTek shutdown path. The public record shows a crash fix, not data theft or privilege escalation. Business impact is mainly availability on Linux systems using the affected Bluetooth stack.
Executive priority
Handle through normal kernel patch governance unless Bluetooth-heavy fleets or crash reports are present. Escalate priority for systems where local availability matters, such as kiosks, field devices, or operational workstations using Bluetooth peripherals.
Technical view
The flaw is in Linux kernel btusb code, specifically btusb_mtk_hci_wmt_sync, where data->evt_skb may be NULL and then dereferenced. The source crash trace reaches the path through Bluetooth close, rfkill block handling, and btusb_mtk_shutdown. Stable kernel commits add the missing NULL check.
Likely exposure
Exposure appears limited to Linux systems running affected kernel versions with the Bluetooth btusb driver path, especially MediaTek-related code. The bundle lists Linux 5.3 and fixed stable lines around 5.10.202, 5.15.140, 6.1.64, 6.5.13, 6.6.3, and 6.7, but version semantics should be confirmed against vendor kernels.
Exploitation context
The provided sources do not show active exploitation, public exploit tooling, KEV listing, or attacker prerequisites. The evidence demonstrates a kernel NULL pointer dereference crash, so treat it as a potential denial-of-service issue until your Linux vendor clarifies severity and reachability.
Researcher notes
Evidence is narrow: the source describes a resolved Linux kernel crash and provides stable commit references, but no CVSS, CWE, exploit status, or full affected distribution matrix. Avoid assuming remote reachability or privilege impact without additional vendor analysis.
Mitigation direction
- Update affected Linux kernels to vendor-supported builds containing the btusb NULL-check fix.
- Prioritize laptops, workstations, kiosks, and servers where Bluetooth hardware is enabled.
- Check distribution advisories for backported fixes, not only upstream version numbers.
- Disable unused Bluetooth where operationally acceptable until patched.
- Monitor kernel logs for btusb, Bluetooth, rfkill, or NULL pointer crash traces.
Validation and detection
- Inventory Linux kernel versions and Bluetooth hardware across managed endpoints.
- Confirm whether the btusb module is present, loaded, or packaged on each system.
- Map vendor kernel builds to the upstream stable commits listed in the CVE record.
- Review crash logs for btusb_mtk_hci_wmt_sync or btusb_mtk_shutdown references.
- Validate remediation by confirming patched vendor kernel packages are installed.
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-2023-52833 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.
SSVC decision data
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/9f8e4d1a4ca1179aaeb43f91f3e2a386e7e616b3CVE reference, Linux
- https://git.kernel.org/stable/c/f9de14bde56dcbb0765284c6dfc35842b021733cCVE reference, Linux
- https://git.kernel.org/stable/c/a556f2ef556a04790f67f2fa272f1a77336d15a0CVE reference, Linux
- https://git.kernel.org/stable/c/0048ddf045bddc4dacb3e783fd869a2f8fb5be30CVE reference, Linux
- https://git.kernel.org/stable/c/13b1ebad4c175e6a9b0748acbf133c21a15d282aCVE reference, Linux
- https://git.kernel.org/stable/c/624820f7c8826dd010e8b1963303c145f99816e9CVE 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.