Security readout for executives and security teams
Plain-English summary
CVE-2022-49754 is a Linux kernel Bluetooth flaw where a small buffer can be overfilled during mesh management handling. The CVSS rating is high because successful local exploitation could affect confidentiality, integrity, and availability. Evidence provided does not show internet-wide or active exploitation.
Executive priority
Treat this as a high-priority kernel maintenance issue for Linux fleets, especially shared or user-accessible systems. It does not currently have supplied evidence of active exploitation, but kernel memory corruption with high CIA impact warrants timely patch validation.
Technical view
The flaw is in net/bluetooth/mgmt_util.c mgmt_mesh_add(). A caller allows input lengths up to 50 bytes, while the destination mesh_tx->param buffer is 48 bytes. This creates a CWE-120 buffer overflow in affected Linux kernel Bluetooth code. CVSS indicates local attack vector, low complexity, low privileges, and no user interaction.
Likely exposure
Exposure is most relevant to Linux systems running affected kernel versions or vendor kernels carrying the vulnerable Bluetooth management code. The provided CVSS vector indicates local, low-privilege access is required. Systems without the affected kernel code path or already carrying the stable fixes are less likely exposed.
Exploitation context
The source bundle marks KEV as false, and no supplied source states active exploitation. The vulnerability is not described as remotely exploitable; CVSS lists local access with low privileges. Practical exploitability depends on kernel build, Bluetooth support, and vendor backport status.
Researcher notes
The key technical evidence is the size mismatch: 48-byte destination versus an accepted 50-byte length in the Bluetooth mesh send path. The source bundle identifies stable Linux fixes but does not provide exploit proof, distribution-specific package names, or full affected-version ranges beyond the listed kernel data.
Mitigation direction
- Update to a Linux kernel or vendor package containing the referenced stable fixes.
- Check distribution advisories for backported fixes, since vendor kernel versions may differ.
- Prioritize patching shared, multi-user, and Bluetooth-capable Linux hosts.
- Limit local user access on affected systems until remediation is confirmed.
- Track vendor guidance for any Bluetooth-specific compensating controls.
Validation and detection
- Inventory Linux kernel versions across servers, workstations, appliances, and embedded systems.
- Identify systems with Bluetooth kernel support enabled or relevant modules present.
- Compare installed kernels against vendor advisories and the referenced stable commits.
- Confirm the fixed package is installed after patching and reboot into the fixed kernel.
- Document exceptions where vendor status is unavailable or evidence is incomplete.
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.
CWE-120: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2022-49754 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.
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:H/I:H/A:H1.85.9CISA-ADPVulnerability 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.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/ed818fd8c531abf561b379995ee7cc4c68029464CVE reference, Linux
- https://git.kernel.org/stable/c/2185e0fdbb2137f22a9dd9fcbf6481400d56299bCVE 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.
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.