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CVE Record

CVE-2022-50830: auxdisplay: hd44780: Fix potential memory leak in hd44780_remove()

In the Linux kernel, the following vulnerability has been resolved: auxdisplay: hd44780: Fix potential memory leak in hd44780_remove() hd44780_probe() allocates a memory chunk for hd with kzalloc() and makes "lcd->drvdata->hd44780" point to it. When we call hd44780_remove(), we should release all relevant memory and resource. But "lcd->drvdata ->hd44780" is not released, which will lead to a memory leak. We should release the "lcd->drvdata->hd44780" in hd44780_remove() to fix the memory leak bug.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

CVE-2022-50830 is a Linux kernel memory leak in the hd44780 auxiliary display driver. The issue occurs during driver removal, where allocated memory is not released. Business impact is likely limited to systems using this specific LCD display driver, but repeated trigger conditions could waste kernel memory and affect stability.

Executive priority

Treat as low urgency unless your environment uses hd44780 LCD hardware in embedded or appliance systems. Patch through normal kernel maintenance. Raise priority for devices with frequent driver reloads, hotplug behavior, or constrained memory.

Technical view

The Linux kernel hd44780 driver allocates memory in hd44780_probe() and stores it in lcd->drvdata->hd44780. hd44780_remove() did not free that allocation, causing a memory leak. The referenced stable kernel commits add cleanup for that allocation. No CVSS score or CWE is provided in the source bundle.

Likely exposure

Exposure appears limited to Linux systems with the auxdisplay hd44780 driver present and used, especially where the device or driver is removed or rebound. General-purpose servers are unlikely to be exposed unless this driver is enabled for attached LCD hardware.

Exploitation context

No source indicates active exploitation, public exploit availability, or CISA KEV listing. Practical impact requires conditions that invoke hd44780_remove(), such as device removal or driver unload. The primary concern is kernel memory exhaustion or instability from repeated leaks, not data theft or privilege escalation based on available evidence.

Researcher notes

The record describes a memory leak only; it does not provide CVSS, CWE, exploitability analysis, or affected distribution packages. Version data in the bundle is sparse and should be interpreted through kernel stable commits and downstream vendor advisories.

Mitigation direction

  • Update to a vendor-supported Linux kernel containing the referenced stable fixes.
  • Prioritize embedded or hardware-control systems using hd44780 LCD displays.
  • If unused, disable or avoid loading the hd44780 auxdisplay driver per vendor guidance.
  • Monitor vendor advisories for backported fixes in supported distributions.

Validation and detection

  • Identify Linux systems with hd44780 auxdisplay driver support enabled or loaded.
  • Check kernel package changelogs for the referenced stable fix commits.
  • Confirm affected embedded images are rebuilt with fixed kernel sources.
  • Review operational logs for repeated device removal or driver unload events.
Prepared
Confidence
medium
Sources
6

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

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CVE-2022-50830 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
5Source 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
LinuxLinux718e05ed92ecac0d9d3954bcc8064527c3ce7565, 718e05ed92ecac0d9d3954bcc8064527c3ce7565, 718e05ed92ecac0d9d3954bcc8064527c3ce7565, 718e05ed92ecac0d9d3954bcc8064527c3ce7565unaffected
LinuxLinux5.11, 0, 5.15.100, 6.1.18, 6.2.5, 6.3affected
Weakness

CWE details

No CWE listed

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