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CVE Record

CVE-2022-50875: of: overlay: fix null pointer dereferencing in find_dup_cset_node_entry() and find_dup_cset_prop()

In the Linux kernel, the following vulnerability has been resolved: of: overlay: fix null pointer dereferencing in find_dup_cset_node_entry() and find_dup_cset_prop() When kmalloc() fail to allocate memory in kasprintf(), fn_1 or fn_2 will be NULL, and strcmp() will cause null pointer dereference.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2022-50875 is a Linux kernel flaw in device-tree overlay handling. If memory allocation fails, the kernel can dereference a null pointer while comparing strings, likely causing a crash. Public sources do not provide a CVSS score or evidence of active exploitation.

Executive priority

Treat as a normal kernel maintenance priority unless your environment heavily uses device-tree overlays, especially embedded or appliance fleets. There is no public evidence of active exploitation in the provided sources, but kernel crash risk can affect availability.

Technical view

The issue is in the Linux kernel OF overlay code, specifically find_dup_cset_node_entry() and find_dup_cset_prop(). Failed kmalloc() allocation through kasprintf() can leave fn_1 or fn_2 as NULL, then strcmp() triggers a null pointer dereference. Stable kernel commits are referenced as fixes.

Likely exposure

Exposure appears limited to Linux systems using affected kernel versions and code paths involving OF/device-tree overlays. The source bundle lists Linux as affected but version metadata is not fully clear, so validate against kernel stable fixes or distribution advisories.

Exploitation context

No CISA KEV listing or cited source indicates active exploitation. The described condition depends on allocation failure and reaching specific overlay duplicate-checking code, suggesting denial-of-service risk rather than confirmed privilege escalation or remote compromise.

Researcher notes

The public record lacks CVSS, CWE, and detailed exploitability analysis. Assessment is based on the kernel commit description: allocation failure leads to NULL arguments to strcmp(). Avoid assuming remote reachability; focus validation on kernel version, backports, and overlay usage.

Mitigation direction

  • Review vendor or distribution guidance for CVE-2022-50875.
  • Update to a kernel containing the referenced stable fix commits.
  • Prioritize systems that use device-tree overlays or embedded Linux kernels.
  • Track whether your distribution backported the fix without changing major kernel version.

Validation and detection

  • Inventory Linux kernel versions across affected assets.
  • Check whether the kernel includes one of the referenced stable commits.
  • Confirm whether device-tree overlay functionality is enabled or used.
  • Review distribution security advisories for backport status and package names.
Prepared
Confidence
medium
Sources
8

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-2022-50875 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
LinuxLinux2fe0e8769df9fed5098daea7db933bc414c329d7, 2fe0e8769df9fed5098daea7db933bc414c329d7, 2fe0e8769df9fed5098daea7db933bc414c329d7, 2fe0e8769df9fed5098daea7db933bc414c329d7, 2fe0e8769df9fed5098daea7db933bc414c329d7, 2fe0e8769df9fed5098daea7db933bc414c329d7unaffected
LinuxLinux5.0, 0, 5.4.229, 5.10.163, 5.15.86, 6.0.16, 6.1.2, 6.2affected
Weakness

CWE details

No CWE listed

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