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CVE Record

CVE-2022-50217: fuse: write inode in fuse_release()

In the Linux kernel, the following vulnerability has been resolved: fuse: write inode in fuse_release() A race between write(2) and close(2) allows pages to be dirtied after fuse_flush -> write_inode_now(). If these pages are not flushed from fuse_release(), then there might not be a writable open file later. So any remaining dirty pages must be written back before the file is released. This is a partial revert of the blamed commit.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel FUSE data-write race. Under specific write and close timing, dirty file pages may remain unwritten when the file is released. The public record does not provide CVSS, CWE, or exploit evidence, so business urgency depends on whether systems use affected Linux kernels and FUSE.

Executive priority

Treat as a targeted kernel maintenance issue unless your environment depends heavily on FUSE for critical data paths. There is no sourced evidence of exploitation or severity scoring, but the described failure mode can affect data reliability, which may matter for storage, backup, and synchronization workflows.

Technical view

The flaw is a race between write(2) and close(2) in FUSE release handling. Pages can become dirty after fuse_flush calls write_inode_now(). The fix ensures remaining dirty pages are written back from fuse_release() before the file is released, because a later writable open file may not exist.

Likely exposure

Exposure is most relevant to Linux systems running affected kernel versions or commits with FUSE filesystems in use. The source bundle lists Linux kernel version indicators including 5.16, 5.18.18, 5.19.2, and 6.0, but exact range semantics are incomplete in the provided data.

Exploitation context

No cited source states active exploitation, and CISA KEV is false in the bundle. The evidence describes a kernel data-write race, not a remote network exploit path. Practical impact should be assessed as potential file writeback or data integrity risk where FUSE is used.

Researcher notes

The available record is sparse: no CVSS, CWE, or detailed affected range semantics are provided. Analysis should focus on commit ancestry, distribution backports, and whether local workloads can trigger the write/close race in FUSE-backed filesystems. Avoid assuming confidentiality or code execution impact from the supplied sources.

Mitigation direction

  • Check the Linux vendor or distribution advisory for CVE-2022-50217 coverage.
  • Update kernels to versions containing the referenced stable fixes.
  • Prioritize systems using FUSE-backed filesystems or workloads with write-heavy file activity.
  • Review operational backups and data integrity monitoring for affected FUSE workloads.

Validation and detection

  • Inventory Linux kernel versions across production and developer systems.
  • Identify systems with FUSE modules, mounts, or FUSE-dependent applications.
  • Map running kernels against vendor advisories and referenced stable commits.
  • Confirm patched kernels are deployed and active after reboot.
Prepared
Confidence
medium
Sources
5

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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

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CVE-2022-50217 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
3Timeline events
0ADP providers
4Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux36ea23374d1f7b6a9d96a2b61d38830fdf23e45d, 36ea23374d1f7b6a9d96a2b61d38830fdf23e45d, 36ea23374d1f7b6a9d96a2b61d38830fdf23e45dunaffected
LinuxLinux5.16, 0, 5.18.18, 5.19.2, 6.0affected
Weakness

CWE details

No CWE listed

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