Security readout for executives and security teams
Plain-English summary
CVE-2022-49368 is a Linux kernel flaw in the MediaTek Ethernet driver. A local, low-privileged user could supply an invalid receive-filter location through ethtool handling, causing the kernel to read outside expected memory. The public record rates it high because it may expose sensitive information or affect system availability.
Executive priority
Treat as high priority where MediaTek-based Linux systems allow local users or untrusted workloads. For general servers without this driver or hardware path, urgency is lower but still requires normal kernel patch governance.
Technical view
The issue is a CWE-125 out-of-bounds read in mtk_hwlro_get_fdir_entry() in the Linux mtk_eth_soc Ethernet driver. The vulnerable path trusts fsp->location from ethtool_get_rxnfc(); the fix validates that location before use. CVSS 3.1 is 7.1: local attack, low complexity, low privileges, no user interaction, high confidentiality and availability impact.
Likely exposure
Exposure is most relevant to Linux systems using the MediaTek mtk_eth_soc Ethernet driver and affected kernel lines identified in the CVE data. This is not described as remotely reachable; the CVSS vector requires local access and low privileges.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. Exploitation requires local access and interaction with ethtool receive-flow classification handling. The record does not provide public exploit details, and none should be assumed.
Researcher notes
Evidence is limited to the CVE record and Linux stable references. The root condition is missing bounds validation for a user-influenced ethtool location value. The supplied data names fixed commits but does not provide distribution-specific package status or exploit telemetry.
Mitigation direction
- Update affected Linux kernels to vendor-supported builds containing the referenced stable fixes.
- Prioritize systems using MediaTek Ethernet hardware or the mtk_eth_soc driver.
- Check distribution advisories for exact fixed package versions before rollout.
- Restrict unnecessary local shell access on exposed systems.
- Monitor kernel logs for instability until patched.
Validation and detection
- Inventory Linux hosts and identify kernels using the mtk_eth_soc driver.
- Compare running kernel builds with vendor advisories and referenced stable commits.
- Confirm patched builds include validation for fsp->location in mtk_hwlro_get_fdir_entry().
- Review local user access on affected appliances or embedded systems.
- Track whether downstream vendors backported the kernel fix.
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-125: 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-2022-49368 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
- 7.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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:H/I:N/A:H1.85.2CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
7.1HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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/b4f0e57ea0d867aacffad7999527e48bd4ea9293CVE reference, Linux
- https://git.kernel.org/stable/c/5ba81f82607ead85fe36f50869fc4f5661359ab8CVE reference, Linux
- https://git.kernel.org/stable/c/657e7174603f0aab2cdedc64ac81edffd2a87afeCVE reference, Linux
- https://git.kernel.org/stable/c/2bd1faedb74dc2a2be3972abcd4239b75a3e7b00CVE reference, Linux
- https://git.kernel.org/stable/c/71ae30662ec610b92644d13f79c78f76f17873b3CVE reference, Linux
- https://git.kernel.org/stable/c/b24ca1cf846273361d5bd73a35de95a486a54b6dCVE reference, Linux
- https://git.kernel.org/stable/c/4cde554c70d7397cfa2e4116bacb4accdfb6fd48CVE reference, Linux
- https://git.kernel.org/stable/c/0b238f75b65ed4462ef4cdfa718cac0ac7fce3b8CVE reference, Linux
- https://git.kernel.org/stable/c/e7e7104e2d5ddf3806a28695670f21bef471f1e1CVE 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.
Out-of-bounds Read
Out-of-bounds Read represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.