LiveActive security incident?Get immediate response
CVE Record

CVE-2022-49494: mtd: rawnand: cadence: fix possible null-ptr-deref in cadence_nand_dt_probe()

In the Linux kernel, the following vulnerability has been resolved: mtd: rawnand: cadence: fix possible null-ptr-deref in cadence_nand_dt_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.

MediumCVSS 5.5Not KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2022-49494 is a Linux kernel null pointer dereference in the Cadence raw NAND driver. On affected systems, a missing platform resource can trigger a crash during driver probing. The documented impact is availability, not data theft or tampering.

Executive priority

Treat this as a moderate availability risk for specialized Linux and embedded systems. It is not currently evidenced as exploited in the supplied sources, but kernel crashes on storage-controller paths can create operational outages where affected hardware is deployed.

Technical view

In cadence_nand_dt_probe(), platform_get_resource() may return NULL, but the code could still use the resource pointer. The kernel fix moves resource use behind checked mapping logic and simplifies it with devm_platform_get_and_ioremap_resource(). CVSS is 5.5: local, low complexity, low privileges, high availability impact.

Likely exposure

Exposure is most likely on Linux systems or embedded platforms that include the Cadence raw NAND controller driver and run affected kernel builds listed by the CVE source. General servers without this driver or hardware path are less likely exposed.

Exploitation context

The source bundle does not show CISA KEV listing or active exploitation. The CVSS vector indicates local access with low privileges and no user interaction, with impact limited to availability through a potential kernel crash.

Researcher notes

Evidence is limited to the CVE record and Linux stable commit references. Validate exposure by mapping vendor kernels to the upstream fix, because distribution kernels may backport patches without changing upstream version numbers.

Mitigation direction

  • Update to a kernel or vendor package containing the referenced stable fixes.
  • Check Linux distribution advisories for backported fixes before relying on version strings.
  • Prioritize embedded or appliance systems using Cadence raw NAND storage paths.
  • Avoid direct wrangler or deployment assumptions; follow normal vendor kernel update processes.

Validation and detection

  • Inventory kernel versions against the CVE affected-version data.
  • Identify systems with the Cadence raw NAND driver enabled or built in.
  • Confirm vendor kernel changelogs include the referenced stable commit fix.
  • Regression test boot and NAND storage access after kernel updates.
Prepared
Confidence
high
Sources
7

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

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-476: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2022-49494 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

1CVSS vectors
3Timeline events
1ADP providers
6Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
5.5CVSS 3.1MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H1.83.6CISA-ADP

Vulnerability scoring details

Base CVSS 3.1 score

5.5Medium
CVSS 3.1 vector shape for CVE-2022-49494Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

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
cvssV3_1other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxec4ba01e894d3165e4d1ccbef782ef5593b708b4, ec4ba01e894d3165e4d1ccbef782ef5593b708b4, ec4ba01e894d3165e4d1ccbef782ef5593b708b4, ec4ba01e894d3165e4d1ccbef782ef5593b708b4, ec4ba01e894d3165e4d1ccbef782ef5593b708b4unaffected
LinuxLinux5.5, 0, 5.10.121, 5.15.46, 5.17.14, 5.18.3, 5.19affected
Weakness

CWE details

CWE-476

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