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CVE Record

CVE-2022-48703: thermal/int340x_thermal: handle data_vault when the value is ZERO_SIZE_PTR

In the Linux kernel, the following vulnerability has been resolved: thermal/int340x_thermal: handle data_vault when the value is ZERO_SIZE_PTR In some case, the GDDV returns a package with a buffer which has zero length. It causes that kmemdup() returns ZERO_SIZE_PTR (0x10). Then the data_vault_read() got NULL point dereference problem when accessing the 0x10 value in data_vault. [ 71.024560] BUG: kernel NULL pointer dereference, address: 0000000000000010 This patch uses ZERO_OR_NULL_PTR() for checking ZERO_SIZE_PTR or NULL value in data_vault.

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 reliability flaw in the int340x thermal driver path. When firmware data includes a zero-length buffer, the kernel can mishandle a special pointer value and trigger a NULL pointer dereference. The public record does not provide CVSS, confirmed exploitation, or business impact beyond the kernel fault.

Executive priority

Treat this as a routine kernel maintenance item unless vendor advisories raise severity for your environment. There is no supplied evidence of active exploitation, but kernel crash bugs can still affect availability on exposed hardware and should be folded into normal Linux patch cycles.

Technical view

The issue occurs when GDDV returns a package containing a zero-length buffer. kmemdup() can return ZERO_SIZE_PTR, but data_vault_read() later treats that value unsafely. The upstream fix checks data_vault with ZERO_OR_NULL_PTR() so both NULL and ZERO_SIZE_PTR are handled before access.

Likely exposure

Exposure appears limited to Linux systems running affected kernel versions and exercising the thermal/int340x_thermal data_vault path. The bundle lists Linux 5.8, 5.10.258, 5.15.189, 5.19.9, and 6.0 as affected-version entries, but exact distribution package status must be verified with vendor advisories.

Exploitation context

No active exploitation is supported by the supplied sources, and the CVE is not listed as KEV. The provided description shows a kernel NULL pointer dereference at address 0x10, suggesting a crash or denial-of-service style impact, but no exploitability details are provided.

Researcher notes

The source evidence is narrow: a resolved Linux kernel NULL pointer dereference involving ZERO_SIZE_PTR from kmemdup() after a zero-length GDDV buffer. The record lacks CVSS, CWE, attack vector, privileges required, and distribution-specific fixed versions, so validation should rely on kernel source or vendor backports.

Mitigation direction

  • Check your Linux distribution advisory for CVE-2022-48703 package status.
  • Update to a kernel build containing the referenced upstream stable fix.
  • Prioritize systems using affected Linux kernel versions and the int340x thermal driver path.
  • Track vendor guidance if exact kernel backport status is unclear.

Validation and detection

  • Inventory running kernel versions across Linux fleets.
  • Check whether vendor kernel changelogs reference CVE-2022-48703 or the stable commits.
  • Review kernel logs for related NULL pointer dereferences in int340x_thermal paths.
  • Confirm patched systems include ZERO_OR_NULL_PTR handling for data_vault.
Prepared
Confidence
medium
Sources
6

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-2022-48703 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
2ADP providers
5Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

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.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux0ba13c763aacb27ab32bde5d559bf40e88465921, 0ba13c763aacb27ab32bde5d559bf40e88465921, 0ba13c763aacb27ab32bde5d559bf40e88465921, 0ba13c763aacb27ab32bde5d559bf40e88465921unaffected
LinuxLinux5.8, 0, 5.10.258, 5.15.189, 5.19.9, 6.0affected
Weakness

CWE details

No CWE listed

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