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CVE Record

CVE-2022-49423: rtla: Avoid record NULL pointer dereference

In the Linux kernel, the following vulnerability has been resolved: rtla: Avoid record NULL pointer dereference Fix the following null/deref_null.cocci errors: ./tools/tracing/rtla/src/osnoise_hist.c:870:31-36: ERROR: record is NULL but dereferenced. ./tools/tracing/rtla/src/osnoise_top.c:650:31-36: ERROR: record is NULL but dereferenced. ./tools/tracing/rtla/src/timerlat_hist.c:905:31-36: ERROR: record is NULL but dereferenced. ./tools/tracing/rtla/src/timerlat_top.c:700:31-36: ERROR: record is NULL but dereferenced. "record" is NULL before calling osnoise_init_trace_tool. Add a tag "out_free" to avoid dereferring a NULL pointer.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

CVE-2022-49423 is a Linux rtla tooling bug where an error path could dereference a NULL pointer. The evidence points to a crash risk in Linux tracing utilities, not remote system compromise. No active exploitation is reported in the provided sources, and no CVSS score is available.

Executive priority

Treat as routine patch management unless rtla is operationally important in production diagnostics. The known impact is availability of a tracing tool, with no evidence of active exploitation or broader compromise in the supplied sources.

Technical view

The fix addresses NULL pointer dereferences in tools/tracing/rtla source files for osnoise and timerlat hist/top paths. The CVE text states record is NULL before osnoise_init_trace_tool and adds an out_free path to avoid dereferencing it. Affected Linux versions include 5.18-era releases per the CVE record.

Likely exposure

Exposure is likely limited to environments using affected Linux kernel source/tooling that includes rtla, especially Linux 5.18 through the fixed stable updates. Systems not using rtla may still carry the code but have lower practical exposure.

Exploitation context

The public record describes static-analysis-found NULL dereference errors. The provided sources do not show remote exploitation, privilege escalation, public exploit code, or CISA KEV listing. Practical impact appears to be local rtla tool failure under specific error handling conditions.

Researcher notes

Evidence is narrow: CVE text and kernel stable commits only. Severity, CWE, and CVSS are not provided. The bug is in Linux tools/tracing/rtla, so validation should distinguish kernel runtime exposure from installed developer or tracing tooling.

Mitigation direction

  • Update to a Linux kernel or rtla package containing the referenced stable fixes.
  • Check your Linux distribution advisory for backported fixes.
  • Prioritize systems where rtla tracing utilities are installed or used.
  • If updates are unavailable, limit rtla use to trusted administrators.

Validation and detection

  • Inventory systems for Linux 5.18-era kernels and rtla tooling.
  • Confirm vendor packages include the referenced stable commits.
  • Review distribution changelogs for CVE-2022-49423 coverage.
  • Verify rtla users are limited to authorized administrators.
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

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CVE-2022-49423 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
0ADP providers
3Source links

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.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux51d64c3a181938da8fb56404524e15776e9c6bf8, 51d64c3a181938da8fb56404524e15776e9c6bf8unaffected
LinuxLinux5.18, 0, 5.18.3, 5.19affected
Weakness

CWE details

No CWE listed

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