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CVE Record

CVE-2022-48753: block: fix memory leak in disk_register_independent_access_ranges

In the Linux kernel, the following vulnerability has been resolved: block: fix memory leak in disk_register_independent_access_ranges kobject_init_and_add() takes reference even when it fails. According to the doc of kobject_init_and_add() If this function returns an error, kobject_put() must be called to properly clean up the memory associated with the object. Fix this issue by adding kobject_put(). Callback function blk_ia_ranges_sysfs_release() in kobject_put() can handle the pointer "iars" properly.

MediumCVSS 5.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel memory-management bug in block-device registration. If a specific setup path fails, the kernel did not release an object reference correctly, causing a memory leak. The business risk is moderate and mainly applies to systems where local users or workloads can exercise affected kernel paths.

Executive priority

Treat as routine but necessary kernel maintenance. It does not justify emergency response from the provided evidence, but shared Linux infrastructure should receive timely patched kernels through normal change windows.

Technical view

The flaw is in disk_register_independent_access_ranges(). kobject_init_and_add() keeps a reference even on failure, and the vulnerable code missed the required kobject_put() cleanup. The fix adds kobject_put(), letting blk_ia_ranges_sysfs_release() free the affected iars object correctly.

Likely exposure

Exposure is limited to affected Linux kernel builds, including 5.16-era versions or kernels derived from the listed vulnerable commit. CVSS marks attack vector as local with low privileges required. Downstream distribution backports may change exposure.

Exploitation context

The bundle does not indicate CISA KEV listing or active exploitation. The CVSS vector suggests local, low-complexity exploitation with low confidentiality, integrity, and availability impact. No remote attack path is supported by the provided sources.

Researcher notes

Evidence supports a missing cleanup on a kobject initialization failure path. The source bundle does not include CWE mapping, exploit details, affected CPEs, or distribution-specific package status, so validation should rely on kernel lineage and vendor backport records.

Mitigation direction

  • Upgrade to a Linux kernel containing the referenced stable fixes.
  • Check your Linux distribution advisory for backported kernel packages.
  • Prioritize multi-user hosts, shared compute, and container platforms first.
  • Avoid assuming version strings alone prove vulnerability or safety.

Validation and detection

  • Inventory running kernel versions and distribution package revisions.
  • Check vendor changelogs for the two referenced stable commits.
  • Confirm whether kernels descend from commit a2247f19ee1c.
  • Review asset classes with local untrusted user or workload access.
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

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-2022-48753 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.3 (3.1)
Known Exploited
No
Published

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

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
2ADP providers
3Source 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
5.3CVSS 3.1MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L1.83.4CISA-ADP

Vulnerability scoring details

Base CVSS 3.1 score

5.3Medium
CVSS 3.1 vector shape for CVE-2022-48753Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

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
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxa2247f19ee1c5ad75ef095cdfb909a3244b88aa8, a2247f19ee1c5ad75ef095cdfb909a3244b88aa8unaffected
LinuxLinux5.16, 0, 5.16.5, 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.