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CVE Record

CVE-2023-53483: ACPI: processor: Check for null return of devm_kzalloc() in fch_misc_setup()

In the Linux kernel, the following vulnerability has been resolved: ACPI: processor: Check for null return of devm_kzalloc() in fch_misc_setup() devm_kzalloc() may fail, clk_data->name might be NULL and will cause a NULL pointer dereference later. [ rjw: Subject and changelog edits ]

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 issue can cause a crash if a memory allocation fails in ACPI processor setup and the code later uses a null pointer. Public sources do not show active exploitation or a CVSS score. Business urgency is mainly availability risk for systems running affected kernel versions.

Executive priority

Treat as a routine-to-near-term kernel maintenance item unless affected systems support critical availability needs. There is no public evidence of active exploitation, but kernel crash risk justifies patch tracking and validation through normal change windows.

Technical view

CVE-2023-53483 fixes a missing null check after devm_kzalloc() in fch_misc_setup(). If allocation fails, clk_data->name may remain NULL and later trigger a NULL pointer dereference. The CVE record lists Linux kernel versions including 5.17, 6.1.30, 6.3.4, and 6.4 as affected, with stable kernel commits referenced as fixes.

Likely exposure

Exposure is limited to Linux systems running affected kernel builds or downstream kernels that have not backported the referenced fix. The source data does not identify specific distributions, configurations, or hardware requirements beyond the Linux kernel ACPI processor code path.

Exploitation context

No CISA KEV listing is present, and the provided sources do not report active exploitation. The described impact is a NULL pointer dereference, most likely an availability issue, but exploitability details are not provided in the public record.

Researcher notes

The record lacks CVSS, CWE, distribution mapping, and detailed exploitability conditions. Affected-version encoding is limited and may not translate cleanly to downstream vendor kernels. Confirm exposure by source commit presence or vendor backport status rather than version strings alone.

Mitigation direction

  • Update to a kernel version containing the referenced stable fixes.
  • Check Linux distribution advisories for backported patches.
  • Prioritize production systems running affected kernel branches.
  • Track vendor guidance if using custom or appliance kernels.

Validation and detection

  • Inventory Linux kernel versions across servers and endpoints.
  • Compare running kernels with the CVE affected-version data.
  • Verify whether vendor kernels include the referenced stable commits.
  • Review crash logs for related ACPI processor null dereference symptoms.
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

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CVE-2023-53483 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
LinuxLinux7fdb98e8a768b3ccc05494d3ea4436047f512b9d, 7fdb98e8a768b3ccc05494d3ea4436047f512b9d, 7fdb98e8a768b3ccc05494d3ea4436047f512b9dunaffected
LinuxLinux5.17, 0, 6.1.30, 6.3.4, 6.4affected
Weakness

CWE details

No CWE listed

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