Bug 2425106 (CVE-2022-50761)

Summary: CVE-2022-50761 kernel: Linux kernel (x86/xen): Memory leak in CPU lock initialization leading to denial of service.
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's x86/xen component. A local user could exploit a memory leak vulnerability during the initialization of the CPU lock in the `xen_init_lock_cpu()` function. If a specific internal function fails after memory allocation, the allocated memory is not properly released. This can lead to resource exhaustion and a Denial of Service (DoS) condition on the affected system.
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Description OSIDB Bzimport 2025-12-24 14:03:16 UTC 
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.
Comment 1 Alexander B 2025-12-25 02:12:54 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025122455-CVE-2022-50761-0e67@gregkh/T