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CVE Record

CVE-2022-50761: x86/xen: Fix memory leak in xen_init_lock_cpu()

In the Linux kernel, the following vulnerability has been resolved: x86/xen: Fix memory leak in xen_init_lock_cpu() In xen_init_lock_cpu(), the @name has allocated new string by kasprintf(), if bind_ipi_to_irqhandler() fails, it should be freed, otherwise may lead to a memory leak issue, fix it.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel memory leak in x86 Xen initialization. If an internal IRQ handler binding fails, a newly allocated string is not freed. The public record provides no CVSS score and no evidence of active exploitation. Business urgency is mainly for organizations running Linux under Xen or maintaining Xen-capable kernels.

Executive priority

Handle through normal kernel patch management unless Xen infrastructure is business-critical. There is no provided evidence of exploitation or high severity, but unpatched kernel defects can accumulate operational risk.

Technical view

In xen_init_lock_cpu(), name is allocated with kasprintf(). On bind_ipi_to_irqhandler() failure, the error path did not free that allocation, causing a memory leak. The fix frees the allocation on failure. The issue is tied to Linux x86 Xen code, not a broad remote-entry vulnerability based on the provided sources.

Likely exposure

Most relevant to Linux systems using or shipping x86 Xen kernel support. Exposure should be confirmed through distro kernel advisories because the CVE record lists upstream versions and stable commits, not every vendor package or backport.

Exploitation context

No source in the bundle reports active exploitation, and CISA KEV status is false. The condition appears to require an internal failure during Xen CPU lock initialization, limiting practical attacker-driven exposure based on available evidence.

Researcher notes

Evidence is limited to the CVE description and upstream stable commit references. No CVSS, CWE, exploitability assessment, or distro-specific fixed package list is provided. Avoid assuming remote triggerability or universal Linux exposure without Xen configuration and vendor mapping.

Mitigation direction

  • Check Linux distribution advisories for CVE-2022-50761 coverage.
  • Update affected kernels to vendor releases containing the stable fix.
  • Prioritize Xen hosts and kernels built with x86 Xen support.
  • Track upstream stable commits if maintaining custom kernels.

Validation and detection

  • Inventory Linux kernel versions on Xen hosts.
  • Confirm whether kernels include the referenced stable commit or vendor backport.
  • Review distro CVE pages for package-specific fixed versions.
  • Reboot into the updated kernel after patching, if required by vendor guidance.
Prepared
Confidence
medium
Sources
11

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

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2022-50761 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
0Timeline events
0ADP providers
10Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux2d9e1e2f58b5612aa4eab0ab54c84308a29dbd79, 2d9e1e2f58b5612aa4eab0ab54c84308a29dbd79, 2d9e1e2f58b5612aa4eab0ab54c84308a29dbd79, 2d9e1e2f58b5612aa4eab0ab54c84308a29dbd79, 2d9e1e2f58b5612aa4eab0ab54c84308a29dbd79, 2d9e1e2f58b5612aa4eab0ab54c84308a29dbd79, 2d9e1e2f58b5612aa4eab0ab54c84308a29dbd79, 2d9e1e2f58b5612aa4eab0ab54c84308a29dbd79, 2d9e1e2f58b5612aa4eab0ab54c84308a29dbd79unaffected
LinuxLinux2.6.27, 0, 4.9.337, 4.14.303, 4.19.270, 5.4.229, 5.10.163, 5.15.86, 6.0.16, 6.1.2, 6.2affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.