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CVE Record

CVE-2020-36322: An issue was discovered in the FUSE filesystem implementation in the Linux kernel before 5.10.6, aka CID-5d...

An issue was discovered in the FUSE filesystem implementation in the Linux kernel before 5.10.6, aka CID-5d069dbe8aaf. fuse_do_getattr() calls make_bad_inode() in inappropriate situations, causing a system crash. NOTE: the original fix for this vulnerability was incomplete, and its incompleteness is tracked as CVE-2021-28950.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This Linux kernel FUSE bug can crash a system when FUSE attribute handling marks an inode bad in the wrong situation. The source bundle does not show data theft, remote code execution, or confirmed active exploitation.

Executive priority

Treat this as an availability-risk kernel update. It is not presented as actively exploited, but system crashes on shared or production Linux infrastructure can create operational disruption.

Technical view

CVE-2020-36322 affects the Linux kernel FUSE implementation before 5.10.6. The issue is in fuse_do_getattr(), where make_bad_inode() is called in inappropriate situations, causing a system crash. The original fix was incomplete; that incompleteness is tracked separately as CVE-2021-28950.

Likely exposure

Exposure is most likely on Linux systems running kernels before 5.10.6, or downstream vendor kernels not yet updated for this FUSE issue. The bundle does not specify required privileges, attack path, or whether FUSE must be actively used.

Exploitation context

No KEV listing is provided, and the source bundle does not cite active exploitation. The demonstrated impact is availability loss through system crash, not confirmed confidentiality or integrity compromise.

Researcher notes

The public record is sparse: no CVSS, CWE, or precise exploit prerequisites are included. Analysis should avoid assuming remote reachability. Track CVE-2021-28950 alongside this CVE because the bundle states the original fix was incomplete.

Mitigation direction

  • Update affected Linux kernels through the official OS or appliance vendor channel.
  • Verify the vendor update also addresses the incomplete original fix tracked as CVE-2021-28950.
  • Prioritize internet-facing, multi-user, and virtualization hosts where crashes have high business impact.
  • Review Debian or product-specific advisories if using packaged downstream kernels.

Validation and detection

  • Inventory Linux kernel versions and identify systems below 5.10.6 or vendor-equivalent patched builds.
  • Check whether FUSE support is enabled or used on affected hosts.
  • Confirm installed kernel packages match relevant vendor security advisories.
  • Review crash logs for unexplained kernel panics involving FUSE, without attempting reproduction.
Prepared
Confidence
medium
Sources
7

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

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CVE-2020-36322 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
0Timeline events
0ADP providers
7Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.