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CVE-2025-37849 is an error-path cleanup vulnerability in the Linux kernel's ARM64 KVM implementation. If kvm_arch_vcpu_create() fails to share a vCPU page with the hypervisor, it returns an error to the ioctl caller without destroying the initialized virtual Generic Interrupt Controller (vGIC) vCPU structures. This missing cleanup leaks memory when the vCPU is destroyed and can cause a use-after-free if redistributor-device handling subsequently accesses the affected vCPU. The fix destroys the vGIC vCPU structures on the failed creation path.
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A Linux kernel KVM arm64 vulnerability caused by missing cleanup after vCPU creation fails to share the vCPU page with the hypervisor. Leftover virtual Generic Interrupt Controller (vGIC) structures can cause memory leaks and use-after-free. The plugin reports a CVSS v3 base score of 7.8, with local access and low privileges required. The fix destroys the vGIC vCPU structures on error.
Linux kernel vulnerability addressed by the referenced AlmaLinux/TuxCare update.
A high-impact local vulnerability affecting Unity Linux, requiring low privileges and no user interaction, with potential for complete compromise of confidentiality, integrity, and availability.
Listed as one of 573 vulnerabilities addressed by SUSE-SU-2026:20560-1 for kernel packages in SUSE Linux Micro Extras 6.2.
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Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.