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CVE Record

CVE-2022-48851: staging: gdm724x: fix use after free in gdm_lte_rx()

In the Linux kernel, the following vulnerability has been resolved: staging: gdm724x: fix use after free in gdm_lte_rx() The netif_rx_ni() function frees the skb so we can't dereference it to save the skb->len.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2022-48851 is a Linux kernel bug in the staging gdm724x LTE driver. The driver accessed a network buffer after a kernel receive function could free it. The public bundle does not provide CVSS, impact detail, or evidence of active exploitation.

Executive priority

Treat as a targeted Linux kernel hygiene issue unless the gdm724x driver is in use. Prioritize normal kernel patching, with higher urgency for systems using this LTE driver or unclear embedded/mobile hardware builds.

Technical view

The issue is a use-after-free in gdm_lte_rx(). The vulnerable logic calls netif_rx_ni(), which can free the skb, then dereferences skb->len afterward. Stable kernel commit references are provided for fixes across branches, but the source bundle does not describe exploit primitives or security impact.

Likely exposure

Exposure appears limited to Linux systems using affected kernel versions with the staging gdm724x LTE modem driver present and active. The bundle lists Linux as affected across several kernel lines, but does not confirm which distributions or configurations ship the vulnerable driver enabled.

Exploitation context

The CVE is not listed as KEV in the provided bundle, and no cited source reports active exploitation. Available evidence supports a resolved kernel memory-safety defect, not a confirmed exploited vulnerability.

Researcher notes

The key evidence is the upstream fix rationale: netif_rx_ni() frees skb, so saving skb->len afterward is unsafe. The bundle lacks CVSS, CWE, exploitability analysis, and distribution-specific status, so validation should focus on kernel branch and driver presence.

Mitigation direction

  • Upgrade to a Linux kernel containing the relevant stable fix for your branch.
  • Check your Linux distribution advisory for packaged kernel fix status.
  • Prioritize systems using GCT/GDM724x LTE modem hardware or the gdm724x driver.
  • If exposure is uncertain, ask the vendor for affected configuration guidance.

Validation and detection

  • Inventory kernel versions across Linux assets.
  • Check whether the gdm724x staging driver is built or loaded.
  • Map each kernel branch to the referenced stable fix commits.
  • Confirm distribution kernel packages include the upstream fix.
  • Document systems where driver exposure cannot be verified.
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-2022-48851 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
LinuxLinux61e121047645122c47714fcda684d0ee67f444af, 61e121047645122c47714fcda684d0ee67f444af, 61e121047645122c47714fcda684d0ee67f444af, 61e121047645122c47714fcda684d0ee67f444af, 61e121047645122c47714fcda684d0ee67f444af, 61e121047645122c47714fcda684d0ee67f444af, 61e121047645122c47714fcda684d0ee67f444af, 61e121047645122c47714fcda684d0ee67f444afunaffected
LinuxLinux3.12, 0, 4.9.307, 4.14.272, 4.19.235, 5.4.185, 5.10.106, 5.15.29, 5.16.15, 5.17affected
Weakness

CWE details

No CWE listed

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