CVE-2022-50830

Service interruption via leaked device memory

Published Dec 30, 2025 · Updated Dec 30, 2025

Memory leak in the Linux kernel hd44780 driver allows local users to exhaust kernel memory by repeatedly removing LCD devices. hd44780_probe allocates the hd44780 state with kzalloc, but hd44780_remove frees the surrounding driver data without freeing the referenced state. Reaching the faulty cleanup path requires local privileges and a configured HD44780 platform device; repeated removals can interrupt service through memory exhaustion.

CVSS severity6.8
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in the Linux kernel hd44780 driver allows local users to exhaust kernel memory by repeatedly removing LCD devices. hd44780_probe allocates the hd44780 state with kzalloc, but hd44780_remove frees the surrounding driver data without freeing the referenced state. Reaching the faulty cleanup path requires local privileges and a configured HD44780 platform device; repeated removals can interrupt service through memory exhaustion.

The record

CVE
CVE-2022-50830
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 30, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.11
  2. Affected versionversion=718e05ed92ecac0d9d3954bcc8064527c3ce7565 <5d407911e605702ffcc0e97a6db546592ab27dd0
  3. Affected versionversion=718e05ed92ecac0d9d3954bcc8064527c3ce7565 <6cd37f8232f5e169a723e1d5fbe3b2139c2ef763
  4. Affected versionversion=718e05ed92ecac0d9d3954bcc8064527c3ce7565 <8311961a1724bfc64390c539dedc31e067a80315
  5. Affected versionversion=718e05ed92ecac0d9d3954bcc8064527c3ce7565 <ddf75a86aba2cfb7ec4497e8692b60c8c8fe0ee7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.11; version=718e05ed92ecac0d9d3954bcc8064527c3ce7565 <5d407911e605702ffcc0e97a6db546592ab27dd0; version=718e05ed92ecac0d9d3954bcc8064527c3ce7565 <6cd37f8232f5e169a723e1d5fbe3b2139c2ef763; version=718e05ed92ecac0d9d3954bcc8064527c3ce7565 <8311961a1724bfc64390c539dedc31e067a80315; version=718e05ed92ecac0d9d3954bcc8064527c3ce7565 <ddf75a86aba2cfb7ec4497e8692b60c8c8fe0ee7

Published CVSS scores

6.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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