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CVE Record

CVE-2022-49435: mfd: davinci_voicecodec: Fix possible null-ptr-deref davinci_vc_probe()

In the Linux kernel, the following vulnerability has been resolved: mfd: davinci_voicecodec: Fix possible null-ptr-deref davinci_vc_probe() It will cause null-ptr-deref when using 'res', if platform_get_resource() returns NULL, so move using 'res' after devm_ioremap_resource() that will check it to avoid null-ptr-deref. And use devm_platform_get_and_ioremap_resource() to simplify code.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This Linux kernel issue is a null-pointer dereference in the DaVinci voice codec driver probe path. The public record does not provide a CVSS score or confirmed exploitation. Business impact is most likely limited to systems that include this specific driver and platform configuration.

Executive priority

Treat as a targeted kernel maintenance item, not an emergency, unless affected embedded or hardware-specific Linux systems are in production. Prioritize normal patch intake and asset validation.

Technical view

davinci_vc_probe() could use a NULL resource returned by platform_get_resource(). The fix moves resource use behind checked ioremap handling and simplifies it with devm_platform_get_and_ioremap_resource(). Sources identify Linux kernel versions and stable commits, but do not describe remote exploitation or privilege impact.

Likely exposure

Exposure appears limited to Linux kernels in the listed affected ranges where the DaVinci voice codec driver is present and exercised. Broad enterprise exposure is uncertain without kernel configuration and hardware/platform inventory.

Exploitation context

CISA KEV status is false in the supplied bundle. No cited source claims active exploitation, exploit availability, remote reachability, or a privilege escalation path. Evidence only supports a possible kernel null-pointer dereference.

Researcher notes

The record lacks CVSS, CWE, exploitability detail, and concrete attack prerequisites. Analysis should focus on the driver probe path, platform resource handling, affected kernel branches, and distro backport mapping.

Mitigation direction

  • Check Linux distribution advisories for fixed kernel packages covering this CVE.
  • Apply kernel stable updates that include the referenced upstream fixes.
  • Prioritize systems using DaVinci voice codec hardware or related kernel modules.
  • Avoid relying on unverified workarounds unless vendor guidance supports them.

Validation and detection

  • Inventory Linux kernel versions against the affected version data in the CVE record.
  • Confirm whether davinci_voicecodec support is built, packaged, or loaded.
  • Verify installed kernels include one of the referenced stable fix commits.
  • Track vendor advisory status where packaged kernel versions differ from upstream.
Prepared
Confidence
medium
Sources
8

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-2022-49435 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
7Source 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
LinuxLinuxb5e29aa880be84c271be8d0726cec4018bfbfd74, b5e29aa880be84c271be8d0726cec4018bfbfd74, b5e29aa880be84c271be8d0726cec4018bfbfd74, b5e29aa880be84c271be8d0726cec4018bfbfd74, b5e29aa880be84c271be8d0726cec4018bfbfd74, b5e29aa880be84c271be8d0726cec4018bfbfd74unaffected
LinuxLinux5.4, 0, 5.4.198, 5.10.121, 5.15.46, 5.17.14, 5.18.3, 5.19affected
Weakness

CWE details

No CWE listed

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