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CVE Record

CVE-2022-48863: mISDN: Fix memory leak in dsp_pipeline_build()

In the Linux kernel, the following vulnerability has been resolved: mISDN: Fix memory leak in dsp_pipeline_build() dsp_pipeline_build() allocates dup pointer by kstrdup(cfg), but then it updates dup variable by strsep(&dup, "|"). As a result when it calls kfree(dup), the dup variable contains NULL. Found by Linux Driver Verification project (linuxtesting.org) with SVACE.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's Takeunknown

Analyst readout for executives and security teams

Plain-English summary

This CVE is a Linux kernel memory leak in the mISDN subsystem. A copied configuration string is not freed correctly after parsing, so memory can be lost. The public record does not provide CVSS, attack requirements, or confirmed exploitation, so urgency depends on whether affected kernels and mISDN are present.

Executive priority

Handle through normal kernel maintenance unless mISDN is used in business-critical or constrained systems. Escalate if affected kernels are present on devices where memory exhaustion could disrupt service.

Technical view

dsp_pipeline_build() allocates a duplicate of cfg with kstrdup(), then changes that pointer during strsep() parsing. By the time kfree() runs, the pointer is NULL, so the original allocation is leaked. The source bundle says Linux resolved this through stable kernel commits.

Likely exposure

Exposure is most relevant to Linux systems running affected kernel versions where the mISDN subsystem is built, loaded, or reachable. The source bundle does not establish whether typical server, desktop, or embedded configurations expose the vulnerable path.

Exploitation context

No cited source reports active exploitation, and CISA KEV status is false. The provided record does not describe remote reachability, privileges required, triggers, or practical impact beyond memory leakage.

Researcher notes

Evidence is limited to the CVE record and upstream stable commit references. There is no CVSS, CWE, exploit narrative, or configuration matrix in the bundle. Treat exploitability and exposure as unproven without vendor-specific analysis.

Mitigation direction

  • Check vendor kernel advisories for fixed packages or backports.
  • Prioritize updates for systems using ISDN or mISDN functionality.
  • If mISDN is unnecessary, consider disabling or excluding it per vendor guidance.
  • Track affected kernel branches against the referenced stable commits.

Validation and detection

  • Inventory Linux kernel versions across managed assets.
  • Identify whether mISDN support is compiled, packaged, or loaded.
  • Confirm distribution patches include the referenced upstream fixes.
  • Review monitoring for unexplained kernel memory pressure on relevant systems.
Prepared
Confidence
medium
Sources
6

Public sources used

Based on public source material and reviewed before publication.

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-2022-48863 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
5Source 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
LinuxLinux960366cf8dbb3359afaca30cf7fdbf69a6d6dda7, 960366cf8dbb3359afaca30cf7fdbf69a6d6dda7, 960366cf8dbb3359afaca30cf7fdbf69a6d6dda7, 960366cf8dbb3359afaca30cf7fdbf69a6d6dda7unaffected
LinuxLinux2.6.27, 0, 5.10.106, 5.15.29, 5.16.15, 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.