CVE-2022-50748

Service interruption via unreleased mqueue sysctls

Published Dec 24, 2025 · Updated Dec 24, 2025

Memory leak in Linux kernel 5.19 through 5.19.16 and 6.0 through 6.0.2 allows local users to consume memory via failed mqueue setup. When register_filesystem or mq_init_ns fails after setup_mq_sysctls succeeds, init_mqueue_fs destroys the inode cache without calling retire_mq_sysctls. The scored path requires local low-privilege access, and the published assessment reports availability impact without data access or modification.

CVSS severity5.5
Medium
EPSS probability0.23%
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 Linux kernel 5.19 through 5.19.16 and 6.0 through 6.0.2 allows local users to consume memory via failed mqueue setup. When register_filesystem or mq_init_ns fails after setup_mq_sysctls succeeds, init_mqueue_fs destroys the inode cache without calling retire_mq_sysctls. The scored path requires local low-privilege access, and the published assessment reports availability impact without data access or modification.

The record

CVE
CVE-2022-50748
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 24, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=5.19
  2. Affected versionversion=dc55e35f9e810f23dd69cfdc91a3d636023f57a2 <55b3709c6d68e32cd3fdd2a630b1f4c97d51b17c
  3. Affected versionversion=dc55e35f9e810f23dd69cfdc91a3d636023f57a2 <a1f321051e0dcf2415fb94f81fdc5044cad4c1d6
  4. Affected versionversion=dc55e35f9e810f23dd69cfdc91a3d636023f57a2 <c579d60f0d0cd87552f64fdebe68b5d941d20309

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.19; version=dc55e35f9e810f23dd69cfdc91a3d636023f57a2 <55b3709c6d68e32cd3fdd2a630b1f4c97d51b17c; version=dc55e35f9e810f23dd69cfdc91a3d636023f57a2 <a1f321051e0dcf2415fb94f81fdc5044cad4c1d6; version=dc55e35f9e810f23dd69cfdc91a3d636023f57a2 <c579d60f0d0cd87552f64fdebe68b5d941d20309

Published CVSS scores

5.5Amazon LinuxCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

No sourced classifications are available.

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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