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CVE Record

CVE-2022-48934: nfp: flower: Fix a potential leak in nfp_tunnel_add_shared_mac()

In the Linux kernel, the following vulnerability has been resolved: nfp: flower: Fix a potential leak in nfp_tunnel_add_shared_mac() ida_simple_get() returns an id between min (0) and max (NFP_MAX_MAC_INDEX) inclusive. So NFP_MAX_MAC_INDEX (0xff) is a valid id. In order for the error handling path to work correctly, the 'invalid' value for 'ida_idx' should not be in the 0..NFP_MAX_MAC_INDEX range, inclusive. So set it to -1.

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 driver bug in the NFP flower networking path. The issue can mishandle a valid MAC index as an invalid value, causing a potential resource leak during tunnel shared MAC handling. The source bundle does not provide CVSS, confirmed impact severity, or active exploitation evidence.

Executive priority

Treat as a targeted kernel maintenance item, not an emergency based on current evidence. Prioritize patching where NFP networking features are used, and fold remaining Linux systems into normal kernel update cycles unless vendor advisories raise severity.

Technical view

In nfp_tunnel_add_shared_mac(), ida_simple_get() may return NFP_MAX_MAC_INDEX, which is valid. Error handling used an invalid sentinel inside that valid range, so the fix changes ida_idx to -1. The vulnerable area is Linux kernel NFP flower tunnel shared MAC management.

Likely exposure

Exposure appears limited to affected Linux kernel versions where the NFP flower driver path is present and used. The bundle lists Linux 5.1 through fixed stable ranges, but does not provide distribution package mappings or deployment prerequisites beyond the driver context.

Exploitation context

No active exploitation is supported by the supplied sources. KEV is false, and the bundle provides no public exploit claims. The practical risk depends on whether an environment uses the affected Linux kernel NFP flower functionality.

Researcher notes

The source data is sparse: no CVSS, CWE, exploit evidence, or full impact analysis is provided. Analysis should stay anchored to the NFP flower tunnel shared MAC path and the sentinel-value fix described in the kernel commit references.

Mitigation direction

  • Apply a vendor or distribution kernel update containing the stable fix.
  • Prioritize hosts using NFP hardware or flower offload functionality.
  • Check Linux distribution advisories for fixed package versions.
  • If patch timing is constrained, review vendor guidance for safe interim controls.

Validation and detection

  • Inventory Linux kernel versions across exposed systems.
  • Identify systems using the NFP driver or flower functionality.
  • Confirm fixed stable commits are present or backported by the vendor kernel.
  • Track remediation through distribution advisory and package metadata.
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-2022-48934 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
1ADP providers
6Source 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

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux20cce88650981ec504d328dbbdd004d991eb8535, 20cce88650981ec504d328dbbdd004d991eb8535, 20cce88650981ec504d328dbbdd004d991eb8535, 20cce88650981ec504d328dbbdd004d991eb8535, 20cce88650981ec504d328dbbdd004d991eb8535unaffected
LinuxLinux5.1, 0, 5.4.182, 5.10.103, 5.15.26, 5.16.12, 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.