Security readout for executives and security teams
Plain-English summary
This is a Linux kernel availability flaw in the VMware VMCI path. A local user or process could trigger a kernel deadlock condition, causing service disruption. The sources do not indicate data theft, privilege escalation, or active exploitation.
Executive priority
Treat as a moderate-priority availability risk. Patch through normal kernel maintenance, with faster handling for critical VMware-hosted Linux workloads that rely on VMCI or vsock.
Technical view
vmci_dispatch_dgs ran as a tasklet and called vmci_read_data, which can sleep through wait_event. Sleeping in atomic context is invalid and may deadlock. The kernel fix replaces tasklet handling with threaded IRQs.
Likely exposure
Exposure is most relevant to Linux systems running affected kernels with the VMCI/vmw_vmci path in use, such as VMware guest environments using VMCI or vsock-related functionality. The CVSS vector requires local privileges.
Exploitation context
The provided sources list KEV as false and provide no evidence of active exploitation. Impact is availability-only under the CVSS vector, with no confidentiality or integrity impact stated.
Researcher notes
Evidence supports a local denial-of-service class issue caused by invalid sleeping in atomic context. The supplied record does not establish remote reachability, privilege escalation, public exploit availability, or a non-patch mitigation.
Mitigation direction
- Apply a vendor kernel update containing the referenced VMCI threaded IRQ fix.
- Check distro or appliance vendor guidance for exact affected package versions.
- Prioritize VMware guest workloads where VMCI or vsock functionality is enabled.
- If patching is delayed, request vendor-supported workaround guidance.
Validation and detection
- Inventory Linux kernel versions against the affected ranges in the CVE record.
- Identify systems loading or using the vmw_vmci driver or VMCI functionality.
- Confirm patched kernels include the referenced stable kernel commits.
- Review kernel logs for VMCI sleep-in-atomic or deadlock warnings.
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-667: Exact CWE lookup
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Open ATT&CK lookupCVE-2022-49759 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/548ea9dd5e01b0ecf53d2563004c80abd636743dCVE reference, Linux
- https://git.kernel.org/stable/c/3daed6345d5880464f46adab871d208e1baa2f3aCVE 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.
Improper Locking
Improper Locking represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.