CVE-2022-50761

Kernel memory leak via failed interrupt binding

Published Dec 24, 2025 · Updated Dec 24, 2025

A memory leak in affected Linux kernel branches from 2.6.27 consumes memory when x86 Xen CPU lock interrupt-handler binding fails. xen_init_lock_cpu allocates the handler name with kasprintf but returns without freeing it when bind_ipi_to_irqhandler fails. Exposure is limited to the x86 Xen initialization path, and public sources establish neither attacker control of the failure nor service interruption.

CVSS severityUnavailable
Unscored
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A memory leak in affected Linux kernel branches from 2.6.27 consumes memory when x86 Xen CPU lock interrupt-handler binding fails. xen_init_lock_cpu allocates the handler name with kasprintf but returns without freeing it when bind_ipi_to_irqhandler fails. Exposure is limited to the x86 Xen initialization path, and public sources establish neither attacker control of the failure nor service interruption.

The record

CVE
CVE-2022-50761
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
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?

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  1. Affected versionversion=2.6.27
  2. Affected versionversion=2d9e1e2f58b5612aa4eab0ab54c84308a29dbd79 <07764d00c869a3390bd4f80412cc8b0e669e6c58
  3. Affected versionversion=2d9e1e2f58b5612aa4eab0ab54c84308a29dbd79 <29198f667f4486f9e227e11faf1411fcf4c82a66
  4. Affected versionversion=2d9e1e2f58b5612aa4eab0ab54c84308a29dbd79 <53ff99c76be611acea37d33133c9136969914865
  5. Affected versionversion=2d9e1e2f58b5612aa4eab0ab54c84308a29dbd79 <70966d6b0f59f795b08a70adf5e4478348ecbfbb
  6. Affected versionversion=2d9e1e2f58b5612aa4eab0ab54c84308a29dbd79 <70e7f308d7a8e915c7fbc0f1d959968eab8000cd
  7. Affected versionversion=2d9e1e2f58b5612aa4eab0ab54c84308a29dbd79 <798fc3cf98ca07e448956f39295c5d686ab4b054
  8. Affected versionversion=2d9e1e2f58b5612aa4eab0ab54c84308a29dbd79 <9278bdbb566656b3704704f8dd6cbc24a6fcc569
  9. Affected versionversion=2d9e1e2f58b5612aa4eab0ab54c84308a29dbd79 <b44457b83a034efef58ffa5f3131d4615f1a9837
  10. Affected versionversion=2d9e1e2f58b5612aa4eab0ab54c84308a29dbd79 <ca84ce153d887b1dc8b118029976cc9faf2a9b40

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.27; version=2d9e1e2f58b5612aa4eab0ab54c84308a29dbd79 <07764d00c869a3390bd4f80412cc8b0e669e6c58; version=2d9e1e2f58b5612aa4eab0ab54c84308a29dbd79 <29198f667f4486f9e227e11faf1411fcf4c82a66; version=2d9e1e2f58b5612aa4eab0ab54c84308a29dbd79 <53ff99c76be611acea37d33133c9136969914865; version=2d9e1e2f58b5612aa4eab0ab54c84308a29dbd79 <70966d6b0f59f795b08a70adf5e4478348ecbfbb; version=2d9e1e2f58b5612aa4eab0ab54c84308a29dbd79 <70e7f308d7a8e915c7fbc0f1d959968eab8000cd; version=2d9e1e2f58b5612aa4eab0ab54c84308a29dbd79 <798fc3cf98ca07e448956f39295c5d686ab4b054; version=2d9e1e2f58b5612aa4eab0ab54c84308a29dbd79 <9278bdbb566656b3704704f8dd6cbc24a6fcc569; version=2d9e1e2f58b5612aa4eab0ab54c84308a29dbd79 <b44457b83a034efef58ffa5f3131d4615f1a9837; version=2d9e1e2f58b5612aa4eab0ab54c84308a29dbd79 <ca84ce153d887b1dc8b118029976cc9faf2a9b40

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

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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)
VectorUnavailable
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.

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Technologies

Your stack

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Your stack

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