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CVE Record

CVE-2022-48730: dma-buf: heaps: Fix potential spectre v1 gadget

In the Linux kernel, the following vulnerability has been resolved: dma-buf: heaps: Fix potential spectre v1 gadget It appears like nr could be a Spectre v1 gadget as it's supplied by a user and used as an array index. Prevent the contents of kernel memory from being leaked to userspace via speculative execution by using array_index_nospec. [sumits: added fixes and cc: stable tags]

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2022-48730 is a Linux kernel issue in dma-buf heaps where a user-controlled value could influence speculative execution and potentially expose kernel memory. The public record describes a fix, but gives no CVSS score, CWE, or evidence of active exploitation.

Executive priority

Handle through normal kernel patch governance unless the environment has high-risk shared Linux hosts or untrusted local users. The business risk is possible kernel memory disclosure, but public evidence is incomplete.

Technical view

The flaw is described as a potential Spectre v1 gadget: user-supplied nr was used as an array index in dma-buf heaps. The kernel fix uses array_index_nospec to stop speculative out-of-bounds access from leaking kernel memory to userspace.

Likely exposure

Systems running affected Linux kernel builds with dma-buf heaps support may be exposed. Exact exposure depends on the vendor kernel, backports, configuration, and whether the referenced stable fixes are present.

Exploitation context

The bundle does not show KEV listing, public exploitation, exploit maturity, or weaponized details. Treat this as a kernel information-disclosure hardening issue unless vendor advisories provide stronger evidence.

Researcher notes

The record identifies a speculative-execution bounds issue, not a conventional direct out-of-bounds read. Validate by source review or patch presence; do not assume affected status from upstream version alone because distributors often backport fixes.

Mitigation direction

  • Apply vendor Linux kernel updates containing the referenced dma-buf heaps fix.
  • Confirm exact fixed package versions with your Linux distribution or appliance vendor.
  • Prioritize multi-user, container-host, desktop, Android-derived, or graphics-heavy Linux systems.
  • Track kernels that are unsupported or no longer receiving stable backports.

Validation and detection

  • Inventory running kernel versions across Linux hosts and appliances.
  • Check vendor changelogs for the referenced dma-buf heaps Spectre v1 fix.
  • Confirm whether local kernels include array_index_nospec in the affected dma-buf heaps path.
  • Review unsupported custom kernels for missing stable backports.
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-2022-48730 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

CVECVE Program Container
CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxc02a81fba74fe3488ad6b08bfb5a1329005418f8, c02a81fba74fe3488ad6b08bfb5a1329005418f8, c02a81fba74fe3488ad6b08bfb5a1329005418f8, c02a81fba74fe3488ad6b08bfb5a1329005418f8unaffected
LinuxLinux5.6, 0, 5.10.99, 5.15.22, 5.16.8, 5.17affected
Weakness

CWE details

No CWE listed

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