CVE-2022-50742

Kernel resource leak via unreleased eventfd reference

Published Dec 24, 2025 · Updated Dec 24, 2025

Resource leak in the OCXL driver in Linux allows local users to retain eventfd references through a failed interrupt-handler setup. In afu_ioctl(), eventfd_ctx_fdget acquires a reference, but the error path after ocxl_irq_set_handler fails omits eventfd_ctx_put. Access to an OCXL accelerator device and a handler-setup failure are required; the published record does not demonstrate a broader impact.

CVSS severityUnavailable
Unscored
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource leak in the OCXL driver in Linux allows local users to retain eventfd references through a failed interrupt-handler setup. In afu_ioctl(), eventfd_ctx_fdget acquires a reference, but the error path after ocxl_irq_set_handler fails omits eventfd_ctx_put. Access to an OCXL accelerator device and a handler-setup failure are required; the published record does not demonstrate a broader impact.

The record

CVE
CVE-2022-50742
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

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

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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=060146614643ddc5978c73ffac0329762b4651c9 <11bd8bbdf8f6f5c1145bb158793107a57e3a1f07
  2. Affected versionversion=060146614643ddc5978c73ffac0329762b4651c9 <66032c43291672bae8b93184d2806f05be3e16df
  3. Affected versionversion=060146614643ddc5978c73ffac0329762b4651c9 <7ba19a60c74fb0057d4daef2fa2cbfc9522f3ba1
  4. Affected versionversion=060146614643ddc5978c73ffac0329762b4651c9 <843433a02e344d30fbb62dfd834c60631baaa527
  5. Affected versionversion=060146614643ddc5978c73ffac0329762b4651c9 <c3b69ba5114c860d730870c03ab4ee45276e5e35
  6. Affected versionversion=060146614643ddc5978c73ffac0329762b4651c9 <fc797285c40a9cc441357abb3521d3e51c743f67
  7. Affected versionversion=5.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=060146614643ddc5978c73ffac0329762b4651c9 <11bd8bbdf8f6f5c1145bb158793107a57e3a1f07; version=060146614643ddc5978c73ffac0329762b4651c9 <66032c43291672bae8b93184d2806f05be3e16df; version=060146614643ddc5978c73ffac0329762b4651c9 <7ba19a60c74fb0057d4daef2fa2cbfc9522f3ba1; version=060146614643ddc5978c73ffac0329762b4651c9 <843433a02e344d30fbb62dfd834c60631baaa527; version=060146614643ddc5978c73ffac0329762b4651c9 <c3b69ba5114c860d730870c03ab4ee45276e5e35; version=060146614643ddc5978c73ffac0329762b4651c9 <fc797285c40a9cc441357abb3521d3e51c743f67; version=5.2

Published CVSS scores

No CVSS assessment is available in this record.

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
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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