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CVE Record

CVE-2022-48932: net/mlx5: DR, Fix slab-out-of-bounds in mlx5_cmd_dr_create_fte

In the Linux kernel, the following vulnerability has been resolved: net/mlx5: DR, Fix slab-out-of-bounds in mlx5_cmd_dr_create_fte When adding a rule with 32 destinations, we hit the following out-of-band access issue: BUG: KASAN: slab-out-of-bounds in mlx5_cmd_dr_create_fte+0x18ee/0x1e70 This patch fixes the issue by both increasing the allocated buffers to accommodate for the needed actions and by checking the number of actions to prevent this issue when a rule with too many actions is provided.

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 memory-safety bug in the mlx5 networking driver. A rule with many destinations could trigger a slab out-of-bounds access. The source says the kernel fix enlarges buffers and adds action-count checks. Business impact depends on whether affected kernels and mlx5 hardware or features are present.

Executive priority

Treat as targeted kernel maintenance unless mlx5-backed systems are business-critical. Prioritize confirmation and patching on hosts using the driver. Escalate if affected kernels run on externally exposed or high-availability network infrastructure.

Technical view

CVE-2022-48932 affects Linux kernel mlx5 DR handling in mlx5_cmd_dr_create_fte. The described failure occurs when adding a rule with 32 destinations, causing KASAN to report a slab-out-of-bounds access. The cited fixes adjust buffer sizing and reject excessive action counts.

Likely exposure

Most relevant exposure is Linux systems running affected 5.16-era kernels with the mlx5 driver and direct rule flow-table functionality. The bundle lists Linux 5.16, 5.16.12, and 5.17 as affected data, but does not provide distro-specific package ranges.

Exploitation context

No active exploitation is stated in the source bundle, and KEV is false. The public description gives a triggering condition from kernel testing, but does not establish remote exploitability, privilege requirements, or real-world exploitation.

Researcher notes

The bundle does not include CVSS, CWE, exploitability analysis, or distro advisories. Analysis should remain scoped to the documented mlx5 DR out-of-bounds condition and the two upstream stable commits.

Mitigation direction

  • Update affected Linux kernels to versions containing the cited stable fixes.
  • Check distribution advisories for exact fixed package versions.
  • Prioritize systems using mlx5 networking hardware or driver features.
  • If patch timing is uncertain, seek vendor guidance for supported temporary controls.

Validation and detection

  • Inventory Linux kernel versions across servers and network appliances.
  • Identify systems with mlx5 driver or relevant Mellanox/NVIDIA network adapters.
  • Confirm installed kernel packages include the referenced stable commits or later fixes.
  • Review kernel logs for KASAN or slab-out-of-bounds reports in mlx5_cmd_dr_create_fte.
Prepared
Confidence
medium
Sources
4

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.

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CVE-2022-48932 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
3Source 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
LinuxLinux1ffd498901c1134a7cbecf5409e12c064c39cef9, 1ffd498901c1134a7cbecf5409e12c064c39cef9unaffected
LinuxLinux5.16, 0, 5.16.12, 5.17affected
Weakness

CWE details

No CWE listed

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