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CVE Record

CVE-2022-48831: ima: fix reference leak in asymmetric_verify()

In the Linux kernel, the following vulnerability has been resolved: ima: fix reference leak in asymmetric_verify() Don't leak a reference to the key if its algorithm is unknown.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel Integrity Measurement Architecture issue where a key reference is not released when an unknown signing algorithm is encountered. The public record does not provide CVSS, confirmed impact, or exploitation evidence. Treat it as a kernel maintenance risk rather than an emergency unless your vendor says otherwise.

Executive priority

Schedule remediation through normal kernel patch management. Escalate only if vendor guidance identifies higher impact for your distribution or environment.

Technical view

The issue is a reference leak in IMA asymmetric_verify(): when the key algorithm is unknown, the key reference can be leaked. The provided sources identify Linux kernel fixes in stable commits and affected Linux kernel versions, but do not describe privilege requirements, attack path, or security impact beyond the leak.

Likely exposure

Exposure is limited to Linux systems running affected kernel versions cited in the record, including 5.13, 5.15.24, 5.16.10, and 5.17. Configuration prerequisites are not fully documented in the provided sources.

Exploitation context

No active exploitation is supported by the provided sources. The CVE is not listed as KEV in the bundle, and no cited source describes public exploitation, weaponization, or real-world attacks.

Researcher notes

Evidence is narrow: the sources identify a resolved Linux kernel reference leak but omit CVSS, CWE, exploitation status, and detailed impact. Avoid assuming remote code execution or privilege escalation without additional vendor evidence.

Mitigation direction

  • Apply Linux vendor kernel updates that include the referenced stable fixes.
  • Prioritize systems using IMA or signature verification workflows.
  • Check distribution advisories for supported fixed kernel packages.
  • If patch timing is delayed, follow vendor guidance for interim controls.

Validation and detection

  • Inventory Linux kernel versions across servers, appliances, and images.
  • Compare installed kernels against vendor advisories and the referenced stable fixes.
  • Confirm upgraded systems boot into the intended fixed kernel.
  • Review IMA usage on systems where kernel integrity verification is enabled.
Prepared
Confidence
medium
Sources
5

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-2022-48831 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
4Source 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
LinuxLinux947d70597236dd5ae65c1f68c8eabfb962ee5a6b, 947d70597236dd5ae65c1f68c8eabfb962ee5a6b, 947d70597236dd5ae65c1f68c8eabfb962ee5a6bunaffected
LinuxLinux5.13, 0, 5.15.24, 5.16.10, 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.