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CVE Record

CVE-2022-48837: usb: gadget: rndis: prevent integer overflow in rndis_set_response()

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: rndis: prevent integer overflow in rndis_set_response() If "BufOffset" is very large the "BufOffset + 8" operation can have an integer overflow.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2022-48837 is a Linux kernel USB gadget RNDIS flaw where a very large buffer offset can overflow an integer. Business urgency depends on whether devices use USB gadget RNDIS. The provided sources do not include a CVSS score, confirmed impact, or active exploitation evidence.

Executive priority

Treat this as a targeted kernel maintenance issue, not an enterprise-wide emergency based on current evidence. Prioritize internet-managed appliances, embedded products, and operational devices using USB gadget networking, then fold remaining systems into normal kernel patch cycles.

Technical view

The issue is in rndis_set_response() in the Linux kernel USB gadget RNDIS implementation. The vulnerable logic can overflow when calculating BufOffset + 8 if BufOffset is very large. Kernel stable commit references are provided, but the source bundle does not describe reachable impact, crash behavior, or privilege consequences.

Likely exposure

Likely exposure is limited to Linux systems or embedded devices that enable USB gadget RNDIS functionality. General Linux servers with no USB gadget RNDIS role are less likely to be exposed, but the bundle does not provide complete affected-version ranges.

Exploitation context

The bundle does not show CISA KEV listing or other evidence of active exploitation. It also does not provide exploit prerequisites beyond the vulnerable RNDIS code path, so practical exploitability and impact remain unclear from the supplied evidence.

Researcher notes

Evidence is narrow: title, description, Linux stable commit references, and no CVSS/CWE detail. Analysis should avoid assigning impact without reviewing the commits and downstream distro advisories. The key research question is whether untrusted RNDIS input can trigger memory corruption, denial of service, or another consequence.

Mitigation direction

  • Update to a vendor-supported kernel containing the referenced stable fixes.
  • Prioritize embedded or appliance systems using USB gadget RNDIS.
  • Disable USB gadget RNDIS where it is not operationally required.
  • Check Linux distribution advisories for exact fixed package versions.
  • Track vendor firmware updates for affected devices.

Validation and detection

  • Inventory Linux kernels and devices that enable USB gadget RNDIS.
  • Compare running kernel builds against vendor advisories and stable fix references.
  • Confirm patched kernels include the rndis_set_response() overflow prevention change.
  • Review device configurations for unnecessary RNDIS gadget exposure.
  • Document exceptions where patching depends on firmware vendor release cycles.
Prepared
Confidence
medium
Sources
10

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-2022-48837 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
9Source 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
LinuxLinuxff0a90739925734c91c7e39befe3f4378e0c1369, 4c22fbcef778badb00fb8bb9f409daa29811c175, db9aaa3026298d652e98f777bc0f5756e2455dda, c9e952871ae47af784b4aef0a77db02e557074d6, fb4ff0f96de37c44236598e8b53fe43b1df36bf3, 2da3b0ab54fb7f4d7c5a82757246d0ee33a47197, 2724ebafda0a8df08a9cb91557d33226bee80f7b, 38ea1eac7d88072bbffb630e2b3db83ca649b826unaffected
LinuxLinux4.9.302, 4.14.267, 4.19.230, 5.4.180, 5.10.101, 5.15.24, 5.16.10unaffected
Weakness

CWE details

No CWE listed

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