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CVE Record

CVE-2022-48907: auxdisplay: lcd2s: Fix memory leak in ->remove()

In the Linux kernel, the following vulnerability has been resolved: auxdisplay: lcd2s: Fix memory leak in ->remove() Once allocated the struct lcd2s_data is never freed. Fix the memory leak by switching to devm_kzalloc().

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

CVE-2022-48907 is a Linux kernel memory leak in the lcd2s auxiliary display driver cleanup path. It is not described as code execution or privilege escalation. Business urgency is generally low unless you run Linux systems using this uncommon driver and allow device removal or driver unload events.

Executive priority

Low priority for most enterprises. Treat as routine kernel hygiene unless your environment uses lcd2s auxiliary display hardware or custom embedded Linux builds. Roll into normal kernel maintenance after confirming vendor applicability.

Technical view

The Linux kernel lcd2s auxdisplay driver allocated struct lcd2s_data but did not free it in the remove path. The upstream fix switches allocation to devm_kzalloc(), making cleanup device-managed. Public sources provide no CVSS score, CWE, exploit details, or KEV listing.

Likely exposure

Exposure appears limited to Linux systems with the lcd2s auxdisplay driver present and relevant hardware or driver lifecycle activity. Systems not using this driver are unlikely to be meaningfully exposed. The source data lists Linux 5.11 and fix-related versions/commits, but affected-version boundaries are not fully clear.

Exploitation context

No cited source reports active exploitation. The issue is a memory leak triggered during driver removal, suggesting availability/resource-consumption impact rather than direct compromise. Practical exploitation would likely require local control over device or driver lifecycle conditions.

Researcher notes

The public record is sparse: no CVSS, no CWE, and no exploitation evidence. The bug is narrowly scoped to auxdisplay/lcd2s remove cleanup. Version interpretation should be validated against the upstream stable commits and downstream distribution backports.

Mitigation direction

  • Check distribution or kernel vendor advisories for CVE-2022-48907 coverage.
  • Update to a kernel containing the referenced stable fixes where applicable.
  • Disable or avoid loading the lcd2s driver if it is unnecessary.
  • Prioritize embedded or specialized systems using auxiliary display hardware.

Validation and detection

  • Inventory kernels and confirm whether lcd2s support is built or loaded.
  • Compare deployed kernel packages against vendor advisory status.
  • Review kernel changelog for the referenced lcd2s devm_kzalloc fix.
  • Monitor for unusual memory growth after lcd2s device removal events.
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-2022-48907 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
1ADP 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

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux8c9108d014c5bd0f0da2e3544eb45dc56a6da92b, 8c9108d014c5bd0f0da2e3544eb45dc56a6da92b, 8c9108d014c5bd0f0da2e3544eb45dc56a6da92bunaffected
LinuxLinux5.11, 0, 5.15.27, 5.16.13, 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.