Security readout for executives and security teams
Plain-English summary
CVE-2022-50107 is a Linux kernel CIFS issue where a page reference can be leaked when CIFS is used with FS-Cache. The public record does not provide CVSS, CWE, confirmed exploitation, or business impact details. Treat it as an availability and reliability risk until your Linux vendor clarifies severity.
Executive priority
Track and remediate through normal kernel patch management unless vendor advisories raise severity. Prioritize CIFS-heavy systems, file access infrastructure, and hosts with memory pressure. There is no provided evidence of active exploitation.
Technical view
The vulnerability is a memory leak in the Linux kernel CIFS client fscache path. In the reported index == next_cached case, a struct page refcount is leaked. The fix changes the path to use readahead_folio(), which handles the refcount.
Likely exposure
Exposure is most likely on Linux systems using the CIFS/SMB client with FS-Cache. The source lists Linux 5.17, 5.18.18, 5.19.2, and 6.0 as affected, but distro backports and exact package status require vendor verification.
Exploitation context
The CVE is not listed as CISA KEV in the provided bundle, and no cited source confirms active exploitation. The source describes a memory leak, not code execution or privilege escalation. Practical exploitability and triggering conditions are not fully documented in the provided evidence.
Researcher notes
The evidence supports a CIFS fscache memory leak fixed in stable kernel commits. The record lacks CVSS, CWE, exploit status, and detailed affected-range semantics. Avoid assuming remote exploitability or specific impact beyond potential resource leakage without additional vendor analysis.
Mitigation direction
- Update to a vendor kernel build that includes the referenced stable CIFS fixes.
- Check Linux distribution advisories for affected package versions and backported patches.
- Review vendor guidance before changing CIFS or FS-Cache settings.
- Prioritize systems that mount CIFS shares and show unexplained memory pressure.
- Monitor kernel memory behavior on CIFS clients until patched.
Validation and detection
- Inventory Linux kernel versions across CIFS client systems.
- Identify hosts using CIFS mounts with FS-Cache enabled or configured.
- Compare installed kernel changelogs against the referenced stable commits.
- Check vendor advisories for CVE-2022-50107 package status.
- Review monitoring for memory growth on CIFS-heavy workloads.
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-2022-50107 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.
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.
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/7105b4047481bc2950fb767cff328d8b75292c0fCVE reference, Linux
- https://git.kernel.org/stable/c/ae497726cd090673a4d20ac725ccc2de8067a7a5CVE reference, Linux
- https://git.kernel.org/stable/c/c6f62f81b488d00afaa86bae26c6ce9ab12c709eCVE 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.