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CVE Record

CVE-2022-48964: ravb: Fix potential use-after-free in ravb_rx_gbeth()

In the Linux kernel, the following vulnerability has been resolved: ravb: Fix potential use-after-free in ravb_rx_gbeth() The skb is delivered to napi_gro_receive() which may free it, after calling this, dereferencing skb may trigger use-after-free.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2022-48964 is a Linux kernel bug in the ravb network driver. A packet buffer may be used after it has been handed to code that can free it. Business risk depends on whether affected kernels and this driver are present; the source bundle does not provide CVSS, impact rating, or exploit evidence.

Executive priority

Track as a focused kernel maintenance item, not an emergency based on the provided evidence. Prioritize assets using the ravb driver or affected embedded kernels, and require confirmation that vendor kernel updates or backports include the fix.

Technical view

The flaw is a potential use-after-free in ravb_rx_gbeth(). After skb is delivered to napi_gro_receive(), that call may free it, so later dereferencing skb can trigger unsafe memory access. The public record points to Linux stable commits as the resolution but does not describe attacker prerequisites or reliable exploitability.

Likely exposure

Exposure appears limited to Linux systems running affected kernel versions or downstream builds containing the vulnerable ravb driver code. The bundle lists Linux 5.16, 6.0.13, and 6.1 as affected, but does not map downstream distribution packages or appliance firmware.

Exploitation context

The source bundle does not report active exploitation, and CISA KEV status is false. It also does not provide exploit details, attack complexity, privileges required, or whether remote traffic alone can trigger the issue. Treat exploitability as unproven from these sources.

Researcher notes

Evidence is narrow: the record describes a use-after-free pattern and links two stable kernel commits. No CVSS, CWE, exploit status, triggering conditions, or downstream package mapping is included. Validation should focus on code lineage, driver presence, and vendor backport confirmation.

Mitigation direction

  • Apply vendor kernel updates that include the linked Linux stable fixes.
  • Check distribution advisories for backported fixes to supported kernel packages.
  • Prioritize systems where the ravb driver is present and enabled.
  • If patching is delayed, review vendor guidance for driver-specific mitigations.

Validation and detection

  • Inventory Linux kernel versions against the affected versions listed in the CVE bundle.
  • Check whether the ravb driver is built, loaded, or required on each system.
  • Confirm installed kernel packages include the referenced stable commits or vendor backports.
  • Review kernel logs for ravb-related crashes while treating logs as non-definitive.
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.

ATT&CK lookup starting points

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CVE-2022-48964 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
LinuxLinux1c59eb678cbd8d322d06d3a5514d36e8e1a4e84c, 1c59eb678cbd8d322d06d3a5514d36e8e1a4e84cunaffected
LinuxLinux5.16, 0, 6.0.13, 6.1affected
Weakness

CWE details

No CWE listed

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